List of publications

Ilya G. Usoskin

search also the ADS Abstract Service,

BOOKS

  • Usoskin, I. and Poluianov, S. (2025) Cosmic-ray-induced processes in the atmosphere In: Weis, D and Anbar, A. (eds.) Treatise on Geochemistry, 3e. Vol. 8, pp. 451-467.UK: Elsevier.
  • Borthakur, M., M. Sinnhuber, A. Laeng, T. Reddmann, P. Braesicke, G. Stiller, T. Clarmann, B. Funke, I. Usoskin, J. Wissing, O. Yakovchuk (2024). Determining the Impact of Chlorine Ion Chemistry on Ozone Loss in the Middle Atmosphere during Very Large Solar Proton Events. Emerging Issues in Env., Geogr. Earth Sci., 7, 1-40, doi: 10.9734/bpi/eieges/v7/7247C
  • Miyake, F., I. Usoskin, S. Poluianov (eds), Extreme Solar Particle Storms: the hostile Sun, IOP Publ., Bristol UK, 2019, doi: 10.1088/2514-3433/ab404a. 8
  • Usoskin, I.G., N. Krivova, Climate and Weather of the Sun-Earth System, Encyclopedia of Life Support Systems, E6-119-37, 2011. (pdf here).
  • Usoskin, I.G., G.A. Kovaltsov, Link between cosmic rays and clouds on different time scales, in: "Advances in Geosciences", v.2 (eds. W.-H. Ip, M. Duldig) World Scientific, Singapore, pp.321-330, 2006.
  • Miyahara, H., D. Sokoloff, and I.G. Usoskin, The solar cycle at the Maunder minimum epoch, in: "Advances in Geosciences", v.2., (eds. W.-H. Ip, M. Duldig) World Scientific, Singapore, pp.1-20, 2006.
  • Usoskin, I.G., Long-Term Variations of Cosmic Rays and Terrestrial Environment, in: Frontiers of Cosmic Ray Science, (eds. T.Kajita, Y. Asaoka, A.Kawachi, Y.Matsubara, M.Sasaki), Universal Academy Press, Tokyo, p.205-228, 2004.

    REFEREED INTERNATIONAL JOURNALS

      2024

    1. Vasilyev V., T. Reinhold, A. Shapiro, I. Usoskin, N. Krivova, H. Maehara, Y. Notsu, A. Brun, S. Solanki, L. Gizon (2024) Sun-like stars produce superflares roughly once per century, Science 386, 1301-1305. Doi:10.1126/science.adl5441.
    2. Heaton, T., E. Bard, A. Bayliss, M. Blaauw, C. Bronk Ramsey, P.J. Reimer, C.S.M. Turney, I. Usoskin (2024) Extreme solar storms and the quest for exact dating with radiocarbon, Nature, 633, 306-317. Doi: 10.1038/s41586-024-07679-4.
    3. Mishev, A., N. Larsen, E. Asvestari, ... I. Usoskin (2024) Anisotropic Forbush decrease of 24 March 2024: First look, Adv. Space Res., 74, 4160-4172. Doi: /10.1016/j.asr.2024.08.027.
    4. Usoskin I.G., G.A. Kovaltsov, A.L. Mishev (2024) Updated model of cosmic-ray-induced ionization in the atmosphere (CRAC:CRII_v3): Improved yield function and lookup tables, J. Space Weather Space Clim. 14, 20. Doi: 10.1051/swsc/2024020.
    5. Golubenko, K., E. Rozanov, G. Kovaltsov, M. Baroni, T. Sukhodolov, I. Usoskin (2024) Full Modeling and Practical Parameterization of Cosmogenic 10Be Transport for Cosmic-Ray Studies: SOCOL-AERv2-BE Model, J. Geophys. Res. Space Phys., 129, e2024JA032504, Doi: 10.1029/2024JA032504.
    6. Gil, A., E. Asvestari, A. Mishev, N. Larsen, I. Usoskin (2024) New anisotropic cosmic-ray enhancement (ACRE) event on 5 November 2023 due to complex heliospheric conditions, Sol. Phys., 299, 97, doi: 10.1007/s11207-024-02338-3.
    7. Arsenovic, P., E. Rozanov, I. Usoskin, ... T. Peter (2024) Global impacts of an extreme solar particle event under different geomagnetic field strengths, Proc. Nat. Acad. Sci., 121, e2321770121, doi: 10.1073/pnas.2321770121.
    8. Aguilar, M. et al. (2024) Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer, Phys. Rev. Lett., 132, 261001. doi:10.1103/PhysRevLett.132.261001.
    9. Owens, M., L. Barnard, R. Muscheler, K. Herbst, M. Lockwood, I. Usoskin, E.Asvestari (2024) A Geomagnetic Estimate of Heliospheric Modulation Potential over the Last 175 Years, Solar Phys., 299, 86, doi: 10.1007/s11207-024-02316-9.
    10. Hayakawa, H., S. Koldobskiy, A. Mishev, S. Poluianov, A. Gil, I. Usoskina, I. Usoskin (2024) Revision of the strongest solar energetic particle event of 23 February 1956 (GLE #5) based on the rediscovered original records, Astron. Astrophys., 684, A46, doi: 10.1051/0004-6361/202348699.
    11. Uusitalo, J., K. Golubenko, L. Arppe, ... I. Usoskin (2024) Transient Offset in 14C After the Carrington Event Recorded by Polar Tree Rings, Geophys. Res. Lett., 51, e2023GL106632, doi: 10.1029/2023GL106632.
    12. Funke, B., T. Dudok de Wit, I. Ermolli, ... I. Usoskin (2024) Towards the definition of a solar forcing dataset for CMIP7, Geosci. Mod. Dev., 17, 1217, doi: 10.5194/gmd-17-1217-2024.
    13. Mishev, A.L., Koldobskiy, S.A., Larsen, N., I. Usoskin (2024) Spectra and Anisotropy of Solar Energetic Protons During GLE #65 on 28 October, 2003 and GLE #66 on 29 October, 2003. Sol. Phys. 299, 24. doi: 10.1007/s11207-024-02269-z.
    14. Poluianov, S., O. Batalla, A. Mishev, S. Koldobskiy, I. Usoskin (2024) Two New Sub-GLEs Found in Data of Neutron Monitors at South Pole and Vostok: On 09 June 1968 and 27 February 1969. Sol Phys 299, 6. Doi: 10.1007/s11207-023-02245-z
    15. Owens, M., M. Lockwood, L. Barnard, I. Usoskin, H. Hayakawa, B. Pope, K. McCracken (2024) Reconstructing Sunspot Number by Forward-Modelling Open Solar Flux, Solar Phys., 299, 3, doi: 10.1007/s11207-023-02241-3.

      2023

    16. Kocharov, L., A. Mishev, E. Riihonen, R. Vainio, I. Usoskin (2023) A Comparative Study of Ground-level Enhancement Events of Solar Energetic Particles, Astrophys. J., 958, 122, doi: 10.3847/1538-4357/acfee8.
    17. Usoskin, I., Miyake, F., Baroni, M. et al., Extreme Solar Events: Setting up a Paradigm. Space Sci. Rev. 219, 73 (2023) doi: 10.1007/s11214-023-01018-1
    18. Norton, A., R. Howe, L. Upton, I. Usoskin (2023) Solar Cycle Observations. Space Sci Rev 219, 64. https://doi.org/10.1007/s11214-023-01008-3
    19. Aguilar, M. et al. (2023) Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays, Phys. Rev. Lett., 131, 151002. doi:10.1103/PhysRevLett.131.151002.
    20. Borthakur, M., M. Sinnhuber, A. Laeng, T. Reddmann, P. Braesicke, G. Stiller, T. von Clarmann, B. Funke, I. Usoskin, J.M. Wissing, O. Yakovchuk (2023) Impact of chlorine ion chemistry on ozone loss in the middle atmosphere during very large solar proton events, Atmos. Chem. Phys., 23, 12985-13013, doi: 10.5194/acp-23-12985-2023.
    21. Mishev, A., S. Panovska, I. Usoskin (2023) Assessment of the radiation risk at flight altitudes for an extreme solar particle storm of 774 AD, J. Space Weather Space Clim., 13, 22, doi: 10.1051/swsc/2023020
    22. Dash, S., D. Nandy, I. Usoskin (2023) Long-term forcing of the Sun's coronal field, open flux, and cosmic ray modulation potential during grand minima, maxima, and regular activity phases by the solar dynamo mechanism, Mon. Not. Royal Astron. Soc., 525, 4801-4814, doi: 10.1093/mnras/stad1807
    23. Nandy, D., et al. Exploring the Solar Poles: The Last Great Frontier of the Sun. Bulletin of the AAS, 55(3) (2023) Doi: 10.3847/25c2cfeb.1160b0ef
    24. Panovska, S., S. Poluianov, J. Gao, M. Korte, A. Mishev, Y. Shprits, I. Usoskin. Effects of Global Geomagnetic Field Variations Over the Past 100,000 Years on Cosmogenic Radionuclide Production Rates in the Earth's Atmosphere. J. Geophys. Res.: Space Phys., 128(8), e2022JA031158 (2023) doi: 10.1029/2022JA031158
    25. Reddmann, Th., M. Sinnhuber, J. Wissing, O. Yakovchuk, and I. Usoskin, The impact of an extreme solar event on the middle atmosphere: a case study, Atmos. Chem. Phys., 23, 6989-7000 (2023), doi: 10.5194/acp-23-6989-2023
    26. Aguilar, M. et al. (AMS collaboration), Properties of Cosmic-Ray Sulfur and Determination of the Composition of Primary Cosmic-Ray Carbon, Neon, Magnesium, and Sulfur: Ten-Year Results from the Alpha Magnetic Spectrometer, Phys. Rev. Lett., 130, 211002 (2023) doi: 10.1103/PhysRevLett.130.211002
    27. Usoskin, I.G., A history of solar activity over millennia, Liv. Rev Solar Phys., 20, 2 (2023) doi: 10.1007/s41116-023-00036-z
    28. Aguilar, M. et al. (AMS collaboration), Temporal Structures in Electron Spectra and Charge Sign Effects in Galactic Cosmic Rays, Phys. Rev. Lett., 130, 161001 (2023) doi:10.1103/PhysRevLett.130.161001.
    29. Vaisanen, P., I. Usoskin, R. Kahkonen, S. Koldobskiy, K. Mursula, Revised Reconstruction of the Heliospheric Modulation Potential for 1964-2022, J. Geophys. Res. (Space Phys.) 128, e2023JA031352 (2023) doi: 10.1029/2023JA031352.
    30. Clette, F., L. Lefevre, T. Chatzistergos, ... I.G. Usoskin, L. van Driel-Gesztelyi, J.M. Vaquero, Recalibration of the Sunspot-Number: Status Report, Solar Phys. 298, 44, (2023) doi: 10.1007/s11207-023-02136-3.
    31. Koldobskiy, S., F. Mekhaldi, G. Kovaltsov, I. Usoskin, Multiproxy Reconstructions of Integral Energy Spectra for Extreme Solar Particle Events of 7176 BCE, 660 BCE, 775 CE, and 994 CE, J. Geophys. Res. (Space Phys.), 128, e2022JA031186 (2023) doi: 10.1029/2022JA031186
    32. Biswas, A., B.B. Karak, I. Usoskin, E. Weisshaar, Long-Term Modulation of Solar Cycles, Space Sci. Rev., 219, 19 (2023) doi: 10.1007/s11214-023-00968-w.
    33. Usoskin, I.G., S.A. Koldobskiy, S.V. Poluianov, O. Raukunen, R. Vainio, G.A. Kovaltsov, Consistency of the average flux of solar energetic particles over timescales of years to megayears, Astron. Astrophys. Lett., 670, L22 (2023), doi: 10.1051/0004-6361/202245810.
    34. Larsen, N., A. Mishev, I. Usoskin, A New Open-Source Geomagnetosphere Propagation Tool (OTSO) and Its Applications, J. Geophys. Res. (Space Phys.), 128, e2022JA031061 (2023) doi: 10.1029/2022JA031061

      2022

    35. Vasilyev, V., T. Reinhold, A.I. Shapiro, N.A. Krivova, I. Usoskin, B.T. Monte, S.K. Solanki, L. Gizon, Superflares on solar-like stars A new method for identifying the true flare sources in photometric surveys, Astron. Astrophys., 668, A167 (2022), doi: 10.1051/0004-6361/202244422.
    36. Tanaka, H.K.M., Gluyas, J., Holma, M. et al. Atmospheric muography for imaging and monitoring tropic cyclones. Sci Rep 12, 16710 (2022). Doi: 10.1038/s41598-022-20039-4
    37. Gil, A., A. Mishev, S. Poluianov, I. Usoskin, Diurnal anisotropy of polar neutron monitors: Dome C looks poleward, Adv. Space Res., 70, 2618, 2022, doi: 10.1016/j.asr.2021.12.010
    38. Raukunen, O, I. Usoskin, S. Koldobskiy, G. Kovaltsov, R. Vainio, Annual integral solar proton fluences for 1984--2019, Astron. Astrophys., 665, A65 (2022) doi: 10.1051/0004-6361/202243736
    39. Owens, M.J., L.A. Barnard, B.J.S. Pope, M. Lockwood, I. Usoskin, E. Asvestari, Solar Energetic-Particle Ground-Level Enhancements and the Solar Cycle, Solar Phys., 297, 105 (2022). Doi: 10.1007/s11207-022-02037-x
    40. Golubenko, K., E. Rozanov, G. Kovaltsov, I. Usoskin, Zonal Mean Distribution of Cosmogenic Isotope (7Be, 10Be, 14C, and 36Cl) Production in Stratosphere and Troposphere, J. Geophys. Res. Atmos., 127, e2022JD036726, 2022. doi:10.1029/2022JD036726
    41. Trzaska, W., Barzilov, A., Enqvist, T., Jedrzejczak, K., Joutsenvaara, J., Kasztelan, M., Kotavaara, O., Kuusiniemi, P., Loo, K., Orzechowski, J., Puputti, J., Slupecki, M., Szabelski, J., Usoskin, I., Ward, T., NEMESIS setup for Indirect Detection of WIMPs, Nucl. Inst. Meth. Phys. Res. A, 1040, 167223, 2022. doi: 10.1016/j.nima.2022.167223
    42. Mishev, A.L. L.G. Kocharov, S.A. Koldobskiy, N. Larsen, E. Riihonen, R. Vainio, I.G. Usoskin, High-Resolution Spectral and Anisotropy Characteristics of Solar Protons During the GLE No.73 on 28 October 2021 Derived with Neutron-Monitor Data Analysis, Solar Phys. 297, 88, 2022, doi: 10.1007/s11207-022-02026-0
    43. Pearson, C., S. Leavitt, B. Kromer, S. Solanki, I. Usoskin, Dendrochronology and radiocarbon dating. Radiocarbon, 64(3), 569-588 2022, doi:10.1017/RDC.2021.97.
    44. Cliver, E.W., C.J. Schrijver, K. Shibata, I.G. Usoskin, Extreme solar events. Living Rev. Sol. Phys. 19, 2 (2022). doi: 10.1007/s41116-022-00033-8
    45. Aguilar, M. et al. (AMS Collaboration) Properties of Daily Helium Fluxes, Phys. Rev. Lett. 128, 231102, 2022, doi: 10.1103/PhysRevLett.128.231102.
    46. Makrantoni, P., A. Tezari, A. Stassinakis, P. Paschalis, M. Gerontidou, P. Karaiskos, A. Georgakilas, H. Mavromichalaki, I. Usoskin, N. Crosby, M. Dierckxsens. Estimation of Cosmic-Ray-Induced Atmospheric Ionization and Radiation at Commercial Aviation Flight Altitudes. Appl. Sci., 12, 5297 (2022) doi: 10.3390/app12115297.
    47. Mishev, A., A. Binios, E. Turunen, A.-P. Leppanen, N. Larsen, E. Tanskanen, I. Usoskin, J. Envall, T. Iinatti, P. Lakkala, Measurements of natural radiation with an MDU Liulin type device at ground and in the atmosphere at various conditions in the Arctic region, Rad. Meas., 154, 106757 (2022), doi: 10.1016/j.radmeas.2022.106757
    48. Papaioannou, A., A. Kouloumvakos, A. Mishev, R. Vainio, I. Usoskin, K. Herbst, A.P. Rouillard, A. Anastasiadis, J. Gieseler, R. Wimmer-Schweingruber, P. Kuehl, The first ground-level enhancement of solar cycle 25 on 28 October 2021, Astron. Astrophys., 660, L5 (2022) doi: 10.1051/0004-6361/202142855
    49. Koldobskiy, S.A., R. Kahkonen, B. Hofer, N.A. Krivova, G.A. Kovaltsov, I.G. Usoskin, Time Lag Between Cosmic-Ray and Solar Variability: Sunspot Numbers and Open Solar Magnetic Flux, Solar Phys., 297, 38 (2022) doi: 10.1007/s11207-022-01970-1.
    50. Koldobskiy, S., I. Usoskin, and G.A. Kovaltsov, Effective energy of cosmogenic isotope (10Be, 14C and 36Cl) production by solar energetic particles and galactic cosmic rays, J. Geophys. Res. Space Phys., 127, e2021JA029919 (2022) doi: 10.1029/2021JA029919.
    51. Brehm, N., Christl, M., ... Usoskin, I., Wacker, L., Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE. Nat Commun 13, 1196 (2022) doi: 10.1038/s41467-022-28804-9

      2021

    52. Aguilar, M. et al. (AMS collaboration), Periodicities in the Daily Proton Fluxes from 2011 to 2019 Measured by the Alpha Magnetic Spectrometer on the International Space Station from 1 to 100 GV, Phys. Rev. Lett., 127, 271102 (2021), doi: 10.1103/PhysRevLett.127.271102.
    53. Trzaska, W., Enqvist,T., Jedrzejczak,K., Joutsenvaara,J., Kasztelan,M., Kotavaara, O., Kuusiniemi, P., Loo, K., Orzechowski, J., Puputti, J., Slupecki, M., Szabelski, J., Usoskin, I., Warda, T. DM-like anomalies in neutron multiplicity spectra, J. Phys.: Conf. Ser 2156, 012029 (2021)
    54. Golubenko, K., E. Rozanov, G. Kovaltsov, A.-P. Leppanen, T. Sukhodolov, I. Usoskin, Application of CCM SOCOL-AERv2-BE to cosmogenic beryllium isotopes: description and validation for polar regions, Geosci. Model Dev., 14, 7605-7620 (2021) doi:10.5194/gmd-14-7605-2021
    55. Usoskin, I.G., G.A. Kovaltsov, Mind the gap: New precise 14C data indicate the nature of extreme solar particle events. Geophys. Res. Lett., 48, e2021GL094848, 2021. doi: 10.1029/2021GL094848
    56. Aguilar, M. et al. (AMS collaboration), Properties of a New Group of Cosmic Nuclei: Results from the Alpha Magnetic Spectrometer on Sodium, Aluminum, and Nitrogen, Phys. Rev. Lett., 127, 021101 (2021), doi: 10.1103/PhysRevLett.127.021101..
    57. Kocharov, L., N. Omodei, A. Mishev, M. Pesce-Rollins, F. Longo, S. Yu, D.E. Gary, R. Vainio, I. Usoskin, Multiple Sources of Solar High-energy Protons, Astrophys. J., 915, 12 (2021) doi: 10.3847/1538-4357/abff57.
    58. Krivova, N.A., S.K. Solanki, B. Hofer, C.-J. Wu, I.G. Usoskin, R. Cameron, Modelling the evolution of the Sun’s open and total magnetic flux, Astron. Astrophys., 650 A70 (2021) doi: 10.1051/0004-6361/202140504
    59. Usoskin, I.G., S.K. Solanki, N.A. Krivova, B. Hofer, G A. Kovaltsov, L. Wacker, N. Brehm and B. Kromer, Solar cyclic activity over the last millennium reconstructed from annual 14C data, Astron. Astrophys., 649, A141 (2021) doi: 10.1051/0004-6361/202140711
    60. Mishev, A.L., S.A. Koldobskiy, L.G. Kocharov, I.G Usoskin, GLE# 67 Event on 2 November 2003: An Analysis of the Spectral and Anisotropy Characteristics Using Verified Yield Function and Detrended Neutron Monitor Data, Solar Phys., 296, 79, 2021, doi: 10.1007/s11207-021-01832-2.
    61. Vaisanen, P., I. Usoskin, and K. Mursula, Seven decades of neutron monitors (1951-2019): Overview and evaluation of data sources. J. Geophys. Res. Space Phys., 126, e2020JA028941, 2021. doi: 10.1029/2020JA028941.
    62. Simila, M., I. Usoskin, S. Poluianov, A. Mishev, G.A. Kovaltsov, D. Strauss, High-Altitude Polar NM With the New DAQ System as a Tool to Study Details of the Cosmic-Ray Induced Nucleonic Cascade, J. Geophys. Res. Space Phys., 126, e2020JA028959, 2021, doi: 10.1029/2020JA028959.
    63. Koldobskiy, S., O. Raukunen, R. Vainio, G.A. Kovaltsov, I. Usoskin, New reconstruction of event-integrated spectra (spectral fluences) for major solar energetic particle events, Astron. Astrophys. 647, A132 (2021) doi: 10.1051/0004-6361/202040058
    64. Brehm, N., A. Bayliss, M. Christl, H. Synal, F. Adolphi, J. Beer, B. Kromer, R. Muscheler, S. Solanki, I. Usoskin, N. Bleicher, S. Bollhalder, C. Tyers, L. Wacker, Eleven-year solar cycles over the last millennium revealed by radiocarbon in tree rings. Nat. Geosci. 14, 10, 2021. Doi: 10.1038/s41561-020-00674-0
    65. Aguilar, M. et al. (AMS Collaboration), Properties of Heavy Secondary Fluorine Cosmic Rays: Results from the Alpha Magnetic Spectrometer, Phys. Rev. Lett. 126, 081102 (2021) doi: 10.1103/PhysRevLett.126.081102.
    66. Aguilar, M. et al. (AMS collaboration), The Alpha Magnetic Spectrometer (AMS) on the international space station: Part II - Results from the first seven years, Phys. Rep., 894, 1-116, 2021, doi: 10.1016/j.physrep.2020.09.003
    67. Mishev, A.L., S.A. Koldobskiy, I.G. Usoskin, L.G. Kocharov and G.A. Kovaltsov, Application of the Verified Neutron Monitor Yield Function for an Extended Analysis of the GLE # 71 on 17 May 2012, Space Weather, 19, e2020SW002626 (2021), doi: 10.1029/2020SW002626
    68. Usoskin, I.G., G.A. Kovaltsov, W. Kiviaho, Robustness of Solar-Cycle Empirical Rules Across Different Series Including an Updated Active-Day Fraction (ADF) Sunspot Group Series, Solar Phys., 296, 13, 2021. Doi: 10.1007/s11207-020-01750-9
    69. Aguilar, M. et al. (AMS Collaboration), Properties of Iron Primary Cosmic Rays: Results from the Alpha Magnetic Spectrometer, Phys. Rev. Lett. 126, 041104 (2021) doi: 10.1103/PhysRevLett.126.041104.

      2020

    70. Terrasi, F., Marzaioli, F., Buompane, R., Passariello, I., Porzio, G., Capano, M., ... Usoskin, I, Can the 14C production in 1055 CE be affected by SN1054? Radiocarbon, 62(5), 1403-1418, 2020. doi:10.1017/RDC.2020.58
    71. Poluianov, S.V., G.A. Kovaltsov, I.G. Usoskin, A new full 3-D model of cosmogenic tritium 3H production in the atmosphere (CRAC:3H). J Geophys. Res. Atmos., 125, e2020JD033147, 2020. doi: 10.1029/2020JD033147
    72. Strauss, D., S. Poluianov, C. van der Merwe, H. Krueger, C. Diedericks, H., I. Usoskin et al., The mini-neutron monitor: a new approach in neutron monitor design, J. Space Weather Space Clim., 10, 39, 2020, doi: 10.1051/swsc/2020038.
    73. Usoskin, I., S. Koldobskiy, G.A. Kovaltsov, A. Gil, I. Usoskina, T. Willamo and A. Ibragimov, Revised GLE database: Fluences of solar energetic particles as measured by the neutron-monitor network since 1956, Astron. Astrophys., 640, A17, 2020, doi: 10.1051/0004-6361/202038272.
    74. Golubenko, K., E. Rozanov, I. Mironova, A. Karagodin, I. Usoskin, Natural Sources of Ionization and Their Impact on Atmospheric Electricity, Geophys. Res. Lett., 47, e2020GL088619, 2020. doi: 10.1029/2020GL088619
    75. Usoskin, I.G., S.A. Koldobskiy, G.A. Kovaltsov, E.V. Rozanov, T.V. Sukhodolov, A.L. Mishev, I.A. Mironova, Revisited Reference Solar Proton Event of 23 February 1956: Assessment of the Cosmogenic-Isotope Method Sensitivity to Extreme Solar Events, J. Geophys. Res., 125, e2020JA027921. Doi: 10.1029/2020JA027921.
    76. M. Aguilar et al. (AMS Collaboration), Properties of Neon, Magnesium, and Silicon Primary Cosmic Rays Results from the Alpha Magnetic Spectrometer, Phys. Rev. Lett. 124, 211102, 2020, doi; 10.1103/PhysRevLett.124.211102.
    77. Mishev, A.L., I.G. Usoskin, Current status and possible extension of the global neutron monitor network (Strategic and programming article), J. Space Weather Space Clim. 10, 17, 2020, doi: 10.1051/swsc/2020020.
    78. Mishev, A.L., S.A. Koldobskiy, G.A. Kovaltsov, A. Gil, I.G. Usoskin, Updated Neutron-Monitor Yield Function: Bridging Between In Situ and Ground-Based Cosmic Ray Measurements, J. Geophys. Res. Space Phys., 125, e2019JA027433, 2020, doi: 10.1029/2019JA027433
    79. Huang, X., I. Usoskin, L.Y. Zhang, H.N. Wang, Big Data Processing and Modeling in Solar Physics, Adv. Astron., 2020, 6967925, 2020, doi: 10.1155/2020/6967925.
    80. Kocharov, L., M. Pesce-Rollins, T. Laitinen, A. Mishev, P. Kühl, A. Klassen, M. Jin, N. Omodei, F. Longo, D.F. Webb, H.V. Cane, B. Heber, R. Vainio, and I. Usoskin, Interplanetary Protons versus Interacting Protons in the 2017 September 10 Solar Eruptive Event, Astrophys. J., 890, 13, 2020, doi: 10.3847/1538-4357/ab684e
    81. Frick, P., D. Sokoloff, R. Stepanov, V. Pipin and I. Usoskin, Spectral characteristic of mid-term quasi-periodicities in sunspot data, Mon. Not. R. Astron. Soc., 491, 5572–5578, 2020, doi: 10.1093/mnras/stz32388

      2019

    82. Aguilar et al. (AMS Collaboration). Properties of Cosmic Helium Isotopes Measured by the Alpha magnetic spectrometer, Phys. Rev.Lett. 123, 181102, 2019, doi: 10.1103/PhysRevLett.123.181102.
    83. Koldobskiy, S.A., G.A. Kovaltsov, A.L. Mishev, I.G. Usoskin, New Method of Assessment of the Integral Fluence of Solar Energetic (>1 GV Rigidity) Particles from Neutron Monitor Data, Sol. Phys., 294:, 94, 2019. doi: 10.1007/s11207-019-1485-8
    84. Mishev, A., I. Usoskin, S. Tuohino and A. Ibragimov, The upgraded GLE database includes assessment of radiation exposure at flight altitudes,J. Phys.: Conf. Series, 1181, 012061, 2019, doi: 10.1088/1742-6596/1181/1/012061.
    85. Pevtsov, A., E. Griffin, J. Grindlay, S. Kafka, J. Bartlett, I. Usoskin, K. Mursula, S. Gibson, V. Pillet, J. Burkepile, D. Webb, F. Clette, J. Hesser, Historical astronomical data: urgent need for preservation, digitization enabling scientific exploration, Bull. Amer. Astron. Soc., 51, 190, 2019.
    86. Koldobsky, S., V. Bindi, C. Corti, G. Kovaltsov, I. Usoskin, Validation of the Neutron Monitor Yield Function Using Data From AMS-02 Experiment, 2011-2017, J. Geophys. Res. (Space Phys.), 124, 2367-2379, 2019. doi: /10.1029/2018JA026340
    87. Vaisanen, P., I.G. Usoskin, K. Mursula, Long-Term and Solar Cycle Variation of Galactic Cosmic Rays: Evidence for Variable Heliospheric Turbulence, J. Geophys. Res. (Space Phys.), 124, 804-811, 2019, doi: 10.1029/2018JA026135
    88. Jiggens, P., C. Clavie, H. Evans, et al., In situ data and effect correlation during September 2017 solar particle event, Space Weather, 17, 99-117, 2019, doi: 10.1029/2018SW001936

      2018

    89. Wu, C.-J., N.A. Krivova1, S.K. Solanki, I.G. Usoskin, Solar total and spectral irradiance reconstruction over the last 9000 years, Astron. Astrophys., 620, A120, 2018, doi: 10.1051/0004-6361/201832956.
    90. Mishev, A.L., I.G. Usoskin, Assessment of the radiation environment at commercial jet-flight altitudes during GLE 72 on 10 September 2017 using neutron monitor data, Space Weather, 16, 1921-1929, 2018, doi: 10.1029/2018SW001946.
    91. Gil, A., G.A. Kovaltsov, V.V. Mikhailov, A. Mishev, S. Poluianov and I.G. Usoskin, An Anisotropic Cosmic-Ray Enhancement Event on 07-June-2015: A Possible Origin, Solar Phys., 293, 154, 2018, doi: 10.1007/s11207-018-1375-5.
    92. Poluianov, S., G.A. Kovaltsov and I.G. Usoskin, Solar energetic particles and galactic cosmic rays over millions of years as inferred from data on cosmogenic ^{26}Al in lunar samples, Astron. Astrophys., 618, A96, 2018, doi: 10.1051/0004-6361/201833561
    93. Mishev, A., S. Tuohino, I.G. Usoskin, Neutron monitor count rate increase as a proxy for dose rate assessment at aviation altitudes during GLEs, J. Space Weath. Space Clim., 8, A46, 2018. doi: 10.1051/swsc/2018032
    94. Mishev, A., I. Usoskin, O. Raukunen, M. Paassilta, E. Valtonen, L. Kocharov, R. Vainio, First Analysis of Ground-Level Enhancement (GLE) 72 on 10 September 2017: Spectral and Anisotropy Characteristics, Solar Phys., 293, 136, 2018, doi: 10.1007/s11207-018-1354-x
    95. Uusitalo, J. L. Arppe, T. Hackman, S. Helama, G. Kovaltsov, K. Mielikainen, H. Makinen, P. Nojd, V. Palonen, I. Usoskin, M. Oinonen, Solar superstorm of AD 774 recorded subannually by Arctic tree rings, Nature Comm., 9, 3495, 2018, doi: 10.1038/s41467-018-05883-1
    96. Kocharov, L., S. Pohjolainen, M.J. Reiner, A. Mishev, H. Wang, I. Usoskin, R. Vainio, Spatial Organization of Seven Extreme Solar Energetic Particle Events, Astrophys. J. Lett., 862, L20, 2018. doi: 10.3847/2041-8213/aad18d
    97. Usoskin, I.G., Comment on the paper by Popova et al. “On a role of quadruple component of magnetic field in defining solar activity in grand cycles”, J. Atmos. Solar-Terr. Phys., 176, 69-71, 2018, doi: 10.1016/j.jastp.2017.09.018
    98. Koldobskiy, S.A., G.A. Kovaltsov, I.G. Usoskin, Effective rigidity of a polar neutron monitor for recording Ground-level enhancements, Solar Phys., 293, 110, 2018, doi: 10.1007/s11207-018-1326-1
    99. Koldobskiy, S.A., G.A. Kovaltsov, I.G. Usoskin, A solar cycle of cosmic ray fluxes for 2006-2014: Comparison between PAMELA and neutron monitors, J. Geophys. Res. Space Phys., 123, 4479-4487, 2018. doi: 10.1029/2018JA025516.
    100. Wu, C.-J., I. G. Usoskin, N. Krivova, G.A. Kovaltsov, M. Baroni, E. Bard, S.K. Solanki, Solar activity over nine millennia: A consistent multi-proxy reconstruction, Astron. Astrophys., 615, A93, 2018. doi: 10.1051/0004-6361/201731892
    101. Egorova, T., W. Schmutz, E. Rozanov, A.I. Shapiro, I. Usoskin, et al., Revised historical solar irradiance forcing, Astron. Astrophys., 615, A85, 2018. doi: 10.1051/0004-6361/201731199
    102. Tuohino, S., A. Ibragimov, I. Usoskin, A. Mishev, Upgrade of GLE database: Assessment of effective dose rate at flight altitude, Adv. Space Res., 62, 398-407, 2018, doi: 10.1016/j.asr.2018.04.021
    103. Willamo, T., I.G. Usoskin, G.A. Kovaltsov, A Test of the Active-Day Fraction Method of Sunspot Group Number Calibration: Dependence on the Level of Solar Activity, Solar Phys., 293, 69. 2018, doi: 10.1007/s11207-018-1292-7
    104. Katsova, M.M., L.L. Kitchatinov, M.A. Livshits, D.L. Moss, D.D Sokoloff, I.G. Usoskin, Can Superflares Occur on the Sun? A View from Dynamo Theory, Astron. Rep., 62, 72-80, 2018, doi: 10.1134/S106377291801002X
    105. Acero, F.G., M. C. Gallego, J. A. García, I. G. Usoskin, and J. M. Vaquero, Extreme Value Theory Applied to the Millennial Sunspot Number Series, Astrophys. J., 853, 80, 2018, doi: 10.3847/1538-4357/aaa406

      2017

    106. Vaisanen, P., I. Usoskin, K. Mursula, Structure of the Power Spectral Density of Galactic Cosmic Ray Variation during 1953-2016, in: Space Weather of the Heliosphere: Processes and Forecasts, Procs IAU Symp No. 335, (eds. C. Foullon O.E. Malandraki), 82-86, 2017. doi: 10.1017/S1743921317010122.
    107. Owens M.J., M. Lockwood, E. Hawkins, I. Usoskin, G.S. Jones, L. Barnard, A. Schurer, J. Fasullo, The Maunder minimum and the Little Ice Age: an update from recent reconstructions and climate simulations, J. Space Weather Space Clim. 7, A33, 2017, doi: 10.1051/swsc/2017034
    108. Asvestari, E., A. Gil, G.A. Kovaltsov, I.G. Usoskin, Neutron Monitors and Cosmogenic Isotopes as Cosmic Ray Energy-Integration Detectors: Effective Yield Functions, Effective Energy, and Its Dependence on the Local Interstellar Spectrum, J. Geophys. Res. Space Phys., 120, 9790-9802, 2017, doi: 10.1002/2017JA024469 with Supplement information.
    109. Poluianov, S.V., I.G. Usoskin, A.L. Mishev, M.A. Shea, D.F. Smart, GLE and Sub-GLE Redefinition in the Light of High-Altitude Polar Neutron Monitors, Solar Phys., 292, 176, 2017, doi: 10.1007/s11207-017-1202-4
    110. Jungclaus, J.H., E. Bard, M. Baroni, et al., The PMIP4 contribution to CMIP6 - Part 3: The last millennium, scientific objective, and experimental design for the PMIP4 past1000 simulations, Geosci. Model Dev., 10, 4005-4033, 2017. doi: 10.5194/gmd-10-4005-2017
    111. Mishev, A., S. Poluianov, I. Usoskin, Assessment of spectral and angular characteristics of sub-GLE events using the global neutron monitor network, Space Weather Space Clim., 7, A28, 2017, doi: 10.1051/swsc/2017026
    112. Asvestari. E., T. Willamo, A. Gil, I.G. Usoskin, G.A. Kovaltsov, V.V. Mikhailov, A. Mayorov, Analysis of Ground Level Enhancements (GLE): Extreme solar energetic particle events have hard spectra, Adv. Space Res., 60, 781-787, 2017. doi: 10.1016/j.asr.2016.08.043.
    113. Matthes, K., B. Funke, M.E. Andersson, et al., Solar forcing for CMIP6 (v3.2), Geosci. Model Dev., 10, 2247-2302, 2017, doi: 10.5194/gmd-10-2247-2017.
    114. Chatzistergos, T., I.G. Usoskin, G.A. Kovaltsov, N.A. Krivova and S.K. Solanki, New reconstruction of the sunspot group numbers since 1739 using direct calibration and "backbone" methods, Astron. Astrophys., 602, A69, 2017, doi: 10.1051/0004-6361/201630045
    115. Usoskin, I.G., A. Gil, G.A. Kovaltsov, A. Mishev, V.V. Mikhailov, Heliospheric modulation of cosmic rays during the neutron monitor era: Calibration using PAMELA data for 2006-2010, J. Geophys. Res. Space Phys., 122, 3875-3887, 2017, doi: 10.1002/2016JA023819
    116. Willamo, T., I.G. Usoskin, G. A. Kovaltsov, Updated sunspot group number reconstruction for 1749-1996 using the active day fraction method, Astron, Astrophys., 601, A109, 2017, doi: 10.1051/0004-6361/201629839
    117. Kocharov, L., S. Pohjolainen, A. Mishev, M.J. Reiner, J. Lee, T. Laitinen, L.V. Didkovsky, V.J. Pizzo, R. Kim, A. Klassen, M. Karlicky, K. Cho, D.E. Gary, I. Usoskin, E. Valtonen and R. Vainio, Investigating the Origins of Two Extreme Solar Particle Events: Proton Source Profile and Associated Electromagnetic Emissions, Astrophys. J., 839, 79, 2016, doi: 10.3847/1538-4357/aa6a13.
    118. Sukhodolov, T. I.G. Usoskin, E. Rozanov, E. Asvestari, W.T. Ball, M.A.J. Curran, H. Fischer, G. Kovaltsov, F. Miyake, T. Peter, C. Plummer, W. Schmutz, M. Severi, R. Traversi, Atmospheric impacts of the strongest known solar particle storm of 775 AD, Sci. Rep., 7, 45257, 2017. doi: 10.1038/srep45257.
    119. Lockwood, M., M. Owens, E. Hawkins, G.S. Jones and I.G. Usoskin, Frost fairs, sunspots and the Little Ice Age, Astron. Geophys., 58, 2.17-2.23, 2017, doi: 10.1093/astrogeo/atx057
    120. Usoskin, I.G. A history of solar activity over millennia, Living Rev. Sol. Phys. 14, 3, 2017 doi:10.1007/s41116-017-0006-9
    121. Leussu, R., I.G. Usoskin, V. Senthamizh Pavai, A. Diercke, R. Arlt, C. Denker, K. Mursula, Wings of the butterfly: Sunspot groups for 1826--2015, Astron. Astrophys., 599, A131, 2017, doi: 10.1051/0004-6361/201629533.
    122. Asvestari, E., I.G. Usoskin, G.A. Kovaltsov, M.J. Owens, N.A. Krivova, S. Rubinetti, C. Taricco, Assessment of different sunspot number series using the cosmogenic isotope 44Ti in meteorites, Mon. Not. Royal. Astron. Soc., 467, 1608-1613, 2017, doi: 10.1093/mnras/stx190.
    123. Usoskin, I.G., G.A. Kovaltsov, L.N. Mishina, D.D. Sokoloff, J. Vaquero, An Optical Atmospheric Phenomenon Observed in 1670 over the City of Astrakhan Was Not a Mid-Latitude Aurora, Solar Phys., 292, 15, 2017 (doi: 10.1007/s11207-016-1035-6).

      2016

    124. Usoskin, I.G., U G.A. Kovaltsov, T. Chatzistergos, Dependence of the Sunspot-Group Size on the Level of Solar Activity and its Influence on the Calibration of Solar Observers, Solar Phys., 291, 3793-3805, 2016, doi: 10.1007/s11207-016-0993-z.
    125. Usoskin, I.G., G.A. Kovaltsov, M. Lockwood, K. Mursula, M. Owens, S.K. Solanki, A New Calibrated Sunspot Group Series Since 1749: Statistics of Active Day Fractions, Solar Phys., 291, 2685-2708, 2016, doi: 10.1007/s11207-015-0838-1.
    126. Lockwood, M., M.J. Owens, L. Barnard, I.G. Usoskin, Tests of Sunspot Number Sequences: 3. Effects of Regression Procedures on the Calibration of Historic Sunspot Data, Solar Phys., 291, 2829-2841, 2016, doi: 10.1007/s11207-015-0829-2.
    127. Lockwood, M., M.J. Owens, L. Barnard, C.J. Scott, I.G. Usoskin, H. Nevanlinna, Tests of Sunspot Number Sequences: 2. Using Geomagnetic and Auroral Data, Solar Phys., 291, 2811-2828, 2016, doi: 10.1007/s11207-016-0913-2.
    128. Artamonov, A., A. Mishev, I.G. Usoskin, Atmospheric ionization induced by precipitating electrons: Comparison of CRAC:EPII model with a parametrization model, J. Atmos. Solar-Terr. Phys. 149, 161-166, 2016, doi:10.1016/j.jastp.2016.04.020
    129. Yaniv, R., Y. Yair, C. Price, K. Nicoll, G. Harrison, A. Artamonov, I. Usoskin, Balloon measurements of the vertical ionization profile over southern Israel and comparison to mid-latitude observations, J. Atm. Solar-Terr. Phys., 149, 87-92, 2016, doi: 10.1016/j.jastp.2016.10.003
    130. Leussu, R., I.G. Usoskin, R. Arlt, K. Mursula, Properties of sunspot cycles and hemispheric wings since the 19th century, Astron. Astrophys., 592, A160, 2016, doi: 10.1051/0004-6361/201628335.
    131. Poluianov, S.V., G.A. Kovaltsov, A.L. Mishev and I.G. Usoskin, Production of cosmogenic isotopes 7Be, 10Be, 14C, 22Na, and 36Cl in the atmosphere: Altitudinal profiles of yield functions, J. Geophys. Res. Atmos., 121, 8125-8136, 2016, doi:10.1002/2016JD025034. and the Supplement information.
    132. Owens, M.J., E. Cliver, K. G. McCracken, J. Beer, L. Barnard, M. Lockwood, A. Rouillard, D. Passos, P. Riley, I. Usoskin, and Y-M. Wang, Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions, J. Geophys. Res., 121, 6048-6063, doi:10.1002/2016JA022529.
    133. Owens, M.J., E. Cliver, K. G. McCracken, J. Beer, L. Barnard, M. Lockwood, A. Rouillard, D. Passos, P. Riley, I. Usoskin, and Y-M. Wang, Near-Earth heliospheric magnetic field intensity since 1750: 2. Cosmogenic radionuclide reconstructions, J. Geophys. Res., 121, 6064-6074, doi:10.1002/2016JA022550.
    134. Lockwood, M., M. J. Owens, L. Barnard, and I. G. Usoskin, An assessment of sunspot number data composites over 1845-2014, Astrophys. J., 824, 54, 2016, doi:10.3847/0004-637X/824/1/54
    135. Mishev, A.L., I. G. Usoskin, Analysis of the Ground-Level Enhancements on 14 July 2000 and 13 December 2006 Using Neutron Monitor Data, Solar Physics, 291, 1225-1239, 2016, doi: 10.1007/s11207-016-0877-2. with erratum.
    136. Artamonov, A.A., A. L. Mishev, I. G. Usoskin, Model CRAC:EPII for atmospheric ionization due to precipitating electrons: Yield function and applications, J. Geophys. Res., 121, 1736-1743, doi: 10.1002/2015JA022276, 2016.
    137. Usoskin, I.G., Y. Gallet, F. Lopes, G. A. Kovaltsov, G. Hulot, Solar activity during the Holocene: the Hallstatt cycle and its consequence for grand minima and maxima, Astron. Astrophys., 587, A150, 2016, (doi: 10.1051/0004-6361/201527295).
    138. Asvestari, E. and I.G. Usoskin, An empirical model of heliospheric cosmic ray modulation on long-term time scale. J. Space Weather Space Clim., 6, A15, 2016, (doi: 10.1051/swsc/2016011)
    139. Artamonov, A.A., G. A. Kovaltsov, A. L. Mishev, I. G. Usoskin, Neutron monitor yield function for solar neutrons: A new computation, J. Geophys. Res., 121, 117-128, 2016 (doi: 10.1002/2015JA021993).
    140. Traversi, R., S. Becagli, S. Poluianov, M. Severi, S.K. Solanki, I.G. Usoskin and R. Udisti, The Laschamp geomagnetic excursion featured in nitrate record from EPICA-Dome C ice core, Sci. Rep., 6, 20235, 2016 (doi: 10.1038/srep20235)

      2015

    141. Poluianov, S., I. Usoskin, A. Mishev, H. Moraal, H. Kruger, G. Casasanta, R. Traversi, R. Udisti, Mini Neutron Monitors at Concordia Research Station, Central Antarctica, J. Astron. Space Sci., 32, 281-284, 2015 doi: 10.5140/JASS.2015.32.4.281.
    142. Mironova, I.A., K.L. Aplin, F. Arnold, G.A. Bazilevskaya, R.G. Harrison, A.A. Krivolutsky, K.A. Nicoll, E.V. Rozanov, E. Turunen, I.G. Usoskin, Energetic Particle Influence on the Earth's Atmosphere, Space Sci. Rev., 194, 1-96. 2015, doi: 10.1007/s11214-015-0185-4.
    143. Gil, A., I.G. Usoskin, G.A. Kovaltsov, A. Mishev, C. Corti, V. Bindi, Can we properly model the neutron monitor count rate? J. Geophys. Res., 120, 7172-7178, 2015, doi: 10.1002/2015JA021654
    144. Usoskin, I.G., G.A. Kovaltsov, The carbon-14 spike in the 8th century was not caused by a cometary impact on Earth, Icarus, 260, 475-476, 2015
    145. Kocharov, L.G., A. Klassen, E. Valtonen, I. Usoskin, and J.M. Ryan, Comparative morphology of solar relativistic particle events, Astrophys. J. Lett., 811, L9, 2015, doi: :10.1088/2041-8205/811/1/L9.
    146. Usoskin, I.G., R. Arlt, E. Asvestari et al., The Maunder minimum (1645-1715) was indeed a grand minimum: A reassessment of multiple datasets, Astron. Astrophys., 581, A95, 2015 doi: 10. 1051/0004-6361/201526652
    147. Zaqarashvili, T.V., R. Oliver, A. Hanslmeier, M. Carbonell, J.L. Ballester, T. Gachechiladze, I.G. Usoskin, Long-term variation in the Sun's activity caused by magnetic Rossby waves in the tachocline, Astrophys. J. Lett., 805, L14, 2015, doi: :10.1088/2041-8205/805/2/L14.
    148. Mishev, A.L., I.G. Usoskin, Numerical model for computation of effective and ambient dose equivalent at flight altitudes: Application for dose assessment during GLEs, Space Weather Space Clim., 5, A10, 2015, doi: /10.1051/swsc/2015011
    149. Melott, A.L., I.G. Usoskin, G.A. Kovaltsov, C.M. Laird, Has the Earth been exposed to numerous supernovae within the last 300 kyr? Internat. J. Astrobiol., 14, 375-378, 2015.
    150. Fournier, A., Y. Gallet, I. Usoskin, P.W. Livermore, G.A. Kovaltsov, The impact of geomagnetic spikes on the production rates of cosmogenic 14C and 10Be in the Earth's atmosphere, Geophys. Res. Lett., 42, 2759-2766, 2015.
    151. Pacini, A. A., I.G. Usoskin, K. Mursula, E. Echer, H. Evangelista, Signature of a sudden stratospheric warming in the near-ground 7Be flux, Atmos. Envir., 113, 27-31, 2015.
    152. Vaquero, J.M., G. A. Kovaltsov, I.G. Usoskin, V. M. S. Carrasco, and M. C. Gallego, Level and length of cyclic solar activity during the Maunder minimum as deduced from the active-day statistics, Astron. Astrophys., 577, A71, 2015.
    153. Usoskin, I.G., G.A. Kovaltsov, O. Adriani et al., Force-field parameterization of the galactic cosmic ray spectrum: Validation for Forbush decreases, Adv. Space Res., 55, 2940-2945, 2015.
    154. Riley, P. et al., Inferring the structure of the solar corona and inner heliosphere during the Maunder minimum using global thermodynamic magnetohydrodynamic simulations, Astrophys. J., 802, 105, 2015.
    155. Pacini, A.A., I.G. Usoskin, An Unusual Pattern of Cosmic-Ray Modulation During Solar Cycles 23 and 24, Solar Phys., 290, 943-950, 2015.
    156. Zhang, L., K. Mursula, and I. Usoskin, Solar surface rotation: N-S asymmetry and recent speed-up, Astron. Astrophys. Lett., 572, L2, 2015.
    157. Mishev, A.L., F. Adibpour, I.G. Usoskin, E. Felsberger, Computation of dose rate at flight altitudes during ground level enhancements no. 69, 70 and 71, Adv. Space Res., 55, 354-362, 2015.

      2014

    158. Bazilevskaya, G.A., E.W. Cliver, G.A. Kovaltsov, A.G. Ling, M.A. Shea, D.F. Smart, I.G. Usoskin, Solar Cycle in the Heliosphere and Cosmic Rays, Space Sci. Rev., 186, 409-435, 2014.
    159. Kovaltsov, G.A., I.G. Usoskin, E. W. Cliver, W. F. Dietrich, A. J. Tylka, Fluence ordering of solar energetic proton events using cosmogenic radionuclide data, Solar Phys., 289, 4691, 2014
    160. Poluianov, S.V., I.G. Usoskin, G.A. Kovaltsov, Cosmogenic isotope variability during the Maunder minimum: Normal 11-year cycles are expected, Solar Phys., 289, 4701, 2014
    161. Poluianov, S., R. Traversi, I. Usoskin, Cosmogenic production and climate contributions to nitrate record in the TALDICE Antarctic ice core, J. Atm. Solar-Terr. Phys., 121, 50-58, 2014.
    162. Sturevik-Storm, A., A. Aldahan, G. Possnert, A.-M. Berggren, R. Muscheler, D. Dahl-Jensen, B.M. Vinther, I. Usoskin, 10Be climate fingerprints during the Eemian in the NEEM ice core, Greenland, Sci. Rep., 4, 6408, 2014.
    163. Agueda, N., et al., Release timescales of solar energetic particles in the low corona, Astron. Astrophys., 570, A5, 2014.
    164. Kocharov, L., T. Laitinen, I. Usoskin and R. Vainio, Transmission and emission of solar energetic particles in semi-transparent shocks, Astrophys. J. Lett., 787, L21, 2014.
    165. Soon, W., V.M. Velasco Herrera, K. Selvaraj, R. Traversi, I. Usoskin, Ch.-T. Chen, J.-Y. Lou, Sh.-J. Kao, R.M. Carter, V. Pipin, M. Severi, S. Becagli, A review of Holocene solar-linked climatic variation on centennial to millennial timescales: Physical processes, interpretative frameworks and a new multiple cross-wavelet transform algorithm, Earth Sci. Rev., 134, 1-15, 2014.
    166. Mishev, A.V, L.G. Kocharov and I.G. Usoskin, Analysis of the ground level enhancement on 17 May 2012 using data from the global neutron monitor network, J. Geophys. Res., 119, 670-679, 2014.
    167. Usoskin, I.G., G. Hulot, Y. Gallet, R. Roth, A. Licht, F. Joos, G. A. Kovaltsov, E. Thebault and A. Khokhlov, Evidence for distinct modes of solar activity, Astron. Astrophys., 562, L10, 2014.
    168. Poluianov, S., I.G. Usoskin, Critical Analysis of a Hypothesis of the Planetary Tidal Influence on Solar Activity, Solar Phys., 289, 2333-2342, 2014.
    169. Mironova, I.A., I.G. Usoskin, Possible effect of strong solar energetic particle events on polar stratospheric aerosol: a summary of observational results, Environ. Res. Lett., 9, 015002, 2014.
    170. Kovaltsov, G.A., I.G.Usoskin, Occurrence Probability of Large Solar Energetic Particle Events: Assessment from Data on Cosmogenic Radionuclides in Lunar Rocks, Solar Phys., 289, 211-220, 2014.

      2013

    171. Voiculescu, M., I.G. Usoskin, S. Condurache-Bota, Clouds blown by the solar wind, Environ. Res. Lett., 8, 045032, 2013.
    172. Leussu, R., I.G. Usoskin, R. Arlt and K. Mursula, Inconsistency of the Wolf sunspot number series around 1848, Astron. Astrophys., 559, A28, 2013.
    173. Calisto, M., I. Usoskin, E. Rozanov, Influence of a Carrington-like event on the atmospheric chemistry, temperature and dynamics: revised, Envir. Res. Lett., 8, 045010, 2013.
    174. Mironova, I.A. and I.G. Usoskin, Possible effect of extreme solar energetic particle events of September-October 1989 on polar stratospheric aerosols: a case study, Atmos. Chem. Phys., 13, 8543-8550, 2013.
    175. Arlt, R., R. Leussu, N. Giese, K. Mursula, I.G. Usoskin, Sunspot positions and sizes for 1825-1867 from the observations by Samuel Heinrich Schwabe, Mon. Not. R. Astron. Soc., 433, 3165-3172, 2013.
    176. Mishev, A., I.G. Usoskin, G.A. Kovaltsov, Neutron monitor yield function: New improved computations, J. Geophys. Res., 118, 783-2788, 2013. (with Erratum)
    177. Nevalainen, J., I.G. Usoskin, and A. Mishev, Eccentric dipole approximation of the geomagnetic field: Application to cosmic ray computations, J. Adv. Space Res., 52, 22-29, 2013.
    178. Usoskin, I.G., A History of Solar Activity over Millennia, Living. Rev. Solar Phys., 10, 1, 2013.
    179. Usoskin, I.G., B. Kromer, F. Ludlow, J. Beer, M. Friedrich, G. A. Kovaltsov, S.K. Solanki and L. Wacker, The AD775 cosmic event revisited: the Sun is to blame, Astron. Astrophys. Lett., 552, L3, 2013.
    180. Zhang, L., K. Mursula, and I. Usoskin, Consistent long-term variation in the hemispheric asymmetry of solar rotation, Astron. Astrophys., 552, A84, 2013.
    181. Vainio, R., E. Valtonen, B. Heber, et al., The first SEPServer event catalogue ~68-MeV solar proton events observed at 1 AU in 1996-2010, J. Space Weather Space Clim., 3, A12, 2013.
    182. Gopalswamy, N., H. Xie, S. Akiyama, S. Yashiro, I. G. Usoskin, and J. M. Davila, The First Ground Level Enhancement Event of Solar Cycle 24: Direct Observation of Shock Formation and Particle Release Heights, Astrophys. J. Lett., 765, L30, 2013.
    183. Starodubtsev, S.A., V.G. Grigoryev, I.G. Usoskin, Forecast of the arrival of interplanetary shocks by measuring cosmic ray fluctuations in the interplanetary medium, J. Phys., 409, 012180, 2013.
    184. Mishev, A., I.G. Usoskin, Computations of cosmic ray propagation in the Earth's atmosphere, towards a GLE analysis, J. Phys., 409, 012152, 2013.
    185. Makrantoni, P., H. Mavromichalaki1, I. Usoskin, A. Papaioannou, Calculation of the cosmic ray induced ionization for the region of Athens, J. Phys., 409, 012232, 2013.

      2012

    186. Owens, M.J., I.G. Usoskin, M. Lockwood, Heliospheric modulation of galactic cosmic rays during grand solar minima: Past and future variations, Geophys. Res. Lett., 39, L19102, 2012.
    187. Voiculescu M, and I.G. Usoskin, Persistent solar signatures in cloud cover: spatial and temporal analysis, Environm. Res. Lett., 7, 044004, 2012.
    188. Gopalswamy, N., H. Xie, S. Yashiro, S. Akiyama, P. Makela and I. G. Usoskin, Properties of Ground Level Enhancement Events and the Associated Solar Eruptions During Solar Cycle 23, Space Sci. Rev., 171, 23-60, 2012.
    189. Usoskin, I.G., and G.A. Kovaltsov, Occurrence of Extreme Solar Particle Events: Assessment from Historical Proxy Data, Astrophys. J., 757, 92, 2012.
    190. Schrijver, C.J., J. Beer, U. Baltensperger, E. W. Cliver, M. Güdel, H. S. Hudson, K.G. McCracken, R. A. Osten, T. Peter, D.R. Soderblom, I. G. Usoskin, E. W. Wolff, Estimating the frequency of extremely energetic solar events, based on solar, stellar, lunar, and terrestrial records, J. Geophys. Res., 117, A08103, 2012.
    191. Traversi, R., I.G. Usoskin, S.K. Solanki, S. Becagli, M. Frezzotti, M. Severi, B. Stenni and R. Udisti, Nitrate in Polar Ice: A New Tracer of Solar Variability, Solar Phys., 280, 237-254, 2012..
    192. Usoskin, I.G., Solar Variability, Cosmic Rays and Climate: What's up?, Adv. Space Res., 50, 655, 2012..
    193. Kovaltsov, G.A., A. Mishev and I.G. Usoskin, A new model of cosmogenic production of radiocarbon 14C in the atmosphere, Earth Planet. Sci. Lett., 337, 114-120, 2012..
    194. Pipin, V.V., D.D. Sokoloff and I.G. Usoskin, Variations of the solar cycle profile in a solar dynamo with fluctuating dynamo governing parameters, Astron. Astrophys., 542, A26, 2012..
    195. Mironova, I.A., I.G. Usoskin, G.A. Kovaltsov, and S.V. Petelina, Possible effect of extreme solar energetic particle event of 20 January 2005 on polar stratospheric aerosols: direct observational evidence, Atmos. Chem. Phys., 12, 769-778, 2012.
    196. Leppanen A.P., I.G. Usoskin, G.A. Kovaltsov, J. Paatero, Cosmogenic 7Be and 22Na in Finland: Production, observed periodicities and the connection to climatic phenomena, J. Atmosph. Solar-Terr. Phys., 74, 164-180, 2012.

      2011

    197. Pacini, A.A., I.G. Usoskin, H. Evangelista, E. Echer, R. de Paula, Cosmogenic isotope 7Be: A case study of depositional processes in Rio de Janeiro in 2008-2009, Adv. Space Res., 48, 811-818, 2011.
    198. Vieira, L.E.A., S.K. Solanki, N.A. Krivova, and I.G. Usoskin, Evolution of the solar irradiance during the Holocene, Astron. Astrophys., 531, id:A6, 2011.
    199. Semeniuk, K., V. I. Fomichev, J. C. McConnell, C. Fu, S. M. L. Melo, and I.G. Usoskin, Middle atmosphere response to the solar cycle in irradiance and ionizing particle precipitation, Atmos. Chem. Phys., 11, 5045-5077, 2011.
    200. Calisto, M., I. Usoskin, E. Rozanov, and T. Peter, Influence of Galactic Cosmic Rays on atmospheric composition and dynamics, Atmos. Chem. Phys., 11, 4547, 2011.
    201. Mavromichalaki, H., et al. (34 authors), Applications and usage of the real-time Neutron Monitor Database, Adv. Space. Res., 47, 2210-2222, 2011.
    202. Vaquero, J.M., M.C. Gallego, I.G. Usoskin, G.A. Kovaltsov, Revisited sunspot data: A new scenario for the onset of the Maunder minimum, Astrophys. J. Lett., 731, L24, 2011.
    203. L. Zhang, K. Mursula, I. Usoskin, and H. Wang, Global analysis of active longitudes of sunspots, Astron. Astrophys., 529, A23, 2011.
    204. Usoskin, I.G., G. A. Kovaltsov, I. A. Mironova, A. J. Tylka, and W. F. Dietrich, Ionization effect of solar particle GLE events in low and middle atmosphere, Atmos. Chem. Phys., 11, 1979-1988, 2011.
    205. Usoskin, I.G., G.A. Bazilevskaya, and G.A. Kovaltsov, Solar modulation parameter for cosmic rays since 1936 reconstructed from ground-based neutron monitors and ionization chambers, J. Geophys. Res., 116, A02104, 2011.
    206. Zhang, L., K. Mursula, I. Usoskin, H. Wang, Global analysis of active longitudes of solar X-ray flares, J. Atmos.-Solar Terr. Phys., 73, 258-263, 2011.
    207. Mursula, K., D. Marsh, D. Nandy, I. Usoskin, A review of Space Climate and an introduction to the papers of the JASTP special issue on Space Climate, J. Atmos.-Solar Terr. Phys., 73, 179-181, 2011.

      2010

    208. Gopalswamy, N. , H. Xie, S. Yashiro, I. Usoskin, Ground level enhancement events of Solar cycle 23, Indian J. Radio Space Phys., 39, 240-248, 2010.
    209. Leppanen, A.-P., Pacini, A.A., Usoskin, I.G., Aldahan, A., Echer, E., Evangelista, H., Klemola, S., Kovaltsov, G.A., Mursula, K., Possnert, G., Cosmogenic 7Be in air: A complex mixture of production and transport, J. Atmos. Solar-Terr. Phys., 72, 1036-1043, 2010.
    210. Starodubtsev, S.A., I.G. Usoskin, Fluctuations of Energetic Particle Flux during Solar Cycle Based on Measurements in the Solar Wind, in the Magnetosphere, and at Earth, Astron. Lett., 36, 438-443, 2010.
    211. Usoskin, I. G., G. A. Kovaltsov, and I. A. Mironova, Cosmic ray induced ionization model CRAC:CRII: An extension to the upper atmosphere, J. Geophys. Res., 115, D10302, 2010.
    212. Usoskin, I.G., D. Moss, D. Sokoloff, Solar cycle variations on the millennial time scale: A challenge for solar dynamo theory, Solar Observer, 1, 29-33, 2010.
    213. Kulmala, M., I. Riipinen, T. Nieminen, et al., Atmospheric data over a solar cycle: no connection between galactic cosmic rays and new particle formation, Atmos. Chem. Phys., 10, 1885-1898, 2010.
    214. Kovaltsov, G.A., and I.G. Usoskin, A new 3D numerical model of cosmogenic nuclide 10Be production in the atmosphere, Earth Planet. Sci. Lett., 291, 182-188, 2010.
    215. Usoskin, I.G. and G.A. Kovaltsov, Critical Comment on the Article by R. Rek "The Maunder Minimum and the Sun as the Possible Source of Particles Creating Increased Abundance of the 14C Carbon Isotope", Solar Phys., 261, 353-359, 2010.
    216. R.G. Harrison and I.G. Usoskin, Solar modulation in surface atmospheric electricity, J. Atmos. Solar-Terr. Phys., 72, 176–182, 2010.
    217. Usoskin, I.G., I.A. Mironova, M. Korte, G.A. Kovaltsov Regional millennial trend in the cosmic ray induced ionization of the troposphere, J. Atmos. Solar-Terr. Phys., 72, 19-25, 2010

      2009

    218. Usoskin, I.G., E. Valtonen, R. Vainio, P. Tanskanen, A.M. Aurela, History of cosmic ray research in Finland, Adv. Space Res., 44, 1232-1236, 2009.
    219. Vainio et al., Dynamics of the Earth’s Particle Radiation Environment, Space Sci. Rev., 147, 187-231, 2009.(invited review)
    220. Enqvist, T., L. Bezrukov, H. Fynbo, E. Heikkila, L. Inzhechik, J. Joutsenvaara, P. Jones, T. Jamsen, T. Kalliokoski, P. Keranen, K. Kolos, P. Kuusiniemi, B. Lubsandorzhiev, L. Olantera, V. Petkov, T. Raiha, J. Sarkamo, W. Trzaska and I. Usoskin, EMMA - an underground cosmic-ray experiment, Nucl. Phys. B Proc. Suppl., 196, 255-258, 2009.
    221. Mursula, K., I.G. Usoskin, O. Yakovchuk, Does sunspot number calibration by the "magnetic needle" make sense? J. Atmos. Solar-Terr. Phys., 17, 1717-1726, 2009.
    222. Usoskin, I.G., K. Mursula, R. Arlt, G.A. Kovaltsov, A solar cycle lost in 1793-1800: Early sunspot observations resolve the old mystery, Astrophys. J. Lett., 700, L154, 2009.
    223. Voiculescu, M., I.G. Usoskin, L.P. Geogrescu, Are some clouds obscured in satellite view? Roman. J. Phys., 54, 225-229, 2009.
    224. Usoskin, I.G., K. Horiuchi, S. Solanki, G.A. Kovaltsov, E. Bard, On the common solar signal in different cosmogenic isotope data sets, J. Geophys. Res., 114, A03112, 2009.
    225. Usoskin, I.G., C.V. Field, G.A. Schmidt, A.-P. Leppanen, A. Aldahan, G.A. Kovaltsov, G. Possnert, R. Ungar, Short term production and synoptic influences on atmospheric 7Be concentrations, J. Geophys. Res. 114, D06108, 2009.
    226. Usoskin, I.G., D. Sokoloff and D. Moss, Grand Minima of solar activity and the mean-field dynamo, Solar Phys, 254, 345-355, 2009.
    227. Alanko-Huotari, K., I.G. Usoskin, K. Mursula, G.A. Kovaltsov, Correction to "Stochastic simulation of cosmic ray modulation including a wavy heliospheric current sheet", J. Geophys. Res., 114, A03101, 2009.
    228. Usoskin, I.G., L. Desorgher, P. Velinov, M. Storini, E. O. Flueckiger, R. Buetikofer and G.A. Kovaltsov, Ionization of the Earth's atmosphere by solar and galactic cosmic rays, Acta Geophys., 57, 88-101, 2009.

      2008

    229. I. Usoskin, History of Solar Activity over Millennia, Living Rev. Solar Phys., 5, 3, 2008 (invited review)
    230. Mironova, I.A., L. Desorgher, I.G. Usoskin, E.O. Flückiger, and R. Bütikofer, Variations of aerosol optical properties during the extreme solar event in January 2005, Geophys. Res. Lett., 35, L18610, 2008.
    231. Bazilevskaya, G.A., I.G. Usoskin, E. O. Flueckiger, R. G. Harrison, L. Desorgher, R. Buetikofer, M. B. Krainev, V.S. Makhmutov, Y.I. Stozhkov, A.K. Svirzhevskaya, N.S. Svirzhevsky and G.A. Kovaltsov, Cosmic Ray Induced Ion Production in the Atmosphere, Space Sci. Rev., 137, 149-173, 2008.
    232. Moss, D., D. Sokoloff, I. Usoskin, V. Tutubalin, Solar Grand Minima and Random Fluctuations in Dynamo Parameters, Solar Phys., 250, 221-234, 2008.
    233. Usoskin, I.G., G.A. Kovaltsov, Cosmic rays and climate of Earth: Possible connection, Compt. Rend. Geosci., 340. 441-450, 2008 (invited review).
    234. Usoskin, I.G., I. Braun, O.G. Gladysheva, J.R. Hoerandel, T. Jamsen, G.A. Kovaltsov, and S.A. Starodubtsev, Forbush decreases of cosmic rays: Energy dependence of the recovery phase, J. Geophys. Res., 113, A07102, 2008.
    235. Usoskin, I., and Kovaltsov, G.A., Production of cosmogenic 7Be isotope in the atmosphere: Full 3-D modeling, J. Geophys. Res., 113, D12107, 2008.
    236. Usoskin, I.G., M. Korte, and G.A. Kovaltsov, Role of centennial geomagnetic changes in local atmospheric ionization, Geophys. Res. Lett., 35, L05811, 2008.
    237. Grigoryev, A.V., S.A. Starodubtsev, V.G. Grigoryev, I.G. Usoskin, K. Mursula, Fluctuations of cosmic rays and IMF in the vicinity of interplanetary shocks, Adv. Space Res., 41, 955-961, 2008.
    238. Enqvist, T., J. Joutsenvaara, T. Jamsen, P. Keranen, P. Kuusiniemi, M. Lehtola, A. Mattila, J. Narkilahti, J. Peltoniemi, A. Pennanen, T. Raiha, J. Sarkamo, C. Shen, W. Trzaska, I. Usoskin, M. Vaittinen, and Z. Zhang, EMMA - a new underground cosmic-ray experiment, Nucl. Phys. B Proc. Suppl., 175, 307-310, 2008.

      2007

    239. Alanko-Huotari, K., I.G. Usoskin, K. Mursula, and G.A. Kovaltsov, Cyclic variations of the heliospheric tilt angle and cosmic ray modulation, Adv. Space Res., 40, 1064-1069, 2007.
    240. Usoskin, I.G., S.V. Berdyugina, D. Moss, D.D. Sokoloff, Long-term persistence of solar active longitudes and its implications for the solar dynamo theory, Adv. Space Res., 40, 951-958, 2007
    241. Voiculescu, M., I.G. Usoskin, and K. Mursula, Effect of ENSO and volcanic events on the Sun-cloud link, Adv. Space Res., 40, 1140-1145, 2007.
    242. Starodubtsev, S.A., A.V. Grigor'ev, V.G. Grigor'ev, I.G. Usoskin, K. Mursula, Fluctuations of Cosmic Rays and Interplanetary Magnetic Field in the Vicinity of Interplanetary Shock Fronts, Bull. Russian Acad. Sci: Phys., 71, 991-993, 2007.
    243. Mursula, K., I.G. Usoskin, G. Maris, Introduction to Space Climate, J. Adv. Space Res., 40, 885-887, 2007.
    244. Kovaltsov, G.A., Usoskin, I.G., Regional cosmic ray induced ionization and geomagnetic field changes, Adv. Geosci., 13, 31-35, 2007.
    245. Jamsen, T., I.G. Usoskin, T. Raiha, J. Sarkamo, G.A. Kovaltsov, Case study of Forbush decreases: Energy dependence of the recovery, Adv. Space Res., 40, 342-347, 2007.
    246. Alanko-Huotari, K., I. G. Usoskin, K. Mursula, and G. A. Kovaltsov, Stochastic simulation of cosmic ray modulation including a wavy heliospheric current sheet, J. Geophys. Res., 112, A08101, 2007.
    247. I.G. Usoskin, S.K. Solanki, G.A. Kovaltsov, Grand minima and maxima of solar activity: new observational constraints, Astron. Astrophys., 471, 301-309, 2007.
    248. Enqvist, T., J. Joutsenvaara, T. Jamsen, et al., Underground cosmic-ray experiment EMMA, Nucl. Phys. B Proc. Suppl., 165, 349-354, 2007.
    249. I.G. Usoskin, S.V. Berdyugina, J. Poutanen, Erratum: (1) Preferred longitudes in sunspot activity (2) Preferred sunspot longitudes: non-axisymmetry and differential rotation Astron. Astrophys., 464, 761-761, 2007.

      2006

    250. Alanko-Huotari, K., I.G. Usoskin, K. Mursula, and G.A. Kovaltsov, Global heliospheric parameters and cosmic ray modulation: an empirical relation for the last decades, Solar Physics, 238, 391-404, 2006.
    251. Damtie, B., T. Bosinger, I.G. Usoskin, Establishing a cosmic ray station and other space research facilities in Ethiopia, African Skies, 10, 29-32, 2006..
    252. de Jager, C., and I.G. Usoskin, On possible drivers of Sun-induced climate changes, J. Atm. Solar-Terr. Phys., 68, 2053-2060, 2006..
    253. I.G. Usoskin,, M. Voiculescu, G.A. Kovaltsov, and K. Mursula, Correlation between clouds at different altitudes and solar activity: Fact or Artifact? J. Atmosph. Solar-Terr. Phys., 68, 2164-2172, 2006..
    254. I.G. Usoskin,, G.A. Kovaltsov, Cosmic ray induced ionization in the atmosphere: Full modeling and practical applications, J. Geophys. Res., 111, D21206, 2006.
    255. Voiculescu, M., I.G. Usoskin, and K. Mursula, Different response of clouds at the solar input, Geophys. Res. Lett. 33, L21802, 2006.
    256. Usoskin, I.G., S.K. Solanki, C. Taricco, N. Bhandari and G.A. Kovaltsov, Long-term solar activity reconstructions: Direct test by cosmogenic 44Ti in meteorites, Astron. Astrophys., 457, L25-L28, 2006. See also Press-release
    257. Usoskin, I.G., S.K. Solanki, G.A. Kovaltsov, J. Beer, B. Kromer, Solar proton events in cosmogenic isotope data, Geophys. Res. Lett., 33(8), L08107, 2006.
    258. Usoskin, I.G., S.K. Solanki, M. Korte, Solar activity reconstructed over the last 7000 years: The influence of geomagnetic field changes, Geophys. Res. Lett., 33(8), L08103, 2006.
    259. Starodubtsev, S.A., I.G. Usoskin, A.V. Grigoryev, K. Mursula, Long-term modulation of the cosmic ray fluctuation spectrum, Annales Geophys., 24, 779-783, 2006.
    260. Berdyugina, S.V., D. Moss, D. Sokoloff and I.G.Usoskin, Active longitudes, nonaxisymmetric dynamos and phase mixing, Astron. Astrophys., 445, 703-714, 2006.

      2005

    261. Usoskin, I.G., K. Alanko-Huotari, G.A. Kovaltsov, K. Mursula, Heliospheric modulation of cosmic rays: Monthly reconstruction for 1951-2004, J. Geophys. Res., 110(A12), CiteID A12108, 2005.
    262. Enqvist, T., et al., Measurements of muon flux in the Pyhasalmi underground laboratory, Nucl. Instrum. Methods A, 554, 286-290, 2005.
    263. Usoskin, I.G., S.V. Berdyugina, and J. Poutanen, Preferred sunspot longitudes: Non-axisymmetry and differential rotation, Astron. Astrophys., 441, 347-352, 2005.
    264. I.G. Usoskin, M. Schuessler, S. Solanki, K. Mursula, Solar activity, cosmic rays and Earth's temperature: A millennium-scale comparison, J. Geophys. Res., 110, doi:10.1029/2004JA010946, 2005.
    265. Solanki, S., I.G. Usoskin, B. Kromer, M. Schuessler and J. Beer, Reply, Nature, 436, E4-E5, doi:10.1038/nature04046, 2005. (a Reply to the comment by R. Muscheler).
    266. I.G. Usoskin and B. Kromer, Reconstruction of the 14C production rate from measured relative abundance, Radiocarbon, 47(1), 31-37, 2005.

      2004

    267. Musrula, K., I.G. Usoskin, and E. Cliwer, Preface, Solar Phys., 224, 3-4, 2004.
    268. Solanki, S.K., I.G. Usoskin, B. Kromer, M. Schuessler and J. Beer, An unusually active Sun during recent decades compared to the previous 11,000 years, Nature, 431, 1084-1087, 2004
      (see also Supplementary materials and the related article in "News and Views")
    269. Kovaltsov, G.A., I.G. Usoskin, and K. Mursula, An Upper Limit on Sunspot Activity During the Maunder minimum, Solar Phys., 224, 95-101, 2004 .
    270. Starodubtsev, S.A., I.G. Usoskin, and K. Mursula, Rapid Cosmic Ray Fluctuations: Evidence for Cyclic Behaviour, Solar Phys., 224, 335-343, 2004.
    271. Usoskin, I.G., and G.A.Kovaltsov, Long-Term Solar Activity: Direct and Indirect Study, Solar Phys., 224, 37-47, 2004 (invited review).
    272. I.G. Usoskin, N. Marsh, G.A. Kovaltsov, K. Mursula and O.G. Gladysheva, Latitudinal dependence of low cloud amount on cosmic ray induced ionization, Geophys. Res. Lett., 31(16), L16109, doi:10.1029/2004GL019507, 2004.
    273. I.G. Usoskin, O.G. Gladysheva and G.A. Kovaltsov, Cosmic ray induced ionization in the atmosphere: Spatial and temporal changes, J. Atm. Solar-Terr. Phys., 66, 1791-1796, 2004.
    274. I.G. Usoskin, S. Solanki, M. Schuessler, and K. Mursula, Reply, Phys. Rev. Lett., 92(19), 199002, 2004..
    275. I.G.Usoskin, K. Mursula, S. Solanki, M. Schuessler, and K. Alanko, Reconstruction of solar activity for the last millennium using 10Be data, Astron. Astrophys., 413, 745-751, 2004.
    276. K.Kudela, and I.G.Usoskin, On magnetospheric transmissivity of cosmic rays, Chez. J. Phys., 54, 239-254, 2004.

      2003

    277. I.G. Usoskin, and K. Mursula, Long-Term Solar Cycle Evolution: Review of Recent Developments, Solar Phys., 218, 319-343, 2003 (invited review)
    278. I.G. Usoskin, S. Solanki, M. Schuessler, K. Mursula, K. Alanko, A millennium scale sunspot number reconstruction: Evidence for an unusually active sun since the 1940's, Phys. Rev. Lett., 91(21), 211101, 2003.
    279. S.A. Starodubtsev, I.G.Usoskin, Long-term modulationof thegalactic cosmic-ray fluctuation spectrum, Astron. Lett., 29, 594-598, 2003.
    280. I.G.Usoskin, K. Mursula, G.A. Kovaltsov, Reconstruction of monthly and yearly group sunspot numbers from sparse daily observations, Solar Phys., 218, 295-305, 2003.
    281. S.V. Berdyugina, I.G. Usoskin, Preferred Longitudes in Sunspot Activity, Astron. Astrophys., 405, 1121-1128, 2003.
    282. I.G. Usoskin, K. Mursula, G.A. Kovaltsov, The lost sunspot cycle: Reanalysis of sunspot statistics, Astron. Astrophys., 403, 743-748, 2003 .
    283. K. Mursula, I.G. Usoskin, and G.A. Kovaltsov - Reconstructing the long-term cosmic ray intensity: Linear relations do not work - Annales Geophys., 21, 863-867, 2003
    284. K. Alanko, I.G. Usoskin, K. Mursula, G.A. Kovaltsov, Heliospheric modulation strength: Effective neutron monitor energy, Adv. Space Res., 32(4), 615-620, 2003.

      285. 2002

    285. I.G. Usoskin, K. Mursula, G.A. Kovaltsov - Lost sunspot cycle in the beginning of Dalton minimum: New evidence and consequences - Geophys. Res. Lett, v.29(24), 2183, doi: 10.1029/2002GL015640, 2002.
    286. I.G. Usoskin, K. Mursula, S.K. Solanki, M. Schuessler, and G.A. Kovaltsov - A physical reconstruction of cosmic ray intensity since 1610 - J. Geophys. Res. , v. 107(A11), 1374, doi: 10.1029/2002JA009343, 2002.
    287. I.G.Usoskin, K. Alanko, K. Mursula, G.A. Kovaltsov - Heliospheric modulation strength during the neutron monitor era - Solar Phys., 207, 389-399, 2002.
    288. J.Alcaraz et al. (The AMS collaboration) - The Alpha Magnetic Spectrometer - Nucl. Instr. Meth. Phys. Res. A, 2002, 478, 119-122.
    289. K.Mursula, I.G.Usoskin, G.A.Kovaltsov - A 22-year cycle in sunspot activity - Adv. Space Res., 29, 1979-1984, 2002.
    290. Gladysheva O.G., G.E. Kocharov, G.A. Kovaltsov, I.G. Usoskin - Nitrate abundance in polar ice during the great solar activity minimum - Adv. Space Res., 29, 1707-1711, 2002.

      2001

    291. I.G.Usoskin,K. Mursula, G.A. Kovaltsov - Was one sunspot cycle lost in late XVIII century? - Astron.Astrophys., 2001, v.370, L31-L34.
    292. K. Mursula, I.G. Usoskin, G.A. Kovaltsov - Persistent 22-year cycle in sunspot activity: Evidence for a relic solar magnetic field, - Solar Phys., 2001, v.198, 51-56.
    293. I.G.Usoskin, K. Mursula, G.A. Kovaltsov - Simulation of sunspot activity during active Sun and great minima using regular, random and relic fields - Solar Phys., 2001, v.199, 187-199.
    294. I.G.Usoskin, P.Bobik , O.G.Gladysheva, H.Kananen, G.A.Kovaltsov, and K.Kudela - Sensitivity of a Neutron Monitor to Galactic Cosmic Rays – Adv. Space Res., 27, 565-569, 2001.
    295. I.G.Usoskin, K.Mursula, H.Kananen, G.A.Kovaltsov - Dependence of cosmic rays on solar activity for odd and even solar cycles - Adv. Space Res., 27, 571-576, 2001.
    296. I.G.Usoskin, K. Mursula, G.A. Kovaltsov - Heliospheric modulation of cosmic rays and solar activity during the Maunder minimum - J.Geophys.Res., 2001, v.106 (A8), 16039.
    297. G. Boella, M. Gervasi, S. Mariani, P. G. Rancoita, I. G. Usoskin - Evidence for charge drift modulation at intermediate solar activity from the flux variation of protons and alpha particles - J.Geophys.Res., 2001, 106(A12), 29355--29362.

      2000

    298. I.G.Usoskin, K.Mursula, G.A.Kovaltsov - Sunspot activity during the Maunder minimum - Astron.Astrophys., 2000, 354, L33-L36.
    299. J.Alcaraz et al. (The AMS collaboration) - Helium in near Earth orbit - Phys.Lett.B, 2000, 494, 193-202.
    300. J.Alcaraz et al. (The AMS collaboration) - Cosmic protons - Phys.Lett.B, 2000, 490, 27-35.
    301. J.Alcaraz et al. (The AMS collaboration) - Protons in near Earth orbit - Phys.Lett.B, 2000, 472, 215-226.
    302. J.Alcaraz et al.  (The AMS collaboration) – Leptons in near Earth orbit - Phys.Lett.B, 2000, 484, 10-12.

      303. <2000

    303. M.Gervasi, P.G.Rancoita, I.G.Usoskin , G.A.Kovaltsov - Monte-Carlo Approach to Galactic Cosmic Ray Propagation in the Heliosphere - Nuclear Phys.B (Proc.Suppl.), 1999, 78, 26-31.
    304. M.Boschini, M.Gervasi, D.Grandi, P.G.Rancoita, L.Trombeta, I.G.Usoskin - An Oracle © Database for the AMS experiment - Nuclear Phys.B (Proc.Suppl.), 1999, 78, 727-731.
    305. I.G.Usoskin, O.G.Gladysheva, K.Kudela, P.Bobik, H.Kananen - Connections between neutron monitor count rate and solar modulation strength - Czechoslovak J. Phys., 1999, v.49, p.1740-1750.
    306. J.Alcaraz et al. (The AMS collaboration) - Search for Antihelium in Cosmic Rays - Phys.Lett.B, 1999, 461, 387-396.
    307. I.G.Usoskin H.Kananen, G.A.Kovaltsov, K.Mursula, P.Tanskanen - Correlative Study of Solar Activity and Cosmic Ray Intensity - J.Geophys.Res., 1998, v.103(A5), p.9567-9574.
    308. G. Boella, M.Gervasi, M.Potenza, P.G. Rancoita and I.Usoskin - Modulated Antiproton Spectra for Interstellar Production Models - Astroparticle Phys., 1998, v9(3), p.261-267.
    309. I.G.Usoskin , G.A.Kovaltsov, H.Kananen, K.Mursula, P.J.Tanskanen - Phase Evolution of Solar Activity and Cosmic Ray Variation Cycles - Solar Phys., 1997, v.170, p.447-452.
    310. I.G.Usoskin, G.A.Kovaltsov, H.Kananen, P.Tanskanen, The World Neutron Monitor Network as a Tool for the Study of Solar Neutrons, Annales Geophysicae, 1997, v.15, p.375-386.
    311. K.Mursula, I.Usoskin , B.Zieger, On the claimed 5.5 year periodicity, Solar Phys., 1997, v.176, p.201-210.
    312. Kocharov, L.G., J. Torsti, F. Tang, H. Zirin, G.A. Kovaltsov, I.G. Usoskin, Impact of Magnetic Environment on the Generation of High-energy Neutrons on the Sun, Solar Phys., v.172, p.271-278, 1997.
    313. I.G.Usoskin and I.G.Kovaltsov - Determination of Neutron Flux from Solar Flares by Means of Ground-based Neutron Monitors - Geomagn.Aeronom., 1997, v.37, N3, P.369-371.
    314. L.G.Kocharov, J.Torsti, R.Vainio, G.A.Kovaltsov, I.G.Usoskin - A Joint Analysis of High-Energy Neutrons and Neutron-Decay Protons from a Flare - Solar Phys., 1996, v.169, p.181-207.
    315. A.M.Galper,V.G.Zverev,B.I.Luchkov,Yu.V.Ozerov, A.M.Khodarovich, G.A.Kovaltsov, I.G.Usoskin - Temporal and spectral characteristics of solar gamma flares observed in the GAMMA-1 experiment - J. Moscow Phys. Soc., 1996, v.6, p.317-323.
    316. L.G.Kocharov, J.W.Lee, H.Wang, H.Zirin, G.A.Kovaltsov, I.G.Usoskin - The 1991 March 22 Flare: Possible Anisotropy of High Energy Neutral Emission. - Solar Phys., 1995, v.158,p.95-114.
    317. G.A.Kovaltsov, I.G.Usoskin , L.G.Kocharov, H.Kananen, P.J.Tanskanen - Neutron Monitor Data on the 15 June 1991 Solar Flare: Neutrons as a Test for Proton Acceleration Scenario - Solar Phys., 1995, v.158, p.395-398.
    318. L.G.Kocharov, G.A.Kovaltsov, G.E.Kocharov, E.I.Chuikin, I.G.Usoskin , M.S.Shea, D.F. Smart, V.F. Melnikov, T.S.Podstrigach, T.P. Armstrong, H.Zirin - Electromagnetic and Corpuscular Emission from the Solar Flare of 1991 June 15: Continuous Acceleration of Relativistic Particles. - Solar Phys., 1994, v.150, p.267-283.
    319. L.G.Kocharov, J.W.Lee, H.Zirin, G.A.Kovaltsov, I.G.Usoskin , K.R.Pyle, M.A.Shea, D.F.Smart - Neutron and electromagnetic emission during the 1990 May 24 solar flare. - Solar Phys., 1994, v.155, p.149-170.
    320. G.A.Kovaltsov, G.E.Kocharov, L.G.Kocharov, I.G.Usoskin - Generations of Neutrons During the Solar Flare of May 24, 1990. - Astronomy Letters, 1994, v.20, P.658-664.
    321. G.E.Kocharov, G.A.Kovaltsov, I.G.Usoskin - Solar Flare Neutrinos. - Nuovo Cimento,1991,v.14C, N4, p.417-422
    322. V.M.Ostryakov, I.G.Usoskin - On the dimension of solar attractor. - Solar Phys., 1990, v.127, p.405-409.
    323. V.M.Ostryakov, I.G.Usoskin - Correlation dimensions of structured signals - Sov.Tech.Phys.Lett., v.16, No.9, 1990, p.658-659.
    REFEREED NATIONAL JOURNALS
    1. I.G.Usoskin, G.A.Kovaltsov, L.G.Kocharov, H.Kananen, P.Tanskanen - Solar neutron detection: the method of weighted summarizing of neutron monitor responses. - Izvestiya RAN,ser.fyz.,1995, v.59, N4, P.10-14 (in Russian).
    2. G.A.Kovaltsov, L.G.Kocharov, I.G.Usoskin , H.Kananen, P.Tanskanen, A.Y.Drobysh - Two components of high energy neutrons at the 24 May 1990 solar flare - Izvestiya RAN, ser.fyz., 1995, v.59, N4, P.195-199 (in Russian).
    3. Yu.E.Efimov, G.A.Kovaltsov, G.E.Kocharov, L.G.Kocharov, I.G.Usoskin - Detection of solar neutrons by the world neutron monitor network. - Izvestiya RAN, ser.fiz., 1993, v.57 N7, p.142-145. (in Russian)
    4. G.A.Kovaltsov,G.E.Kocharov,L.G.Kocharov,V.F.Melnikov,T.S.Podstrigach, I.G.Usoskin ,E.I.Chuikin - Gamma-radiation of the 15th June 1991 solar flare as an evidence of prolonged protons acceleration upto 10 MeV. - Izvestiya RAN, ser.fiz., 1993, v.57 N7, p.138-141. (in Russian).
    5. V.M.Ostryakov and I.G.Usoskin - On the dimension of solar attractor - Solnechnye Dannye, 1988, No.2, p.91-96. (in Russian)
    INTERNATIONAL CONFERENCE PROCEEDINGS
    1. Usoskin, I.G., S.K. Solanki and G.A. Kovaltsov, Grand minima of solar activity during the last millennia, Procs. IAU, V. 7, Symp. S286, 372-382, 2011 (10.1017/S174392131200511X).
    2. Zhang, L., K. Mursula, I. Usoskin, H. Wang and Z. Du, Long-term variation of solar surface differential rotation, in Arnab Rai Choudhuri & Dipankar Banerjee (Eds.), ASI Conference Series, 2, 175-180, 2011.
    3. Usoskin, I.G., Cosmic rays and climate forcing, Mem. Soc. Astron. Ital., 82, 937-942, 2011.
    4. Gopalswamy, N., H. Xie, S. Akiyama, P. Makela, S. Yashiro, I. Usoskin, Heliocentric Distance of CMEs at the Time of Energetic Particle Release: Revisiting the Ground Level Enhancement Events of Solar Cycle 23, Proc. 32 Internat. Cosmic Ray Conf., Beijing, China, ID:1333, v.10, 157-160, 2011.
    5. Usoskin, I.G., G.A. Bazilevskaya, G. A. Kovaltsov, Solar modulation of cosmic rays since 1936: Neutron monitors and balloon-borne data, Proc. 32 Internat. Cosmic Ray Conf., Beijing, China, ID:0285, v.11, 40-43, 2011.
    6. Starodubtsev, S.A, V. G. Grigoryev, I.G. Usoskin, K. Mursula, Arrival of an Interplanetary Shocks at the Earth: a Real-Time Forecast Based on ACE Spacecraft Data, Proc. 32 Internat. Cosmic Ray Conf., Beijing, China, v.11, 291-294, ID:0252, 2011.
    7. Usoskin, I.G., G. A. Kovaltsov, I. A. Mironova, Numerical model of cosmic ray induced ionization in the atmosphere CRAC:CRII, Proc. 32 Internat. Cosmic Ray Conf., Beijing, China, ID:0284, v.11, 345-348, 2011.
    8. Sokoloff, D. Arlt, R., Moss, D., Saar, S.H., Usoskin, I., Sunspot cycles and Grand Minima, Solar and Stellar Variability: Impact on Earth and Planets, Proceedings of the Internat. Astron. Union, IAU Symposium, V. 264, 111-119, 2010
    9. Bazilevskaya, G.A., V.S. Makhmutov, Y.I. Stozhkov, A.K. Svirzhevskaya, N.S. Svirzhevsky, I.G. Usoskin, G.A. Kovaltsov, T. Sloan, Dynamics of the ionizing particle fluxes in the Earth's atmosphere, Proc. 31st Internat. Cosmic Ray Conf., Lodz, Poland, ID:icrc0228, 2009.
    10. Starodubtsev, S.A., Usoskin, I.G., K. Mursula, Solar cycle variation of rapid fluctuations of energetic particles at the geostationary orbit, Proc. 31st Internat. Cosmic Ray Conf., Lodz, Poland, ID:icrc0194, 2009.
    11. G.A. Kovaltsov, I.G. Usoskin, Test of production models for Beryllium cosmogenic radionuclides in the Earths atmosphere, Proc. 31st Internat. Cosmic Ray Conf., Lodz, Poland, ID:icrc0163, 2009.
    12. Usoskin, I.G., A.J. Tylka, G.A. Kovaltsov, W.F. Dietrich, Ionization effect of strong solar particle events: Low-middle atmosphere, Proc. 31st Internat. Cosmic Ray Conf., Lodz, Poland, ID:icrc0162, 2009.
    13. Usoskin, I.G., C.V. Field, G.A. Schmidt, A.-P. Leppanen, A. Aldahan, G.A. Kovaltsov, G. Possnert, R.K. Ungar, Cosmogenic isotope 7Be as a tracer for air mass dynamics, Proc. 31st Internat. Cosmic Ray Conf., Lodz, Poland, ID:icrc0161, 2009.
    14. Usoskin, I.G., G.A. Kovaltsov, M. Korte, I.A. Mironova, Long-term geomagnetic changes and their possible role in regional atmospheric ionization and climate, Proc. 31st Internat. Cosmic Ray Conf., Lodz, Poland, ID:icrc0161, 2009.
    15. Usoskin, I.G., G.A. Kovaltsov, I. Mironova, Cosmic ray induced ionization in the atmosphere: Galactic and solar cosmic rays, in: XXIII Geofysiikan Paivat, Geophysical Society of Finland, p. 170-171, Oulu, 2007.
    16. Starodubtsev, S., A. Grigoryev, I. Usoskin, K. Mursula, Rapid cosmic ray fluctuations in real-time during the SEP events in December 2006, in: Proc. 30-th Internat. Cosmic Ray Conf., Merida, Mexico, 1, 135-138, 2008.
    17. I. Usoskin, G. Kovaltsov, O. Gladysheva, T. Jamsen, Forbush decreases: Energy dependence of the recovery, in: Proc. 30-th Internat. Cosmic Ray Conf., Merida, Mexico, 1, 237-330, 2008.
    18. I.G. Usoskin, K. Alanko-Huotari, K. Mursula, G.A. Kovaltsov, Stochastic simulation of cosmic ray modulation: Effect of a wavy HCS, in: Proc. 30-th Internat. Cosmic Ray Conf., Merida, Mexico, 1, 459-462, 2008.
    19. I. Usoskin, G. Kovaltsov, Numerical Model of Cosmic Ray Induced Ionization in the Atmosphere, in: Proc. 30-th Internat. Cosmic Ray Conf., Merida, Mexico, 1, 705-708, 2008.
    20. Starodubtesev, S.A., I.G. Usoskin, A.V. Grigoriev, K. Mursula, Long-Term Modulation of the Cosmic Ray Fluctuation Spectrum: Spacecraft Measurements, in: Proc. 29th Intern. Cosmic Ray Conf., Pune, India 2005, v.2., 247-250.
    21. Gopalswamy, N., H. Xie, S. Yashiro, I.G. Usoskin, Coronal Mass Ejections and Ground Level Enhancements, in: Proc. 29th Intern. Cosmic Ray Conf., Pune, India 2005, v.2., 169-172.
    22. Alanko, K., I.G. Usoskin, K. Mursula, The role of drifts in the galactic cosmic ray transport, in: Proc. 29th Intern. Cosmic Ray Conf., Pune, India 2005, v.2., 53-56.
    23. Starodubtsev, S.A., A.A. Turpanov, K. Kudela, I.G. Usoskin, V.G. Yanke , V.G. Grigoryev, N.I. Neustroyev, A.G. Egorov and A.N. Prikhodko, Real-Time Cosmic Ray Distributed (RECORD) database: A status Report, in: Proc. 29th Intern. Cosmic Ray Conf., Pune, India 2005, v.2., 456-458.
    24. Berdyugina S.V., I.G. Usoskin, Persistent active longitudes in sunspot activity: Sun-as-a-star approach, in Stars as Suns: Activity, Evolution, and Planets, IAU Symp. 219, eds. A. Benz, A. Dupree, p. 128-132, 2004.
    25. I.G. Usoskin, Long-Term Variations of Cosmic Rays and Terrestrial Environment, in: Frontiers of Cosmic Ray Science, (eds. T.Kajita, Y. Asaoka, A.Kawachi, Y.Matsubara, M.Sasaki), Universal Academy Press, Tokyo, p.205-228, 2004.
    26. V. Kozlov, K. Kudela, S. Starodubtsev, A. Turpanov, I.G. Usoskin, and V. Yanke, Neutron monitor data base in real time, in: Proc. ISCS 2003 Symposium "Solar Variability as an Input to the Earth's Environment", Slovakia (23-28 June 2003), ESA SP-535, p. 675-678.
    27. P. Bobik, M. Gervasi, D. Grandi, P.G. Rancoita, I.G. Usoskin, 2D stochastic simulation model of cosmic ray modulation: Comparison with experimental data, in: Proc. ISCS 2003 Symposium "Solar Variability as an Input to the Earth's Environment", Slovakia (23-28 June 2003), ESA SP-535, p. 637-640.
    28. I.G. Usoskin, and K. Mursula, New standpoints in long-term solar cycle evolution: A review, in: Proc. ISCS 2003 Symposium "Solar Variability as an Input to the Earth's Environment", Slovakia (23-28 June 2003), ESA SP-535, p. 25-36.
    29. I.G. Usoskin, K. Mursula, and G.A. Kovaltsov, On the reliability of monthly/yearly means calculated from sparse daily sunspot observations, in: Proc. ISCS 2003 Symposium "Solar Variability as an Input to the Earth's Environment", Slovakia (23-28 June 2003), ESA SP-535, p. 165-168.
    30. I.G. Usoskin, K. Mursula, and G.A. Kovaltsov, The lost sunspot cycle: Reanalysis of sunspot statistics, in: Proc. ISCS 2003 Symposium "Solar Variability as an Input to the Earth's Environment", Slovakia (23-28 June 2003), ESA SP-535, p. 161-164.
    31. I.G. Usoskin, K. Mursula, S. Solanki, M. Schuessler, G.A. Kovaltsov, Long-Term Cosmic Ray Intensities: Physical Reconstruction, in: Proc. 28th Intern. Cosmic Ray Conf., Tuskuba, Japan, 2003, p. 4041-4044.
    32. Starodubtsev, S. and I.G. Usoskin, Galactic Cosmic Ray Fluctuations: Long-term Modulation of Power Spectrum, in: Proc. 28th Intern. Cosmic Ray Conf., Tuskuba, Japan, 2003, p. 3905-3908.
    33. Alanko, K., I.G. Usoskin, K. Mursula, G.A. Kovaltsov, Effective energy of Neutron Monitor, in: Proc. 28th Intern. Cosmic Ray Conf., Tuskuba, Japan, 2003, p. 3901-3904.
    34. Alanko, K., I.G. Usoskin, K. Mursula, G.A. Kovaltsov, A 2D stochastic simulation of galactic cosmic rays transport in the heliosphere, in: Proc. 28th Intern. Cosmic Ray Conf., Tuskuba, Japan, 2003, p. 3851-3854.
    35. I.G. Usoskin, K. Mursula, G.A. Kovaltsov and K. Alanko, Long-Term Cosmic Ray Modulation by Heliospheric Parameters: Non-linear Relations, in: Proc. 28th Intern. Cosmic Ray Conf., Tuskuba, Japan, 2003, p. 3803-3806.
    36. Kozlov, V., L. Ksenofontov, K. Kudela, S. Starodubtsev, A. Turpanov, I.G. Usoskin, V., REal-time COsmic Ray Database (RECORD), in: Proc. 28th Intern. Cosmic Ray Conf., Tuskuba, Japan, 2003, p. 3473-3476.
    37. Usoskin, I. G., K. Mursula, G.A. Kovaltsov, Simulating regularity and randomness in sunspot activity, in: Proc. 10th Europ. Solar Phys. Meeting (9-14 Sep. 2002), ESA-SP-506, 863-866, 2002
    38. S.V. Berdyugina, I.G. Usoskin, Persistent active longitudes on the Sun, in: Procs. 1st Potsdam Thinkshop on Sunspots and Starspots, eds.: K.G. Stassmeier and A. Washuettl, Potsdam, 2002, p.31-32.
    39. Usoskin, I. G., K. Mursula, G.A. Kovaltsov, The Start of the Dalton Minimum: Was One Sunspot Cycle Lost in Late XVIII Century?, in: Proc. 2nd SOLSPA Euroconference, ESA-SP-477, 257-260, 2002
    40. K. Mursula, I. G. Usoskin, and G. A. Kovaltsov, Long-term cosmic ray intensity vs. solar proxies: A simple linear relation does not work, in: Proc. 2nd SOLSPA Euroconference, ESA-SP-477, 463-466, 2002.
    41. I.G. Usoskin, K. Mursula, and G.A. Kovaltsov, Odd and even cycles in cosmic rays and solar activity - in: Proc. 27th Intern.Cosmic Ray Conf., Hamburg, 2001, p. 3791-3794.
    42. I.G. Usoskin, K. Alanko, K. Mursula, K. Kudela, and G. A. Kovaltsov, Variations of the heliospheric modulation strength during the neutron monitor era - in: Proc. 27th Intern.Cosmic Ray Conf., Hamburg, 2001, p. 3810-3813.
    43. K. Mursula, I. G. Usoskin, and G. A. Kovaltsov, Long-term cosmic ray intensity vs. solar proxies: A simple linear relation does not work - in: Proc. 27th Intern.Cosmic Ray Conf., Hamburg, 2001, p. 3838-3841.
    44. P. Bobik, K. Kudela, and I. Usoskin, Geomagnetic cutoff Penumbra structure: Approach by transmissivity function - in: Proc. 27th Intern.Cosmic Ray Conf., Hamburg, 2001, p. 4056-4059.
    45. I.G. Usoskin, K. Mursula, and J. Kangas, On-line database of cosmic ray intensities - in: Proc. 27th Intern.Cosmic Ray Conf., Hamburg, 2001, p. 3842.
    46. A.-M. Elo, T. Jamsen, J. Kangas, K. Mursula, J. Peltoniemi, I. G. Usoskin, M. Vallinkoski, and E. Valtonen, The MUG experiment for observing muon fluxes underground: Test data and development plans - in: Proc. 27th Intern. Cosmic Ray Conf., Hamburg, 2001, p. 1249.
    47. T. Jamsen, A.-M. Elo, J. Kangas, K. Mursula, J. Peltoniemi, I. G. Usoskin, M. Vallinkoski, and E. Valtonen, A new multilevel experiment MUG for observing muon fluxes Underground - in: Proc. 27th Intern. Cosmic Ray Conf., Hamburg, 2001, p. 1250.
    48. E. V. Vashenyuk, B. B. Gvozdevsky, V. V. Phelkin, I. G. Usoskin, K. Mursula, and G. A. Kovaltsov, The ground-level enhancement of 14 July 2000: Explaining the difference between near-by neutron monitors at Apatity and Oulu - in: Proc. 27th Intern. Cosmic Ray Conf., Hamburg, 2001, p. 3383-3386.
    49. O. G. Gladysheva, P. B. Dmitriev, I. G. Usoskin, N. I. Barkov, A. A. Ekaykin, and V. V. Nikanorov, Nitrate abundance in polar snow during last 50 year: connection to atmospheric ionization - in: Proc. 27th Intern. Cosmic Ray Conf., Hamburg, 2001, p. 4191.
    50. I.G. Usoskin, K. Mursula, and G. A. Kovaltsov - Regular and random components of sunspot activity during active sun and great minima: Model simulation, in: Proc. 1st SOLSPA Euroconference, ESA-SP-463, p.447-450, 2000.
    51. K. Mursula, I. G. Usoskin, and G. A. Kovaltsov, Persistent 22-year cycle in sunspot activity: Evidence for a relic solar magnetic field, in: 1st SOLSPA Euroconference, ESA-SP-463, p.387-390, 2000.
    52. I.G.Usoskin, K.Mursula, H.Kananen, P.Tanskanen, G.A.Kovaltsov - Time evolution of Solar Activity and Cosmic Ray Intensity during the Maunder Minimum - in: Proc. 26th Intern.Cosmic Ray Conf., Salt Lake City, 1999, v.7, p.127-130.
    53. M.Gervasi, P.G.Rancoita, I.G.Usoskin - Transport of Galactic Cosmic Rays in the Heliosphere: Stochastic Simulation Approach - in: Proc. 26th Intern.Cosmic Ray Conf., Salt Lake City, 1999, v.7, p. 69-72.
    54. G. Boella, M.Gervasi, S.Mariani, P.G. Rancoita and I.Usoskin - Evidence of charge drift effect in solar Modula-tion of Galactic Cosmic Rays - in: Proc. 26th Intern.Cosmic Ray Conf., Salt Lake City, 1999, v.7, p. 33-38.
    55. G. Boella, M.Gervasi, M.Potenza, P.G. Rancoita and I.Usoskin - Effect of the solar modulation at minimum activity on expected ratio of antiproton to proton flux - Proc. of COSMO-97 Int. Workshop, Ambleside (UK), World Scientific Publ., Singapore, 1998, p.273-275.
    56. H.Kananen, G.A.Kovaltsov, P.Tanskanen, I.G.Usoskin - Direct deduction of the number of neutrons injected from the Sun on the basis of neutron monitor response - Proc. 25th Intern.Cosmic Ray Conf., Durban, 1997, v.1, p.49-52.
    57. L.G.Kocharov, G.A.Kovaltsov, J.Torsti, I.G.Usoskin - Impact of magnetic environment on the generation of high-energy neutrons and gamma-rays during solar flares - Proc. 25th Intern.Cosmic Ray Conf., Durban, 1997, v.1, p.65-68.
    58. 7.A.M.Galper,B.I.Luchkov, Yu.V.Ozerov, A.M.Khodarovich, S.B.Rinchinov, G.A.Kovaltsov, I.G.Usoskin - Phases of charged particles acceleration during powerful solar gamma-flares detected by the GAMMA-1 - Proc. 25th Intern.Cosmic Ray Conf., Durban, 1997, v.1, p.169-172.
    59. I.G.Usoskin , G.A.Kovaltsov, H.Kananen, K.Mursula, P.Tanskanen - Period of unusual cosmic ray modulation in late 20th cycle: correlative study of cosmic ray variations versus solar activity - Proc. 25th Intern.Cosmic Ray Conf., Durban, 1997, v.2., p.201-204.
    60. G.A.Dreschhoff, O.G.Gladysheva, G.E.Kocharov, G.A.Kovaltsov, I.G.Usoskin , E.Zeller - Signature of Solar Activity and Strong Solar Proton Events in Abundance of Nitrates in Polar Ice: Resent 4 Cycles - Proc. Intern.Workshop "News and Views in Astrophysics", Helsinki-St.Petersburg, 1997, eds.G.E.Kocharov, p.75-81.
    61. I.G.Usoskin , H.Kananen, K.Mursula, P.Tanskanen, G.A.Kovaltsov - Period of unusual modulation of cosmic ray intensity: the declining phase of cycle 20 - Proc. 31 ESLAB Symposium "Correlated Phenomena at the Sun, in the Heliosphere and in Geospace", ESTEC, Noordwijk, 1997, p.491-495.
    62. L.G.Kocharov, G.A.Kovaltsov, J.Torsti, I.G.Usoskin , H.Zirin, A.Anttila, R.Vanio - The 1990 May 24 Solar Flare and Cosmic Ray Event - in AIP Conf. Proc. 374, eds. R.Ramaty, N.Mandzhavidze, X.-M.Hua, AIP Press, NY, 1996, p.246-255.
    63. I.G.Usoskin , G.A.Kovaltsov, L.G.Kocharov, H.Kananen, P.J.Tanskanen. High Energy Neutrons from the 15 June 1991 Solar Flare as Detected by The Neutron Monitor. - Proc. 24 Intern.Cosmic Ray Conf., Rome, 1995, v.4, p.151-154.
    64. H.Kananen, L.G.Kocharov, G.A.Kovaltsov, P.J.Tanskanen, I.G.Usoskin - The June 3, 1982 Solar Flare as a Test for Neutron Monitor Sensitivity for Solar Neutrons. - Proc. 24 Inter.Cosmic Ray Conf.,Rome,1995,v.4,p.147-150.
    65. G.A.Kovaltsov, L.G.Kocharov, I.G.Usoskin , H.Kananen, P.J.Tanskanen - Two Injections of High Energy Neutrons during the 24 May 1990 Solar Flare. - Proc. 24 Intern.Cosmic Ray Conf., Rome, 1995, v.4, p.155-158.
    66. L.G.Kocharov, G.A.Kovaltsov, J.Torsti, I.G.Usoskin , H.Zirin - Correlative Investigation of the 1990 May 24 Solar Flare. - Proc. 24 Intern.Cosmic Ray Conf., Rome, 1995, v.4, p.159-162.
    67. G.E.Kocharov, E.I.Chuikin, G.A.Kovaltsov, I.G.Usoskin , L.G.Kocharov - High energy gamma-ray signature of proton acceleration during 1991 June 15 solar flare. - in AIP Conf. Proc. 294, eds.J.M.Ryan and W.T.Vestrand, NY, 1994, p.45-50.
    68. L.G.Kocharov, J.W.Lee, H.Zirin, G.A.Kovaltsov, I.G.Usoskin - Neutron and Gamma-ray Emission During 1990 May 24 flare. - in: Abstracts of 1994 Spring Meeting of American Geophys. Union, Baltimor, Maryland, May 1994, EOS, P.287.
    69. G.E.Kocharov, E.I.Chuikin, L.G.Kocharov, G.A.Kovaltsov, V.F.Melnikov, T.S.Podstrigach, I.G.Usoskin - High energy gamma rays from the 1991 June 15 solar flare as evidence of proton acceleration up to 10 MeV - in Proc. 23 Intern.Cosmic Ray Conf, Calgary, 1993, v.3, p.123-126.
    70. Yu.E.Efimov, L.G.Kocharov, G.A.Kovaltsov, I.G.Usoskin - Detection of solar neutrons by the neutron monitor network. - in Proc. 23 Intern.Cosmic Ray Conf, Calgary, 1993, v.3, p.159-162.
    71. G.E.Kocharov, G.A.Kovaltsov and I.G.Usoskin - Solar Flare Neutrinos - in: Proc. 22 Intern.Cosmic Ray Conf., Dublin, 1991, v.3, p.753-755.
    72. V.M.Ostryakov and I.G.Usoskin - On the dimension of solar attractor. - in: Abstracts of Solar Photosphere: structure, convection and magnetic fields IAU symposium No.138, Kiev, 1989, p.176.
    73. V.M.Ostryakov and I.G.Usoskin - On the dimension of solar attractor. - Sun in Time Conference, Tucson, 1989.
    OTHER PUBLICATIONS
    1. Usoskin, I.G., L. Desorgher, P. Velinov, M. Storini, E.O. Flueckiger, R. Buetikofer, G.A. Kovaltsov, Solar and galactic cosmic rays in the Earth's atmosphere, in "COST 724 final report: Developing the scientific basis for monitoring, modelling and predicting Space Weather" (eds. J. Lilensten, A. Belehaki, M. Messerotti, R. Vainio, J. Watermann, S. Poedts), COST Office, Luxemburg, 2008 (ISBN 978-92-898-0044-0), pp. 124-132.
    2. Vainio, R., L. Desorgher, E. Flueckier, I. Usoskin, An overview of the physics of the Earth's radiation environment, in "COST 724 final report: Developing the scientific basis for monitoring, modelling and predicting Space Weather" (eds. J. Lilensten, A. Belehaki, M. Messerotti, R. Vainio, J. Watermann, S. Poedts), COST Office, Luxemburg, 2008 (ISBN 978-92-898-0044-0), pp. 97-107.
    3. L.G.Kocharov, J.W.Lee, H.Zirin, G.A.Kovaltsov, I.G.Usoskin , K.R.Pyle, M.A.Shea, D.F.Smart - Neutron and electromagnetic emission during the 1990 May 24 solar flare. - Big Bear Solar Observatory Series, No.0364, 1994, 21 P.
    4. Kocharov L.G., Lee J.W., Wang H., Zirin H., Kovaltsov G.A., I.G.Usoskin - The 1991 March 22 Flare: Possible Anisotropy of High Energy Neutral Emission. - Big Bear Solar Observatory Series, No.0366, 1994, 23 P.
    5. L.G.Kocharov, G.A.Kovaltsov, V.G.Gueglenko, Yu.Yu.Kartavykh, G.E. Kocharov, I.G.Usoskin - High energy neutral radiation and particle acceleration in solar flares. - in: Nuclear Astrophysics, ed. G.E. Kocharov, Ioffe Phys.-Tech. Inst., St.Petersburg, 1991, p.5-62.
    6. Yu.E.Efimov and I.G.Usoskin - The programme for calculation of the neutron detector characteristics. - Ioffe Phys.Tech.Inst. Series, No.1525, Leningrad, 1991, 19p.
    7. Yu.E.Efimov and I.G.Usoskin - Calculation of the neutron telescope characteristics for solar neutron investigation. - Ioffe Phys.Tech.Inst. Series, No.1552, Leningrad, 1991, 27p.
    8. Yu.E.Efimov, G.E.Kocharov, I.G.Usoskin - The prospect of the solar neutron reasearch by neutron telescope - in: Nuclear Astrophysics , ed. G.E.Kocharov, Ioffe Phys.-Tech. Inst., St.Petersburg, 1991, p.123-146.
    9. I.G.Usoskin - The solar activity as a strange attractor - in: Bulletin of A.F.Ioffe Physico-Technical Institute. Young Scientists of the Institute in Utrecht . - Leningrad, 1990, 44p.
    10. G.E.Kocharov, G.A.Kovaltsov, I.G.Usoskin - Solar thermonuclear and flare neutrinos. - in: Neutrino Astrophysics , ed. G.E.Kocharov, Ioffe Phys.Tech.Inst., Leningrad, 1990, p.5-45.
    11. V.M.Ostryakov and I.G.Usoskin - The Sun as a stange attractor - in: High energy cosmic radiation , ed. G.E. Kocharov, Ioffe Phys.Tech.Inst., Leningrad, 1989, 200P. (in Russian)
    12. G.A.Kovaltsov and I.G.Usoskin - Generation of neutrino by high- energy protons at the Sun. - Ioffe Phys.Tech. Inst. Series, No.1289, Leningrad
    Updated : 2014