First-authored, refereed papers of Ilya Usoskin, ordered by citations

A list of first-authored, refereed publications of Ilya Usoskin, derived from the SAO/NASA Astrophysics Data System (ADS) and ordered by the numbers of citations.

Orcid ID: 0000-0001-8227-9081

329	A history of solar activity over millennia Usoskin, Ilya G., 2017, Living Reviews in Solar Physics, 14, 3
328	Grand minima and maxima of solar activity: new observational constraints Usoskin, I. G., Solanki, S. K. & Kovaltsov, G. A., 2007, A&A, 471, 301
322	Heliospheric modulation of cosmic rays: Monthly reconstruction for 1951-2004 Usoskin, Ilya G., Alanko-Huotari, Katja, Kovaltsov, Gennady A. & Mursula, Kalevi, 2005, Journal of Geophysical Research (Space Physics), 110, A12108
210	Solar modulation parameter for cosmic rays since 1936 reconstructed from ground-based neutron monitors and ionization chambers Usoskin, Ilya G., Bazilevskaya, Galina A. & Kovaltsov, Gennady A., 2011, Journal of Geophysical Research (Space Physics), 116, A02104
201	The AD775 cosmic event revisited: the Sun is to blame Usoskin, I. G., Kromer, B., Ludlow, F., Beer, J., Friedrich, M., Kovaltsov, G. A., Solanki, S. K. & Wacker, L., 2013, A&A, 552, L3
192	The Maunder minimum (1645-1715) was indeed a grand minimum: A reassessment of multiple datasets Usoskin, Ilya G., Arlt, Rainer, Asvestari, Eleanna, Hawkins, Ed, Käpylä, Maarit, Kovaltsov, Gennady A., Krivova, Natalie, Lockwood, Michael, Mursula, Kalevi, O'Reilly, Jezebel, Owens, Matthew, Scott, Chris J., Sokoloff, Dmitry D., Solanki, Sami K., Soon, Willie & Vaquero, José M., 2015, A&A, 581, A95
160	A History of Solar Activity over Millennia Usoskin, Ilya G., 2013, Living Reviews in Solar Physics, 10, 1
160	Millennium-Scale Sunspot Number Reconstruction: Evidence for an Unusually Active Sun since the 1940s Usoskin, Ilya G., Solanki, Sami K., Schüssler, Manfred, Mursula, Kalevi & Alanko, Katja, 2003, Physical Review Letters, 91, 211101
148	Long-Term Solar Cycle Evolution: Review of Recent Developments Usoskin, I. G. & Mursula, K., 2003, Solar Physics, 218, 319
140	Cosmic ray induced ionization in the atmosphere: Full modeling and practical applications Usoskin, Ilya G. & Kovaltsov, Gennady A., 2006, Journal of Geophysical Research (Atmospheres), 111, D21206
136	Heliospheric modulation of cosmic rays during the neutron monitor era: Calibration using PAMELA data for 2006-2010 Usoskin, Ilya G., Gil, Agnieszka, Kovaltsov, Gennady A., Mishev, Alexander L. & Mikhailov, Vladimir V., 2017, Journal of Geophysical Research (Space Physics), 122, 3875
125	Solar activity during the Holocene: the Hallstatt cycle and its consequence for grand minima and maxima Usoskin, I. G., Gallet, Y., Lopes, F., Kovaltsov, G. A. & Hulot, G., 2016, A&A, 587, A150
111	A physical reconstruction of cosmic ray intensity since 1610 Usoskin, Ilya G., Mursula, Kalevi, Solanki, Sami K., Schüssler, Manfred & Kovaltsov, Gennady A., 2002, Journal of Geophysical Research (Space Physics), 107, 1374
110	A New Calibrated Sunspot Group Series Since 1749: Statistics of Active Day Fractions Usoskin, I. G., Kovaltsov, G. A., Lockwood, M., Mursula, K., Owens, M. & Solanki, S. K., 2016, Solar Physics, 291, 2685
109	A history of solar activity over millennia Usoskin, Ilya G., 2023, Living Reviews in Solar Physics, 20, 2
104	Occurrence of Extreme Solar Particle Events: Assessment from Historical Proxy Data Usoskin, Ilya G. & Kovaltsov, Gennady A., 2012, ApJ, 757, 92
103	Evidence for distinct modes of solar activity Usoskin, I. G., Hulot, G., Gallet, Y., Roth, R., Licht, A., Joos, F., Kovaltsov, G. A., Thébault, E. & Khokhlov, A., 2014, A&A, 562, L10
95	Correlative study of solar activity and cosmic ray intensity Usoskin, I. G., Kananen, H., Mursula, K., Tanskanen, P. & Kovaltsov, G. A., 1998, Journal of Geophysical Research, 103, 9567
92	Reconstruction of solar activity for the last millennium using 10Be data Usoskin, I. G., Mursula, K., Solanki, S., Schüssler, M. & Alanko, K., 2004, A&A, 413, 745
86	A Solar Cycle Lost in 1793-1800: Early Sunspot Observations Resolve the Old Mystery Usoskin, Ilya G., Mursula, Kalevi, Arlt, Rainer & Kovaltsov, Gennady A., 2009, ApJ, 700, L154
84	Ionization of the earth's atmosphere by solar and galactic cosmic rays Usoskin, Ilya G., Desorgher, Laurent, Velinov, Peter, Storini, Marisa, Flückiger, Erwin O., Bütikofer, Rolf & Kovaltsov, Gennady A., 2009, Acta Geophysica, 57, 88
83	A History of Solar Activity over Millennia Usoskin, Ilya G., 2008, Living Reviews in Solar Physics, 5, 3
77	Ionization effect of solar particle GLE events in low and middle atmosphere Usoskin, I. G., Kovaltsov, G. A., Mironova, I. A., Tylka, A. J. & Dietrich, W. F., 2011, Atmospheric Chemistry & Physics, 11, 1979
74	Heliospheric modulation of cosmic rays and solar activity during the Maunder minimum Usoskin, Ilya G., Mursula, Kalevi & Kovaltsov, Gennady A., 2001, Journal of Geophysical Research, 106, 16039
72	Solar proton events in cosmogenic isotope data Usoskin, Ilya G., Solanki, Sami K., Kovaltsov, Gennady A., Beer, Jürg & Kromer, Bernd, 2006, Geophysical Research Letters, 33, L08107
71	Cosmic ray-induced ionization in the atmosphere: spatial and temporal changes Usoskin, I. G., Gladysheva, O. G. & Kovaltsov, G. A., 2004, Journal of Atmospheric and Solar-Terrestrial Physics, 66, 1791
68	Was one sunspot cycle lost in late XVIII century? Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2001, A&A, 370, L31
66	Preferred sunspot longitudes: non-axisymmetry and differential rotation Usoskin, I. G., Berdyugina, S. V. & Poutanen, J., 2005, A&A, 441, 347
64	Cosmic ray induced ionization model CRAC:CRII: An extension to the upper atmosphere Usoskin, Ilya G., Kovaltsov, Gennady A. & Mironova, Irina A., 2010, Journal of Geophysical Research (Atmospheres), 115, D10302
62	Cyclic behaviour of sunspot activity during the Maunder minimum Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2000, A&A, 354, L33
61	Grand Minima of Solar Activity and the Mean-Field Dynamo Usoskin, I. G., Sokoloff, D. & Moss, D., 2009, Solar Physics, 254, 345
60	Production of cosmogenic 7Be isotope in the atmosphere: Full 3-D modeling Usoskin, Ilya G. & Kovaltsov, Gennady A., 2008, Journal of Geophysical Research (Atmospheres), 113, D12107
57	Latitudinal dependence of low cloud amount on cosmic ray induced ionization Usoskin, I. G., Marsh, N., Kovaltsov, G. A., Mursula, K. & Gladysheva, O. G., 2004, Geophysical Research Letters, 31, L16109
55	Solar activity reconstructed over the last 7000 years: The influence of geomagnetic field changes Usoskin, I. G., Solanki, S. K. & Korte, M., 2006, Geophysical Research Letters, 33, L08103
45	Cosmic rays and climate of the Earth: Possible connection Usoskin, Ilya G. & Kovaltsov, Gennady A., 2008, Comptes Rendus Geoscience, 340, 441
44	Solar activity, cosmic rays, and Earth's temperature: A millennium-scale comparison Usoskin, I. G., Schüssler, M., Solanki, S. K. & Mursula, K., 2005, Journal of Geophysical Research (Space Physics), 110, A10102
44	Revisited Reference Solar Proton Event of 23 February 1956: Assessment of the Cosmogenic-Isotope Method Sensitivity to Extreme Solar Events Usoskin, Ilya G., Koldobskiy, Sergey A., Kovaltsov, Gennady A., Rozanov, Eugene V., Sukhodolov, Timofei V., Mishev, Alexander L. & Mironova, Irina A., 2020, Journal of Geophysical Research (Space Physics), 125, e27921
43	Forbush decreases of cosmic rays: Energy dependence of the recovery phase Usoskin, I. G., Braun, I., Gladysheva, O. G., HöRandel, J. R., JäMséN, T., Kovaltsov, G. A. & Starodubtsev, S. A., 2008, Journal of Geophysical Research (Space Physics), 113, A07102
43	Correlation between clouds at different altitudes and solar activity: Fact or Artifact? Usoskin, I. G., Voiculescu, M., Kovaltsov, G. A. & Mursula, K., 2006, Journal of Atmospheric and Solar-Terrestrial Physics, 68, 2164
43	Heliospheric modulation strength during the neutron monitor era Usoskin, I. G., Alanko, K., Mursula, K. & Kovaltsov, G. A., 2002, Solar Physics, 207, 389
42	Role of centennial geomagnetic changes in local atmospheric ionization Usoskin, I. G., Korte, M. & Kovaltsov, G. A., 2008, Geophysical Research Letters, 35, L05811
42	Long-term persistence of solar active longitudes and its implications for the solar dynamo theory Usoskin, I. G., Berdyugina, S. V., Moss, D. & Sokoloff, D. D., 2007, Advances in Space Research, 40, 951
41	On the common solar signal in different cosmogenic isotope data sets Usoskin, Ilya G., Horiuchi, Kazuho, Solanki, Sami, Kovaltsov, Gennady A. & Bard, Edouard, 2009, Journal of Geophysical Research (Space Physics), 114, A03112
38	Reconstruction of Monthly and Yearly Group Sunspot Numbers From Sparse Daily Observations Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2003, Solar Physics, 218, 295
37	Long-Term Solar Activity: Direct and Indirect Study Usoskin, I. G. & Kovaltsov, G. A., 2004, Solar Physics, 224, 37
35	Dependence of cosmic rays on solar activity for odd and even solar cycles Usoskin, I. G., Mursula, K., Kananen, H. & Kovaltsov, G. A., 2001, Advances in Space Research, 27, 571
34	The lost sunspot cycle: Reanalysis of sunspot statistics Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2003, A&A, 403, 743
34	Short-term production and synoptic influences on atmospheric 7Be concentrations Usoskin, Ilya G., Field, Christy V., Schmidt, Gavin A., LeppäNen, Ari-Pekka, Aldahan, Ala, Kovaltsov, Gennady A., Possnert, GöRan & Ungar, R. Kurt, 2009, Journal of Geophysical Research (Atmospheres), 114, D06108
33	Lost sunspot cycle in the beginning of Dalton minimum: New evidence and consequences Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2002, Geophysical Research Letters, 29, 2183
31	Long-term solar activity reconstructions: direct test by cosmogenic 44Ti in meteorites Usoskin, I. G., Solanki, S. K., Taricco, C., Bhandari, N. & Kovaltsov, G. A., 2006, A&A, 457, L25
27	Robustness of Solar-Cycle Empirical Rules Across Different Series Including an Updated Active-Day Fraction (ADF) Sunspot Group Series Usoskin, Ilya, Kovaltsov, Gennady & Kiviaho, Wilma, 2021, Solar Physics, 296, 13
26	Regional millennial trend in the cosmic ray induced ionization of the troposphere Usoskin, I. G., Mironova, I. A., Korte, M. & Kovaltsov, G. A., 2010, Journal of Atmospheric and Solar-Terrestrial Physics, 72, 19
24	Mind the Gap: New Precise 14C Data Indicate the Nature of Extreme Solar Particle Events Usoskin, Ilya G. & Kovaltsov, Gennady A., 2021, Geophysical Research Letters, 48, e94848
23	Dependence of the Sunspot-Group Size on the Level of Solar Activity and its Influence on the Calibration of Solar Observers Usoskin, I. G., Kovaltsov, G. A. & Chatzistergos, T., 2016, Solar Physics, 291, 3793
22	Force-field parameterization of the galactic cosmic ray spectrum: Validation for Forbush decreases Usoskin, I. G., Kovaltsov, G. A., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bongi, M., Bonvicini, V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, P., Casolino, M., Castellini, G., De Donato, C., De Santis, C., De Simone, N., Di Felice, V., Formato, V., Galper, A. M., Karelin, A. V., Koldashov, S. V., Koldobskiy, S., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malakhov, V., Marcelli, L., Martucci, M., Mayorov, A. G., Menn, W., Mergé, M., Mikhailov, V. V., Mocchiutti, E., Monaco, A., Mori, N., Munini, R., Osteria, G., Palma, F., Panico, B., Papini, P., Pearce, M., Picozza, P., Pizzolotto, C., Ricci, M., Ricciarini, S. B., Rossetto, L., Sarkar, R., Scotti, V., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G. I., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N. & Zverev, V. G., 2015, Advances in Space Research, 55, 2940
21	The World Neutron Monitor Network as a tool for the study of solar neutrons Usoskin, I. G., Kovaltsov, G. A., Kananen, H. & Tanskanen, P., 1997, Annales Geophysicae, 15, 375
20	An Optical Atmospheric Phenomenon Observed in 1670 over the City of Astrakhan Was Not a Mid-Latitude Aurora Usoskin, I. G., Kovaltsov, G. A., Mishina, L. N., Sokoloff, D. D. & Vaquero, J., 2017, Solar Physics, 292, 15
16	The carbon-14 spike in the 8th century was not caused by a cometary impact on Earth Usoskin, Ilya G. & Kovaltsov, Gennady A., 2015, Icarus, 260, 475
9	Simulation of Sunspot Activity During Active Sun and Great Minima Using Regular, Random and Relic Fields Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2001, Solar Physics, 199, 187
9	Phase Evolution of Solar Activity and Cosmic-Ray Variation Cycles Usoskin, I. G., Kovaltsov, G. A., Kananen, H., Mursula, K. & Tanskanen, P. J., 1997, Solar Physics, 170, 447
8	Comment on the paper by Popova et al. "On a role of quadruple component of magnetic field in defining solar activity in grand cycles" Usoskin, Ilya G., 2018, Journal of Atmospheric and Solar-Terrestrial Physics, 176, 69
7	(1) Preferred longitudes in sunspot activity (2) Preferred sunspot longitudes: non-axisymmetry and differential rotation Usoskin, I. G., Berdyugina, S. V. & Poutanen, J., 2007, A&A, 464, 761
6	Sunspot cycles for the first millennium BC reconstructed from radiocarbon Usoskin, I., Chatzistergos, T., Solanki, S. K., Krivova, N., Kovaltsov, G., Brehm, N., Christl, M. & Wacker, L., 2025, A&A, 698, A182
5	Usoskin et al. Reply: Usoskin, Ilya G., Solanki, Sami K., Schüssler, Manfred & Mursula, Kalevi, 2004, Physical Review Letters, 92, 199002
5	Connections between neutron monitor count rate and solar modulation strength Usoskin, I. G., Gladysheva, O. G., Bobik, P., Kudela, K. & Kananen, H., 1999, Czechoslovak Journal of Physics, 49, 1743
4	Updated model of cosmic-ray-induced ionization in the atmosphere (CRAC:CRII_v3): Improved yield function and lookup tables Usoskin, I. G., Kovaltsov, G. A. & Mishev, A. L., 2024, Journal of Space Weather and Space Climate, 14, 20
3	Sensitivity of a neutron monitor to galactic cosmic rays Usoskin, I. G., Bobik, P., Gladysheva, O. G., Kananen, H., Kovaltsov, G. A. & Kudela, K., 2001, Advances in Space Research, 27, 565
1	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'' Usoskin, I. G. & Kovaltsov, G. A., 2010, Solar Physics, 261, 353
1	History of cosmic ray research in Finland Usoskin, I. G., Valtonen, E., Vainio, R., Tanskanen, P. J. & Aurela, A. M., 2009, Advances in Space Research, 44, 1232
0	Link Between Cosmic Rays and Clouds on Different Time Scales Usoskin, Ilya G. & Kovaltsov, Gennady A., 2006, Advances in Geosciences, Volume 2: Solar Terrestrial (ST) (Editors: Duldig, Marc), 2, p. 321
0	Nature's Third Cycle: A Story of Sunspots Usoskin, Ilya, 2015, American Journal of Physics, 83, 984