Refereed publications in 2018

  • 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.
  • Bushby, P. J., P.J. Käpylä,Y. Masada, A. Brandenburg, B. Favier, C. Guervilly,M.J. Käpylä, Large-scale dynamos in rapidly rotating plane layer convection, Astron. & Astrophys. in press, 2018.
  • Egorova, T., W. Schmutz, E. Rozanov, A.I. Shapiro, I. Usoskin, et al., Revised historical solar irradiance forcing, Astron. Astrophys., 615, A85, 2018.
  • Fleishman, G.D., and A. A. Pevtsov, Electric Currents in the Solar Atmosphere, Electric Currents in Geospace and Beyond, Geophysical Monograph 235, First Edition, 2018.
  • Hamada, A., T. Asikainen, I.I., Virtanen and K. Mursula, Automated identification of coronal holes from synoptic EUV maps, Solar phys., 293, 71, 2018.
  • Holappa, L. and K. Mursula, Explicit IMF By-dependence in high-latitude geomagnetic activity, J. Geophys. Res. in press, 2018.
  • Katsova, M.M., L.L. Kitchatinov, M.A. Livshits, D.L. Moss, D.D Sokoloff, I.G. Usoskin, Can Supeflares Occur on the Sun? A View from Dynamo Theory, Astron. Rep., 62, 72–80, 2018.
  • 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.
  • 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.
  • Koskela, J., I. I. Virtanen and K. Mursula, Southward shift of the coronal neutral line and the heliospheric current sheet: Evidence for radial evolution of hemispheric asymmetry, Astron. Astrophys., in press, 2018.
  • Käpylä, M. J., F. Gent, M. Väisälä, and G. Sarson, The supernova-regulated ISM. III. Generation of vorticity, helicity and mean flows, Astron. & Astrophys. in press, 2018.
  • Maliniemi, V., T. Asikainen and K. Mursula, Decadal variability in the Northern Hemisphere winter circulation: Effects of different solar and terrestrial drivers, J. Atm. Solar-Terr. Phys., 179, 40-54, 2018
  • Mishev, A. L., and 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, 2018.
  • Mishev, A., S. Tuohino and I.G. Usoskin Neutron monitor count rate increase as a proxy for dose rate assessment at aviation altitudes during GLEs, J. Space Weather Space Clim., 8, A46, 2018.
  • Mishev, A.L, I.G. Usoskin, O. Raukunen, M. Paassilta, E. Valtonen, L. Kocharov and R. Vainio First Analysis of Ground-Level Enhancement (GLE) 72 on 10 September 2017: Spectral and Anisotropy Characteristics, Solar phys. 293:136, 2018.
  • Mishev, A.L. and P.I.Y. Velinov, Ion production and ionization effect in the atmosphere during the Bastille day GLE 59 due to high energy SEPs Adv. Space Res., 61, 316-325, 2018.
  • Mursula, K., and L. Holappa, Principal component analysis of geomagnetic activity: New information on solar wind, Proceedings of IAU Symposium no. 335 on Space Weather of the Heliosphere: Processes and Forecasts, ed. C. Foullon and O. Malandraki,, International Astronomical Union, 2018.
  • Peitso, P., E. I. Tanskanen, T. Pulkkinen, and K. Mursula, High-frequency geomagnetic fluctuations at auroral oval and polar cap, Space Weather, 16, 2018.
  • Pekkilä, J., M.S. Väisälä and O. Anjum, Getting your hands dirty. Real-world physics solvers on GPUs, GPU Technology Conference, P8246, 2018.
  • 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 26Al in lunar samples, 618, A96, 2018.
  • Singh, N.K. M. J. Käpylä, A. Brandenburg, P. J. Käpylä, A. Lagg and I.I. Virtanen, Bihelical spectrum of solar magnetic helicity and its evolution, Astrophys. J., 863:182, 2018.
  • Tlatova, K., A. Tlatov, A.A. Pevtsov, K. Mursula, V. Vasil'eva; E. Heikkinen, L. Bertello. A. Pevtsov, I.I. Virtanen and N. Karachick, Tilt of sunspot bipoles in solar cycles 15 to 23, Solar phys., 293, 118, 2018.
  • 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.
  • 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.
  • Uusitalo, J. L. Arppe, T. Hackman, S. Helama, G. Kovaltsov, K. Mielikäinen, H. Mäkinen, P. Nöjd, V. Palonen, I. Usoskin, M. Oinonen, Solar superstorm of AD 774 recorded subannually by Arctic tree rings, Nature Comm., 9, 3495, 2018
  • Virtanen I.O.I., I.I. Virtanen, A.A. Pevtsov, and K. Mursula, Reconstructing solar magnetic fields from historical observations, III. Activity in one hemisphere is sufficient to maintain the magnetic cycle in both hemispheres, Astron. Astrophys., in press, 2018.
  • Väisälä, M., F. Gent, M. Juvela, M.J. Käpylä, The supernova-regulated ISM. IV. A comparison of simulated polarization with Planck observations, Astron. & Astrophys. in press, 2018.
  • Väisänen, P., I.G. Usoskin, and K Mursula, Structure of the power spectral density of galactic cosmic ray variation during 1953-2016, Proceedings of IAU Symposium no. 335 on Space Weather of the Heliosphere: Processes and Forecasts, ed. C. Foullon and O. Malandraki, International Astronomical Union, 2018.
  • Warnecke, J., M. Rheinhardt, S. Tuomisto, S. P.J. Käpylä, M.J. Käpylä and A. Brandenburg, Turbulent transport coefficients in spherical wedge dynamo simulations of solar-like stars, Astron. & Astrophys., 609, A51, 2018.
  • 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.
  • Wu, C.-J., N.A. Krivova, S.K. Solanki, I.G. Usoskin, Solar total and spectral irradiance reconstruction over the last 9000 years, Astron. Astrophys., 620, A120, 2018.
  • 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.
  • Refereed publications in 2017

  • Artamonov, A., I. Mironova, G. Kovaltsov, A. Mishev, E. Plotnikov, N. Konstantinova, Calculation of atmospheric ionization induced by electrons with non-vertical precipitation: Updated model CRAC-EPII Adv. Space Res., 59, 2295-2300, 2017.
  • Asikainen, T., Calibrated and corrected POES/MEPED energetic particle observations, chapter 3.3 in book “The ESPAS e-infrastructure: Access to data in near-Earth space”, Belehaki, A., M. Hapgood and J. Watermann eds., 978-2-7598-1949-2, 2017.
  • 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.
  • 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.
  • 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.
  • Burtseva, O., S. Gosain, and A.A. Pevtsov, Search for a signature of twist-removal in magnetic field of sunspots in relation with major flares, Astrophys. J., 849, 2, 2017
  • 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
  • Egeland, R., W. Soon, S. Baliunas, J. C. Hall, A. A. Pevtsov and L. Bertello, The Mount Wilson Observatory S-index of the Sun Astrophys. J., 835, 1, 25, 2017.
  • Evirgen, C. C., F.A. Gent, A. Shukurov, A. Fletcher and P. Bushby, The distribution of mean and fluctuating magnetic fields in the multiphase interstellar medium, Mon. Not. Royal. Astron. Soc., L105-L109, 464, 2017.
  • Gent, F., M.J. Käpylä and J. Warnecke, Long-term variations of turbulent transport coefficients in a solar-like convective dynamo simulation, Astron. Nachr, 338, 8, 885-895, 2017.
  • Getachew, T., I.I. Virtanen, and K. Mursula Structure of the photospheric magnetic field during sector crossings of the heliospheric magnetic field, Solar. Phys., 292, 174, 2017
  • Gil, A., and K. Mursula, Hale cycle and long-term trend in variation of galactic cosmic rays related to solar rotation, Astron. & Astrophys., 599, A112, 2017.
  • Grigorevskiy, A., N. Lawrence, S. Särkkä, Parallelizable sparse inverse formulation Gaussian processes (SpInGP), Proc. of 27th IEEE MLSP 2017, IEEE, 2017.
  • Hollins, J. F., G.R. Sarson, A. Shukurov, A. Fletcher, F.A. Gent, Supernova-regulated ISM. V. Space and Time Correlations, Astrophys. J., 850, 1, 1-18, 2017.
  • 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.
  • 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, 2017.
  • Koskela, J., I. I. Virtanen and K. Mursula, Comparing coronal and heliospheric magnetic fields over several solar cycles, Astrophys. J., 835, 63, 2017.
  • Käpylä, P. J., M. J. Käpylä, N. Olspert, J. Warnecke and A. Brandenburg, Convection-driven spherical shell dynamos at varying Prandtl numbers, Astron. Astrophys., 599, A4, 2017.
  • Käpylä, P.J., M. Rheinhardt, A. Brandenburg, R. Arlt, M. J. Käpylä, A. Lagg, N. Olspert and J. Warnecke, Extended Subadiabatic Layer in Simulations of Overshooting Convection, Astrophys. J. lett., 845:L23, 2017.
  • 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.
  • 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.
  • Lukianova, R., L. Holappa and K. Mursula, Centennial evolution of monthly solar wind speeds: Fastest monthly solar wind speeds from long-duration coronal holes, J. Geophys. Res. 122, 3, 2740–2747, 2017.
  • Matthes, K., B. Funke, M.E. Andersson, et al., Solar forcing for CMIP6 (v3.2), Geosci. Model Dev., 10, 2247–2302, 2017.
  • Mishev, A., S. Poluainov, and I. G. Usoskin, Assessment of spectral and angular characteristics of sub-GLE events using the global neutron monitor network Space Weather Space Clim., 7, A28, 2017.
  • Mursula, K., L. Holappa and R. Lukianova, Seasonal solar wind speeds for the last 100 years: Unique coronal hole structures during the peak and demise of the Grand Modern Maximum, Geophys. Res. Lett., 44, 30–36, 2017.
  • Nagovitsyn, Y. A., A.A. Pevtsov and A.A.Osipova, Long-term variations in sunspot magnetic field – area relation, Astron. Nachr., .338, 1, 26-34, 2017.
  • Olspert, N., M.J. Käpylä, J. Pelt, Method for estimating cycle lengths from multidimensional time series : Test cases and application to a massive 'in silico' dataset, Proc. of - 2016 IEEE International Conference on Big Data 2016 , 3214-3223, 2017.
  • 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.
  • Pekkilä, J., M.S. Väisälä, M.J. Käpylä, P.J. Käpylä, O. Anjum, Methods for compressible fluid simulation on GPUs using high-order finite differences, Computer Physics Communications, 217, 11-22, 2017.
  • Pekkilä, J., M.S. Väisälä, Break it up. Finding the perfect balance by pruning high-order stencils, GPU Technology Conference P7267, 2017.
  • Pelt, J., M.J. Käpylä and N. Olspert, Method of frequency dependent correlations: investigating the variability of total solar irradiance, Astron. Astrophys., 600, A9, 2017.
  • Pevtsov, A.A., Space Weather Forecasting and Supporting Research in the USA Geomagnetism and Aeronomy, 57, 7, 2017.
  • Poluianov, S., I. Usoskin, A. Mishev, M. Shea, D. Smart, GLE and Sub-GLE Redefinition in the Light of High-Altitude Polar Neutron Monitors. Sol. Phys., 292, 11, 2017.
  • 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.
  • Tanskanen, E.I., R. Hynönen, and K. Mursula, Seasonal variation of high-latitude geomagnetic activity in individual years, J. Geophys. Res. Space Phys., 122, 10, 2017.
  • Tanskanen, E., K. Snekvik, J.A. Slavin, D. Pérez-Suárez, A. Viljanen, M.L. Goldstein, M.J. Käpylä, R. Hynönen, L.V.T. Häkkinen, K. Mursula, Solar Cycle Occurrence of Alfvénic Fluctuations and Related Geo-Efficiency J. Geophys. Res. Space Phys., 122, 10, 2017.
  • Tlatov, A.G., A.A. Pevtsov, On the timing of the next great solar activity minimum, Adv. Space Res., 60, 5, 1108-1114,2017.
  • 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.
  • Usoskin, I.G. A history of solar activity over millennia, Living Rev. Sol. Phys. 14, 3, 2017.
  • Virtanen, I. I., and K. Mursula, Photospheric and coronal magnetic fields in six magnetographs: II. Harmonic scaling of field intensities Astron. Astrophys., 604, A7, 2017.
  • Virtanen I.O.I., I.I. Virtanen, A.A. Pevtsov, A. Yeates, and K. Mursula, Reconstructing solar magnetic fields from historical observations, II. Testing the surface flux transport model Astron. Astrophys., 604, A8, 2017.
  • Warnecke, J., M. Rheinhardt, P. J. Käpylä, M. J. Käpylä, A. Brandenburg, Turbulent transport coefficients in spherical wedge dynamo simulations of solar-like stars, Astron. & Astrophys., in press, 2017.
  • 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.

  • Refereed publications in 2016

  • Arsenovic, P., E. Rozanov, A. Stenke, B. Funke, J. M. Wissing, K. Mursula, F. Tummon, and T. Peter, The influence of Middle Range Energy Electrons on Atmospheric Chemistry and Climate, J. Atm. Solar-Terr. Phys., 149, 180–190, 2016.
  • Artamonov, A.A, A.L. Mishev I.G. Usoskin, Atmospheric ionization induced by precipitating electrons: Comparison of CRAC:EPII model with a parametrization model J. Atm. Solar-Terr. Phys, 149, 161-166, 2016.
  • 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.
  • 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(2), 1736-1743, 2016.
  • Asikainen, T., and M. Ruopsa, Solar wind drivers of energetic electron precipitation, J. Geophys. Res., 121 (3), 2209-2225, 2016..
  • Asvestari, E., and I. G. Usoskin, An empirical model of heliospheric cosmic ray modulation on long-term time scale, Space Weather Space Clim., 6, A15, 2016.
  • Cole, E.; Brandenburg, A.; Käpylä, P. J.; Käpylä, M. J.: Robustness of oscillatory α2 dynamos in spherical wedges, Astron. & Astrophys., 593, A134 2016.
  • Egeland, R., Soon, W., Baliunas, S. Hall, J.C., Pevtsov, A.A., Henry, G.W., Dynamo Sensitivity in Solar Analogs with 50 Years of Ca II H and K Activity, The proc. of the 19th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun , 2016.
  • Facsko, G., I. Honkonen, T. Zivkovic, L. Palin, E. Kallio, K. Ågren, H. Opgenoorth, E.I. Tanskanen, S. Milan, One year in the Earth's magnetosphere: A global MHD simulation and spacecraft measurements, Space Weather, 14, 5, 351 - 367, 2016.
  • Grigorievskiy, A., Y. Michea, M.J. Käpylä, A. Lendasse, Singular Value Decomposition update and its application to (Inc)-OP-ELM, Neurocomputing, 174, 99–108, 2016.
  • Hackman T., Lehtinen J., Rosén L., Kochukhov O., Käpylä M. J., Zeeman-Doppler imaging of active young solar type stars , Astron. & Astrophys., 587, A28, 7, 2016
  • Käpylä, P. J., A. Brandenburg, N. Kleeorin, M.J. Käpylä, I. Rogachevskii Magnetic flux concentrations from turbulent stratified convection, Astron. & Astrophys., 588, A150, 13, 2016.
  • Käpylä, M. J., P. J. Käpylä, N. Olspert, A. Brandenburg, J. Warnecke, B. B. Karak, J. Pelt, Multiple dynamo modes as a mechanism for long-term solar activity variations, Astron. & Astrophys., 598, A56, 24, 2016.
  • 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.
  • 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.
  • 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.
  • 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, 2016.
  • Maliniemi, V., T. Asikainen and K. Mursula, Effect of geomagnetic activity on the northern annular mode: QBO-dependence and the Holton-Tan relationship, J. Geophys. Res. Atmos., 121, 2016.
  • Martini, D., C. Argese, M. Di Loretto, and K. Mursula, Revisiting geomagnetic activity at auroral latitudes: No need for quiet curve removal, J. Geophys. Res., 121,7, 6307–6323, 2016.
  • Mishev, A and I. Usoskin, Analysis of the Ground-Level Enhancements on 14 July 2000 and 13 December 2006 Using Neutron Monitor Data Sol. Phys. 291, 1225, 2016. Related erratum
  • Mishev, A. and P. I. Y. Velinov, Ionization Effect Due to Cosmic Rays during Bastille Day Event – GLE 59 on Short and Mid Time Scales Comptes rendus de l’Académie bulgare des Sciences 69(11), 1479-1484, 2016.
  • Mishev, A.L., Contribution of cosmic ray particles to radiation environment at highmountain altitude: Comparison of Monte Carlo simulations with experimental data J. Enviroment. Radioact. 153, 15-22, 2016.
  • Munteanu, C., C. Negrea, M. Echim and K. Mursula, Effect of data gaps: Comparison of different spectral analysis methods, Ann. Geophys., 34, 437–449, 2016.
  • Nagovitsyn, Y.A., and A. A. Pevtsov, On the presence of two populations of sunspots, Astrophys. J., 833,1, 2016.
  • 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, 2016.
  • 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, 2016.
  • Pedersen M.G., V. Antoci, H. Korhonen, T.R. White, J. Jessen-Hansen, J. Lehtinen, S. Nikbakhsh, J. Viuho, Do A-type stars flare?, Mon Not R Astron Soc, 466, 3060-3076, 2016.
  • Pevtsov, A.A., L. Bertello, P. MacNeice and G. Petrie, What if we had a magnetograph at Lagrangian L5? Space Weather, 14, 2016.
  • Pevtsov, A.A., I.I. Virtanen, K. Mursula, A. G. Tlatov, and L. Bertello, Reconstructing solar magnetic fields from historical observations: I. Renormalized Ca K spectroheliograms and pseudo-magnetograms, Astron. Astrophys., 585, A40, 2016.
  • Poluianov, S. V., G. A. Kovaltsov, A. L. Mishev, and I. G. Usoskin, Production of cosmogenic isotopes 7 Be, 10 Be, 14 C, 22 Na, and 36 Cl in the atmosphere: Altitudinal profiles of yield functions, J. Geophys. Res. Atmos., 121, 2016.
  • Pulkkinen, T.I., Dimmock, A.P., Lakka, A., Osmane, A., Kilpua, E., Myllys, M., Tanskanen, E.I, Viljanen, A., Magnetosheath control of solar wind-magnetosphere coupling efficiency, J. Geophys. Res., 121, 8726, 2016.
  • Rosén, L., O. Kochukhov, T. Hackman, J. Lehtinen, Magnetic fields of young solar twins, Astron. Astrophys., 593, 1-24, 2016.
  • Roy, I., T. Asikainen, V. Maliniemi and K. Mursula, Comparing the influence of sunspot activity and geomagnetic activity on winter surface climate, J. Atm. Solar-Terr. Phys 149, 167–179, 2016.
  • 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.
  • 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, 2016.
  • Usoskin, I.G., 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.
  • 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.
  • 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.
  • Virtanen, I.I. and K. Mursula, Photospheric and coronal magnetic fields in six magnetographs: I. Consistent evolution of the bashful ballerina Astron. Astrophys., 591, A78, 2016.
  • Warnecke, J., Käpylä P. J., Käpylä M. J., Brandenburg A., Influence of a coronal envelope as a free boundary to global convective dynamo simulations, Astron. & Astrophys., . 596, A115, 2016.

  • Refereed publications in 2015

  • Brajsa, R., G. Verbanac, D. Sudar, I. Skokic, T. Zic, A. Hanslmeier, H. Wöhl, M. Roth, K. Mursula, and L. Zhang, A comparison between the observed and predicted amplitude of the 24th solar cycle, Cent. Eur. Astrophys. Bull., 37, 39, 1, 135-144, 2015.
  • Brandenburg, A., A.K. Hubbard, P.J. Käpylä, Dynamical quenching with non-local &alpha and downward pumping, Astron. Nachr., 336, 91-96, 2015.
  • Cole, E. M., Hackman T., Käpylä M. J., Ilyin I., Kochukhov O., N. Piskunov., Doppler Imaging of LQ Hya for 1998-2002, Astron. & Astrophys. , 581, A69, 2015.
  • 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.
  • Gil, A., and K. Mursula, Exceptionally strong variation of galactic cosmic ray intensity at solar rotation period after the maximum of solar cycle 24, Proc. of Science (ICRC2015) , 149, 8 p., 2015.
  • Gil, A., Usoskin, I.G., Kovaltsov, G.A., Mishev, A.L., Corti, C., Bindi, V, Can we properly model the neutron monitor count rate?, J. Geophys. Res. , in press 2015.
  • Holappa, L., and K. Mursula, Towards more reliable long-term indices of geomagnetic activity: Correcting a new inhomogeneity problem in early geomagnetic data, J. Geophys. Res., 120, 8288-8297, 2015.
  • Holappa, L., K. Mursula, and T. Asikainen, A new method to estimate annual solar wind parameters and contributions of stream structures to geomagnetic activity, J. Geophys. Res. , 119, 9407–9418, 2015.
  • Juusola, L., A. Viljanen, M. van de Kamp, E. I. Tanskanen, H. Vanhamäki, N. Partamies, and K. Kauristie, High-latitude ionospheric equivalent currents during strong space storms: Regional perspective, Space Weather, 13, 49-60, 2015
  • Juusola, L., K. Kauristie, M. van de Kamp, E. I. Tanskanen, K. Mursula, T. Asikainen, K. Andreeova, N. Partamies, H. Vanhamäki, and A. Viljanen, Solar wind control of ionospheric equivalent currents and their time derivatives, J. Geophys. Res., 120, 4971–4992, 2015.
  • Karak, B.B., P.J. Käpylä, M.J. Käpylä, A. Brandenburg, N. Olspert, J. Pelt, Magnetically controlled stellar differential rotation near the transition from solar to anti-solar profiles, Astron. & Astrophys. 576, A26, 2015.
  • Kilpua, K.E.J.; Lumme, E.; Andreeova, K.; Isavnin, A.; Koskinen, H. E. J., Properties and drivers of fast interplanetary shocks near the orbit of the Earth (1995-2013), J. Geophys. Res., 120, 6, 4112-4125, 2015
  • Kilpua, E., Olspert N., Grigorievskiy A., Käpylä M., Tanskanen E., Miyahara H., Kataoka R., Pelt J., Liu Y., Statistical study of strong and extreme geomagnetic disturbances and solar cycle characteristics, Astrophys. J. , 806, 272, 2015.
  • Käpylä, M.J., S. Solanki, I.G. Usoskin, Understanding Solar Activity, "Earth's climate response to a changing Sun", ed. T. Dudok de Wit et al., EDP Science Publ., p. 97-102, 2015.
  • Martini, D., K. Mursula, M. Orispää and H.-J. Linthe, Long-term decrease in the response of mid-latitude stations to high-speed solar wind streams in 1914-2000, J. Geophys. Res., 120, 2015.
  • 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 Science Rev., 194, 1, 1–96, 2015.
  • 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.
  • Mishev, A.L., and P.I.Y. Velinov, Time evolution of ionization effect due to cosmic rays in terrestrial atmosphere during GLE 70, J. Atmos. Solar-Terr. Phys., 129, 78-86, 2015.
  • Mishev, A.L., P. I. Y. Velinov, Determination of medium time scale ionization effects at various altitudes in the stratosphere and troposhphere durign ground level enchancement due to solar cosmic rays on 13.12.2006 (GLE 70) CR Acad. Bulg. of Sci., 68(11), 1425 - 1430, 2015
  • Mishev, A.L., P. I. Y. Velinov, Ionization rate profiles due to solar and galactic cosmic rays during GLE 59 on Bastille day 14 July 2000 CR Acad. Bulg. of Sci. 68(3), 359-366, 2015.
  • Mishev, A.L., F. Adibpour, I.G. Usoskin, E. Felsberger, Computation of dose rate at ight altitudes during Ground Level Enhancements No. 69, 70 and 71, Adv. Space Res., 55, 354-362, 2015.
  • Mursula, K., R. Lukianova, and L. Holappa, Occurrence of high-speed solar wind streams over the Grand Modern Maximum, Astrophys. J., 801, 1, 30, 2015.
  • Mursula, K. and E.I. Tanskanen, Variability and effects by solar wind, "Earth's climate response to a changing Sun", ed. T. Dudok de Wit et al., EDP Science Publ., p. 85-89, 2015.
  • Olspert, N., Käpylä M. J., Pelt J., Cole E. M., Hackman T., Lehtinen J., Henry G. W., Multiperiodicity, modulations and flip-flops in variable star light curves III. Carrier fit analysis of LQ Hya photometry for 1982-2014, Astron. & Astrophys. , 577, A120, 2015.
  • Pacini, A.A. and I.G. Usoskin, An Unusual Pattern of Cosmic-Ray Modulation During Solar Cycles 23 and 24, Solar Phys., 290, 943-950, 2015.
  • Pacini, A. A., I. G. Usoskin, K. Mursula, E. Echer, and H. Evangelista, Signature of a Sudden Stratospheric Warming in the near-ground 7Be flux, Atm. Environment, 113, 27-31, 2015.
  • 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
  • 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.
  • Singh, N. K., A. Brandenburg, S.M. Chitre, M. Rheinhardt, Properties of p and f modes in hydromagnetic turbulence Mon. Not. R. Astron. Soc., 447, 4, 3708-3722, 2015.
  • Snellman, J. E., P.J. Käpylä, M. J. Mantere, M. Rheinhardt, B. Dintrans, Testing turbulent closure models with convection simulations, Astron. Nachr, 336, 1, 32-52, 2015.
  • Solanki, S., M.J. Käpylä, I.G. Usoskin, Variations of Solar Activity, "Earth's climate response to a changing Sun", ed. T. Dudok de Wit et al., EDP Science Publ., p. 91 - 96, 2015.
  • Tanskanen, E.I. and P. Francia, Impact of solar variability on the magnetosphere, "Earth's climate response to a changing Sun", ed. T. Dudok de Wit et al., EDP Science Publ., p. 255 - 260, 2015.
  • Tlatov, A.G., K. A. Tlatova, V. V. Vasilyeva, A. A. Pevtsov, and K. Mursula, Properties of sunspot umbrae of leading and trailing polarity in 1917-2013, Adv. Space Res., 55, 3, p. 835–842, 2015.
  • Usoskin, I.G., R. Arlt, E. Asvestari, E. Hawkins, M. Käpylä, G.A. Kovaltsov, N. Krivova, M. Lockwood, K. Mursula, J. O'Reilly, M. Owens, C.J. Scott, D.D. Sokoloff, S.K. Solanki, W. Soon and J. Vaquero, The Maunder minimum (1645--1715) was indeed a Grand minimum: A reassessment of multiple datasets, Astron. Astrophys., 581, A95, 2015.
  • 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
  • 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.
  • Usoskin, I. G., and K. Mursula, Grand minima and maxima of solar activity, "Earth's climate response to a changing Sun", ed. T. Dudok de Wit et al., EDP Science Publ., p. 111-112, 2015.
  • 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.
  • 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.
  • Zhang, L., K. Mursula, and I. Usoskin, Solar surface rotation: N-S asymmetry and recent speed-up, Astron. Astrophys. Lett., 572, L2, 2015.
  • Refereed publications in 2014

  • Andreeova, K., et al., Analysis of double-step response to an interplanetary shock in the dayside magnetosphere, Annales Geophysicae., 32, 10, 1293-1302 10, 2014.
  • Asikainen, T., K. Mursula, Long-term evolution of corrected NOAA/MEPED energetic proton fluxes and their relation to geomagnetic indices, J. Atmos. Solar-Terr. Phys., 113, pp. 29-38, 2014.
  • Bazilevskaya, G.A., E.W. Cliver, G.A. Kovaltsov, A.G. Ling, M. Shea, D. Smart, I.G. Usoskin, Solar cycle in the heliosphere and cosmic rays, Space Sci. Rev., 186, 1-4, pp 409-435, 2014.
  • Cole, E., P. J. Käpylä, M. J. Mantere, A. Brandenburg, An Azimuthal Dynamo Wave in Spherical Shell Convection, Astrophys. J., 780, 2, L22, 6 pp. 2014.
  • D´Onofrio, M., N. Partamies and E.I. Tanskanen, Eastward electrojet enhancements during substorm activity, J. Atmos. Solar-Terr. Phys., 119, 129–137, 2014.
  • Grigorievskiy, A., M.J. Mantere, A. Akusok, E. Eirola, A. Lendasse, Forecasting the Outbursts of the Photometry Light Curve of Star V363 Lyr, Proc. of Int. Work Conf. on Time Series Analysis, 1, 520 - 531, 2014.
  • Guo, J., T.I. Pulkkinen, E.I. Tanskanen, X. Feng et al. Annual variations in westward auroral electrojet and substorm occurrence rate during solar cycle 23, J. Geophys. Res. , 119, 3, 2061, 2014.
  • Guo, J., Liu, H., Feng, X. T.I. Pulkkinen, E.I. Tanskanen et al., MLT and seasonal dependence of auroral electrojets: IMAGE magnetometer network observations, J. Geophys. Res. ,119, 4, 3179, 2014.
  • Holappa, L., K. Mursula, T. Asikainen and I.G. Richardson, Annual fractions of high speed streams from principal component analysis of local geomagnetic activity, J. Geophys. Res., 119, 6, 4544, 2014.
  • Juusola, L., S. E. Milan, M. Lester, A. Grocott, and S. M. Imber, Interplanetary magnetic field control of the ionospheric field-aligned current and convection distributions, J. Geophys. Res. 119, 3130-3149, 2014.
  • Juusola, L., et al., Interplanetary magnetic field control of the ionospheric field-aligned current and convection distributions, J. Geophys. Res. , 119, 4, 3130, 2014.
  • Juusola, et al., Statistical comparison of seasonal variations in the GUMICS-4 global MHD model ionosphere and measurements, Space weather, 11, 582–600, 2014.
  • Karak, B. B., Rheinhardt M., Brandenburg A., Käpylä P. J., Käpylä, M. J., Quenching and anisotropy of hydromagnetic turbulent transport, Astrophys. J., 795, 16, 2014.
  • Kovaltsov, G. A., I.G. Usoskin, E.W. Cliver, W.F. Dietrich and A.J. Tylka, Fluence Ordering of Solar Energetic Proton Events using Cosmogenic Radionuclides Data, Solar Phys., 289, 12, 4691-4700, 2014.
  • Käpylä, P. J., Mantere, M. J., Brandenburg, A., Confirmation of bistable stellar differential rotation profiles, Astron. & Astrophys., 570, A43, 2014.
  • Lindborg, M., Hackman, T., Mantere, M. J., Korhonen, H., Ilyin, I., Kochukhov, O., Piskunov, N., Doppler images of DI Psc during 2004-2006, Astron. & Astrophys., 562, A139, 2014.
  • Maliniemi, V., T. Asikainen, and K. Mursula, Spatial distribution of Northern Hemisphere winter temperatures during different phases of the solar cycle, J. Geophys. Res., 119, 2014.
  • Mishev, A.L. and P.I.Y. Velinov, Influence of hadron and atmospheric models on computation of cosmic ray ionization in the atmosphere - Extension to heavy nuclei, J. Atmos. Solar-Terr. Phys., 120, 111-120, 2014.
  • Poluianov, S., I. G. Usoskin, G. A. Kovaltsov, Cosmogenic isotope variability during Maunder minimum: Normal 11-year cycles are expected, Solar Phys., 289, 12, 4701-4709, 2014.
  • Poluianov, S., R. Traversi, I. G. Usoskin, Cosmogenic production and climate contributions to nitrate record in the TALDICE Antarctic ice core, J. Atmos. Solar-terr. Phys., 121 A, 2014.
  • Soon, W., V. M. Velasco Herrera, K. Selvaraj, R. Traversi, I. G. Usoskin, C. A. Chen, J. Lou, S. 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-Science Reviews, 134, pp. 1–15, 2014.
  • 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.
  • Usoskin, I.G., G. Hulot, Y. Gallet, R. Roth, A. Licht, F. Joos, G. A. Kovaltsov, E. Thébault and A. Khokhlov, Evidence for distinct modes of solar activity, Astron. Astrophys., 562, L10, 2014.
  • Väisälä, M. S., Brandenburg A., Mitra D., Käpylä P. J., Mantere M. J., Quantifying the effect of turbulent magnetic diffusion on the growth rate of the magneto-rotational instability, Astron. & Astrophys., 567, A139, 2014.
  • Väisälä, M. S., Harju, J., Mantere, M. J., Miettinen, O., Sault, R. S., Walmsley, C. M., Whiteoak, J. B., High-resolution ammonia mapping of the very young protostellar core Chamaeleon-MMS1, Astron. & Astrophys., 564, A99, 2014.
  • Warnecke, J., Käpylä, P. J., Käpylä, M. J., Brandenburg, A., On the cause of equatorward migration in global convective dynamo simulations, Astrophys. J. Letters, 796, L12, 2014.
  • Papers submitted recently for refereeing

  • Ayalew Getachew, T., I.I. Virtanen and K. Mursula, Asymmetric distribution of weak photospheric magnetic field values: Zero-offset and its relation to spatial resolution, Astrophys. J., submitted 2018.
  • Hynönen, R. E. Tanskanen and P. Francia Pc5 geomagnetic pulsations follow closely solar wind ultra-low frequency wave activity, J. Geophys. Res., submitted 2017.
  • Käpylä, P. J., Magnetic and rotational quenching of the Λ effect, Astron. Astrophys., submitted, 2018.
  • Olspert, N., J. Pelt, M.J. Käpylä, and J. Lehtinen, Estimating activity cycles with probabilistic methods I. Bayesian Generalised Lomb-Scargle Periodogram with Trend Astron. Astrophys., submitted, 2018.
  • Olspert, N., J.J. Lehtinen, M.J. Käpylä, J. Pelt and A. Grigorievskiy, Estimating activity cycles with probabilistic methods II. The Mount Wilson Ca H&K data, Astron. Astrophys., submitted, 2018.
  • Viviani, M., J. Warnecke, M.J. Käpylä, P.J. Käpylä, N. Olspert, E. Cole-Kodikara, J.J. Lehtinen, and A. Brandenburg, Transition from axi- to nonaxisymmetric dynamo modes in spherical convection models of solar-like stars, Astron. Astrophys., submitted, 2018.
  • Virtanen, I. I, A.A. Pevtsov and K. Mursula, Structure and evolution of the photospheric magnetic field in 2010 - 2017: Comparison of SOLIS/VSM vector field and BLOS potential field, Astrophys. J., submitted 2018.
  • Zieger, B., I.I. Virtanen, and K. Mursula , Spatial power spectrum of the photospheric, magnetic field during solar minimum, Astron. Astrophys, submitted, 2018.