Analysis of Ground Level Enhancements (GLE): Extreme solar energetic particle events have hard spectra von Asvestari, E., Willamo, T., Gil, A., Usoskin, I.G., Kovaltsov, G.A., Mikhailov, V.V., Mayorov, A.

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Updated model of cosmic-ray-induced ionization in the atmosphere (CRAC:CRII_v3): Improved yield function and lookup tables von Usoskin, I.G., Kovaltsov, G.A., Mishev, A.L.

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Correlation between clouds at different altitudes and solar activity: Fact or Artifact? von Usoskin, I.G., Voiculescu, M., Kovaltsov, G.A., Mursula, K.

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Long-term persistence of solar active longitudes and its implications for the solar dynamo theory von Usoskin, I.G., Berdyugina, S.V., Moss, D., Sokoloff, D.D.

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Eccentric dipole approximation of the geomagnetic field: Application to cosmic ray computations von Nevalainen, J., Usoskin, I.G., Mishev, A.

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Reconstruction of Monthly and Yearly Group Sunspot Numbers From Sparse Daily Observations von Usoskin, I G, Mursula, K, Kovaltsov, G A

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Application of the Verified Neutron Monitor Yield Function for an Extended Analysis of the GLE # 71 on 17 May 2012 von Mishev, A. L., Koldobskiy, S. A., Usoskin, I. G., Kocharov, L. G., Kovaltsov, G. A.

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Long-Term Solar Cycle Evolution: Review of Recent Developments von Usoskin, I G, Mursula, K

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Atmospheric ionization induced by precipitating electrons: Comparison of CRAC:EPII model with a parametrization model von Artamonov, A.A., Mishev, A.L., Usoskin, I.G.

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Signature of a sudden stratospheric warming in the near-ground 7 Be flux von Pacini, A.A., Usoskin, I.G., Mursula, K., Echer, E., Evangelista, H.

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Computation of dose rate at flight altitudes during ground level enhancements no. 69, 70 and 71 von Mishev, A.L., Adibpour, F., Usoskin, I.G., Felsberger, E.

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Possible effect of strong solar energetic particle events on polar stratospheric aerosol: a summary of observational results von Mironova, I A, Usoskin, I G

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Signature of a sudden stratospheric warming in the near-ground 7Be flux von Pacini, A.A., Usoskin, I.G., Mursula, K., Echer, E., Evangelista, H.

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Cosmogenic 7Be in air: A complex mixture of production and transport von Leppänen, A.-P., Pacini, A.A., Usoskin, I.G., Aldahan, A., Echer, E., Evangelista, H., Klemola, S., Kovaltsov, G.A., Mursula, K., Possnert, G.

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Cosmic ray-induced ionization in the atmosphere: spatial and temporal changes von Usoskin, I.G., Gladysheva, O.G., Kovaltsov, G.A.

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Cosmogenic isotope 7Be: A case study of depositional processes in Rio de Janeiro in 2008–2009 von Pacini, A.A., Usoskin, I.G., Evangelista, H., Echer, E., de Paula, R.

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Regional millennial trend in the cosmic ray induced ionization of the troposphere von Usoskin, I.G., Mironova, I.A., Korte, M., Kovaltsov, G.A.

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Cosmogenic 7Be and 22Na in Finland: Production, observed periodicities and the connection to climatic phenomena von Leppänen, A.-P., Usoskin, I.G., Kovaltsov, G.A., Paatero, J.

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Introduction to Space Climate von Mursula, K., Usoskin, I.G., Maris, G.

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Case study of Forbush decreases: Energy dependence of the recovery von Jämsén, T., Usoskin, I.G., Räihä, T., Sarkamo, J., Kovaltsov, G.A.

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