Search Results - "Usoskin, Ilya G"

A history of solar activity over millennia by Usoskin, Ilya G.

“…Presented here is a review of present knowledge of the long-term behavior of solar activity on a multi-millennial timescale, as reconstructed using the…”
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A history of solar activity over millennia by Usoskin, Ilya G.

“…Here we review present knowledge of the long-term behaviour of solar activity on a multi-millennial timescale, as reconstructed using the indirect proxy…”
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A History of Solar Activity over Millennia by Usoskin, Ilya G.

“…Presented here is a review of present knowledge of the long-term behavior of solar activity on a multi-millennial timescale, as reconstructed using the…”
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Solar modulation parameter for cosmic rays since 1936 reconstructed from ground-based neutron monitors and ionization chambers by Usoskin, Ilya G., Bazilevskaya, Galina A., Kovaltsov, Gennady A.

“…The differential energy spectrum of galactic cosmic rays near Earth is often parameterized by the force field model with the only time‐dependent parameter, the…”
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Updated Neutron‐Monitor Yield Function: Bridging Between In Situ and Ground‐Based Cosmic Ray Measurements by Mishev, Alexander L., Koldobskiy, Sergey A., Kovaltsov, Gennady A., Gil, Agnieszka, Usoskin, Ilya G.

“…An updated yield function for a standard NM64 neutron monitor (NM) is computed and extended to different atmospheric depths from sea level to 500 g/cm 2 ( ∼5.7…”
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OCCURRENCE OF EXTREME SOLAR PARTICLE EVENTS: ASSESSMENT FROM HISTORICAL PROXY DATA by Usoskin, Ilya G, KOVALTSOV, GENNADY A

“…The probability of occurrence of extreme solar particle events (SPEs) with proton fluence (>30MeV) F sub(30) [> or =, slanted] 10 super(10) cm super(-2) is…”
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Extreme solar events by Cliver, Edward W., Schrijver, Carolus J., Shibata, Kazunari, Usoskin, Ilya G.

“…We trace the evolution of research on extreme solar and solar-terrestrial events from the 1859 Carrington event to the rapid development of the last twenty…”
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Energetic Particle Influence on the Earth’s Atmosphere by Mironova, Irina A., Aplin, Karen L., Arnold, Frank, Bazilevskaya, Galina A., Harrison, R. Giles, Krivolutsky, Alexei A., Nicoll, Keri A., Rozanov, Eugene V., Turunen, Esa, Usoskin, Ilya G.

“…This manuscript gives an up-to-date and comprehensive overview of the effects of energetic particle precipitation (EPP) onto the whole atmosphere, from the…”
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Neutron Monitors and Cosmogenic Isotopes as Cosmic Ray Energy‐Integration Detectors: Effective Yield Functions, Effective Energy, and Its Dependence on the Local Interstellar Spectrum by Asvestari, Eleanna, Gil, Agnieszka, Kovaltsov, Gennady A., Usoskin, Ilya G.

“…The method of assessment of galactic cosmic rays (GCR) variability over different timescales, using energy‐integrating ground‐based detectors such as a neutron…”
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Revisited Reference Solar Proton Event of 23 February 1956: Assessment of the Cosmogenic‐Isotope Method Sensitivity to Extreme Solar Events by Usoskin, Ilya G., Koldobskiy, Sergey A., Kovaltsov, Gennady A., Rozanov, Eugene V., Sukhodolov, Timofei V., Mishev, Alexander L., Mironova, Irina A.

“…Our direct knowledge of solar eruptive events is limited to several decades and does not include extreme events, which can only be studied by the indirect…”
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Cosmic ray induced ionization in the atmosphere: Full modeling and practical applications by Usoskin, Ilya G., Kovaltsov, Gennady A.

“…We present a physical model to calculate cosmic ray induced ionization in the atmosphere. The model is based on the Monte Carlo CORSIKA tool, which simulates…”
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Time Lag Between Cosmic-Ray and Solar Variability: Sunspot Numbers and Open Solar Magnetic Flux by Koldobskiy, Sergey A., Kähkönen, Riikka, Hofer, Bernhard, Krivova, Natalie A., Kovaltsov, Gennady A., Usoskin, Ilya G.

“…Solar magnetic activity drives the dominant 11-year cyclic variability of different space environmental indices, but they can be delayed with respect to the…”
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Effective Rigidity of a Polar Neutron Monitor for Recording Ground-Level Enhancements by Koldobskiy, Sergey A., Kovaltsov, Gennady A., Usoskin, Ilya G.

“…The “effective” rigidity of a neutron monitor for a ground-level enhancement (GLE) event is defined so that the event-integrated fluence of solar energetic…”
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A History of Solar Activity over Millennia by Usoskin, Ilya G.

“…Presented here is a review of present knowledge of the long-term behavior of solar activity on a multi-millennial timescale, as reconstructed using the…”
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Dynamics of the Earth’s Particle Radiation Environment by Vainio, Rami, Desorgher, Laurent, Heynderickx, Daniel, Storini, Marisa, Flückiger, Erwin, Horne, Richard B., Kovaltsov, Gennady A., Kudela, Karel, Laurenza, Monica, McKenna-Lawlor, Susan, Rothkaehl, Hanna, Usoskin, Ilya G.

“…The physical processes affecting the dynamics of the Earth’s particle radiation environment are reviewed along with scientific and engineering models developed…”
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Heliospheric modulation of cosmic rays: Monthly reconstruction for 1951–2004 by Usoskin, Ilya G., Alanko-Huotari, Katja, Kovaltsov, Gennady A., Mursula, Kalevi

“…The differential energy spectrum of galactic cosmic rays in the vicinity of the Earth can be parameterized by the so‐called force field model which has only…”
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An Anisotropic Cosmic-Ray Enhancement Event on 07-June-2015: A Possible Origin by Gil, Agnieszka, Kovaltsov, Gennady A., Mikhailov, Vladimir V., Mishev, Alexander, Poluianov, Stepan, Usoskin, Ilya G.

“…A usual event, called anisotropic cosmic-ray enhancement (ACRE), was observed as a small increase ( ≤ 5 % ) in the count rates of polar neutron monitors during…”
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A Solar Cycle Lost in 1793-1800: Early Sunspot Observations Resolve the Old Mystery by Usoskin, Ilya G, Mursula, Kalevi, Arlt, Rainer, Kovaltsov, Gennady A

“…Because of the lack of reliable sunspot observations, the quality of the sunspot number series is poor in the late 18th century, leading to the abnormally long…”
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Cosmic ray induced ionization model CRAC:CRII: An extension to the upper atmosphere by Usoskin, Ilya G., Kovaltsov, Gennady A., Mironova, Irina A.

“…A new version of the CRAC:CRII model computing ionization induced by cosmic rays in the atmosphere is presented, which is extended to the upper atmosphere and…”
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Solar Cycle in the Heliosphere and Cosmic Rays by Bazilevskaya, Galina A., Cliver, Edward W., Kovaltsov, Gennady A., Ling, Alan G., Shea, M. A., Smart, D. F., Usoskin, Ilya G.

“…Manifestations of the 11-year solar cycle and longer time-scale variability in the heliosphere and cosmic rays are considered. We briefly review the cyclic…”
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