Výsledky vyhledávání - "T. Asikainen"

Akademický článek

Outer Van Allen belt trapped and precipitating electron flux responses to two interplanetary magnetic clouds of opposite polarity

Autor: H. George, E. Kilpua, A. Osmane, T. Asikainen, M. M. H. Kalliokoski, C. J. Rodger, S. Dubyagin, M. Palmroth

Publikováno v: Annales Geophysicae, Vol 38, Pp 931-951 (2020)

Recently, it has been established that interplanetary coronal mass ejections (ICMEs) can dramatically affect both trapped electron fluxes in the outer radiation belt and precipitating electron fluxes lost from the belt into the atmosphere. Precipitat

Externí odkaz: https://doaj.org/article/a8b5f3ec519d4db29ab9f9529616edc3

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Akademický článek

Cosmic noise absorption signature of particle precipitation during interplanetary coronal mass ejection sheaths and ejecta

Autor: E. Kilpua, L. Juusola, M. Grandin, A. Kero, S. Dubyagin, N. Partamies, A. Osmane, H. George, M. Kalliokoski, T. Raita, T. Asikainen, M. Palmroth

Publikováno v: Annales Geophysicae, Vol 38, Pp 557-574 (2020)

We study here energetic-electron (E>30 keV) precipitation using cosmic noise absorption (CNA) during the sheath and ejecta structures of 61 interplanetary coronal mass ejections (ICMEs) observed in the near-Earth solar wind between 1997 and 2012. T

Externí odkaz: https://doaj.org/article/028c4c7bae7c4a6593928549ed40792e

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Akademický článek

Explicit IMF By Dependence in Geomagnetic Activity: Modulation of Precipitating Electrons

Autor: L. Holappa, T. Asikainen, K. Mursula

Publikováno v: Geophysical Research Letters, Vol 47, Iss 4, Pp n/a-n/a (2020)

Abstract The most important driver of geomagnetic activity is the north–south ( Bz) component of the interplanetary magnetic field (IMF), which dominates the solar wind‐magnetosphere coupling and all solar wind coupling functions. While the east�

Externí odkaz: https://doaj.org/article/4c464e79613a4bc8a2e6b74f53e87f7e

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Akademický článek

Motion of flux transfer events: a test of the Cooling model

Autor: R. C. Fear, S. E. Milan, A. N. Fazakerley, C. J. Owen, T. Asikainen, M. G. G. T. Taylor, E. A. Lucek, H. Rème, I. Dandouras, P. W. Daly

Publikováno v: Annales Geophysicae, Vol 25, Pp 1669-1690 (2007)

The simple model of reconnected field line motion developed by Cooling et al. (2001) has been used in several recent case studies to explain the motion of flux transfer events across the magnetopause. We examine 213 FTEs observed by all four Clus

Externí odkaz: https://doaj.org/article/532a5c38152f4a139a8dfa9f982d1beb

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Akademický článek

Reconnection and energetic particles at the edge of the exterior cusp

Autor: T. Asikainen, K. Mursula

Publikováno v: Annales Geophysicae, Vol 24, Pp 1949-1956 (2006)

In this paper we study flux transfer events (FTE) observed at the post-noon edge of the exterior cusp region by Cluster satellites. During the outbound dayside orbit on 2 February 2003, intense bursts of energetic particles were observed in close

Externí odkaz: https://doaj.org/article/e249e89beabd47478043aa2a55922f70

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Akademický článek

Energetic particle fluxes in the exterior cusp and the high-latitude dayside magnetosphere: statistical results from the Cluster/RAPID instrument

Autor: T. Asikainen, K. Mursula

Publikováno v: Annales Geophysicae, Vol 23, Pp 2217-2230 (2005)

In this paper we study the fluxes of energetic protons (30–4000 keV) and electrons (20–400 keV) in the exterior cusp and in the adjacent high-latitude dayside plasma sheet (HLPS) with the Cluster/RAPID instrument. Using two sample orbits we de

Externí odkaz: https://doaj.org/article/d3654a22737b4e3b8fef0f777c7866b2

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Akademický článek

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HEPPA III Intercomparison Experiment on Electron Precipitation Impacts: 1. Estimated Ionization Rates During a Geomagnetic Active Period in April 2010

Autor: H. Nesse Tyssøy, M. Sinnhuber, T. Asikainen, S. Bender, M. A. Clilverd, B. Funke, M. van de Kamp, J. M. Pettit, C. E. Randall, T. Reddmann, C. J. Rodger, E. Rozanov, C. Smith‐Johnsen, T. Sukhodolov, P. T. Verronen, J. M. Wissing, O. Yakovchuk

Publikováno v: Journal of Geophysical Research (JGR): Space Physics
e2021JA029128
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Journal of geophysical research / Space physics, 127 (1), e2021JA029128

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::517f3909baabea5154c5c921d38c7468

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