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The low to mid latitude thermospheric response to solar wind forcing during 2002-2005 storms as observed by the Champ/Star accelerometer

Chantal Lathuillere 1 Aurelie Marchaudon 2 Michel Menvielle 3
1 LPG - Laboratoire de Planétologie de Grenoble
2 LPCE - Laboratoire de physique et chimie de l'environnement
3 CETP - Centre d'étude des environnements terrestre et planétaires
Abstract : Total thermospheric density retrieved from the STAR accelerometer measurements made onboard CHAMP for years 2002 to 2005 is used to define a disturbance coefficient that characterizes the global perturbation of the low to mid latitude thermosphere associated to solar wind forcing. No projection of satellite data at a given altitude is performed, meaning that our results do not depend on a priori hypothesis on the atmospheric scale height. We focused on thermospheric storms that correspond to a global increase in thermospheric density at mid and low latitudes by more than 100 39 events are identified in our data base with a maximum number of occurrences in 2005. We will present a comparative study of these thermospheric storms in relation with magnetic activity indices and solar wind parameters at L1.
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https://hal-insu.archives-ouvertes.fr/insu-00361526
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Submitted on : Monday, February 16, 2009 - 10:15:27 AM
Last modification on : Wednesday, October 20, 2021 - 12:24:08 AM

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  • HAL Id : insu-00361526, version 1

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Chantal Lathuillere, Aurelie Marchaudon, Michel Menvielle. The low to mid latitude thermospheric response to solar wind forcing during 2002-2005 storms as observed by the Champ/Star accelerometer. 37th COSPAR Scientific Assembly, Jul 2008, Montréal, Canada. ⟨insu-00361526⟩

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