Satellite-based analysis of thermosphere response to extreme solar flares

Sandro Krauss*, Martin Pfleger, Helmut Lammer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We present a refined algorithm to calculate pseudo solar indices, which enable the reproduction of a solar flare impact on the upper Earth's atmosphere for the empirical thermosphere model Jacchia-Bowman 2008. In a first step we compare the estimates of the new algorithm with those from a previous study by analysing an extreme X17.2 flare in 2003 using TIMED/SEE EUV observations. In a second step we adapt the method to use SOHO/SEM measurements within the algorithm and compare the findings with the previous results. Furthermore, the latter procedure is validated by means of GRACE density measurements during a X2.0 solar flare in November 2004. In each of the cases also a comparison with theoretical thermosphere models is performed, which shows a good agreement and suggests that the algorithm can support theoretical evolution studies in case no in situ density measurements during extreme solar events are available.

Original languageEnglish
Pages (from-to)1305-1309
Number of pages5
JournalAnnales Geophysicae
Volume32
Issue number10
DOIs
Publication statusPublished - 28 Oct 2014
Externally publishedYes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Geology
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

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