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| Titel |
Thermospheric response to interplanetary coronal mass ejections |
| VerfasserIn |
Manuela Temmer, Krauss Sandro, Helmut Lammer, Astrid Veronig, Mohammed Boudjada, Martin Pfleger, Martin Leitzinger, Oliver Baur, Bruno Besser |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250087655
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| Publikation (Nr.) |
 EGU/EGU2014-1713.pdf |
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| Zusammenfassung |
| We present a statistical analysis on the response of the Earth’s thermosphere to the impact of
interplanetary coronal mass ejections (ICMEs). Drag measurements from the GRACE
satellite during the time range 2003 – 2010 are analyzed. Observed density enhancements in
the Earth’s thermosphere could be associated to 20 ICMEs. For a sample of ICMEs
consisting of a magnetic cloud structure, we obtain characteristic parameters by applying the
force-free, constant-alpha flux rope model of interplanetary magnetic clouds. From this we
derive θ and Ï, angles determining the axis orientation of the fitted cylinder, B0 the
magnetic field strength in the center of the cloud from the fit, as well as helicity and
sonic Mach number. We relate these quantities to the drag and Dst measurements. |
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