Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsa33a1067w&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SA33A-1067
Physics
0355 Thermosphere: Composition And Chemistry, 0358 Thermosphere: Energy Deposition (3369), 2427 Ionosphere/Atmosphere Interactions (0335), 2431 Ionosphere/Magnetosphere Interactions (2736), 2437 Ionospheric Dynamics
Scientific paper
Previous studies have shown that at low and middle latitudes zonal thermospheric winds can be significantly enhanced between ~150 km and 200km, forming westward jets during and after major geomagnetic storms. In this presentation we study these jets using the Coupled Magnetosphere-Ionosphere-Thermosphere (CMIT) model. We found that: 1) there are significant enhancements of westward neutral wind at low and middle latitudes during and after the storm around 180 km in the model simulations; 2) a diagnostic analysis of the model outputs indicates that momentum advection from the high latitudes to the low and middle latitudes are the cause of these neutral wind jets; and 3) the specific altitude range in which the jets occur is related to the height distribution of the ion drag coefficients at high latitudes.
Burns Alan G.
Killeen Tim L.
Solomon Stanley C.
Wang Wenhong
Wiltberger Michael
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