Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsa21a..04b&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SA21A-04
Physics
0355 Thermosphere: Composition And Chemistry, 0358 Thermosphere: Energy Deposition
Scientific paper
Both the thermosphere and the ionosphere react to forcing from the magnetospherically imposed convection pattern. A twin-celled, neutral convection pattern is set up that normally follows the ion convection pattern. Like the tongue of ionization, which is created by ion convection advecting F2 region ions across the magnetic polar cap, there is a tongue of neutral composition in which gas from the dayside is advected across the polar cap. The composition in this tongue is characterized by less enhanced N2/O ratios than elsewhere in the polar cap and hence potentially less recombination. However, unlike the ionosphere, the thermosphere takes a considerable time to react to geomagnetic forcing. In solar maximum conditions this reaction can take 1 to 3 hours. In this study we use a thermosphere ionosphere nested grid (TING) simulation of a geomagnetic storm to determine whether this behavior of the thermosphere has any influence on the patches that are created by the model.
Burns Alan G.
Killeen Tim L.
Wang Wenhong
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