Changes in Neutral Composition During the Bastille Day 2000 Geomagnetic Storm

Details Changes in Neutral Composition During the Bastille Day 2000 Geomagnetic Storm Changes in Neutral Composition During the Bastille Day 2000 Geomagnetic Storm

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsa72b0533b&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SA72B-0533

Physics

0355 Thermosphere: Composition And Chemistry, 0358 Thermosphere: Energy Deposition

Scientific paper

Geomagnetic storms as large as the Bastille Day, 2000 event occur very infrequently. Such a great event presents a rare opportunity to study the thermosphere and ionosphere under conditions of very strong forcing. This presentation describes a study of the neutral composition changes that took place in the Bastille Day storm that has been undertaken using a Thermosphere-Ionosphere Nested Grid (TING) model simulation. The main results of this study are: 1) there is a large depletion in the O/N2 ratio that corresponds to the region of decreased electron densities in the middle and low latitudes over the Atlantic Ocean; 2) this region of depletions is partially isolated from the region of depletions at higher latitudes; 3) The region of depletions occurs as a result of advective processes.

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