Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa12a..05s&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SA12A-05
Physics
0355 Thermosphere: Composition And Chemistry, 2427 Ionosphere/Atmosphere Interactions (0335), 2443 Midlatitude Ionosphere, 2736 Magnetosphere/Ionosphere Interactions (2431), 2788 Magnetic Storms And Substorms (7954)
Scientific paper
The geomagnetic storm of May 29-30, 2003 caused large decreases in the O/N2 column density ratio in the thermosphere. For this storm, O/N2 column density decreases of > 50% were observed to extend to mid-to-low latitudes with the FUV sensitive Polar/VIS Earth Camera. Simultaneously in the same region, the FUV sensitive TIMED/GUVI camera observed height profiles of the O/N2 ratio along its orbital track. The combination of the two data sets thus constitutes a 3-dimensional picture of the evolution of the thermosphere for this storm. The combined data set provides direct evidence that the molecular species N2 wells up from lower in the atmosphere. Subsequent ion-neutral reactions explain the observed corresponding decrease in the O densities. Details of the combined observations over the course of the storm will be discussed.
Paxton Larry J.
Sigwarth John B.
Zhang Yajing
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