Thermospheric O/N2 in the Sunlit Disk From More Than Five Years of GUVI/TIMED Observations

Details Thermospheric O/N2 in the Sunlit Disk From More Than Five Years of GUVI/TIMED Observations Thermospheric O/N2 in the Sunlit Disk From More Than Five Years of GUVI/TIMED Observations

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsa41a0268c&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA41A-0268

Physics

0355 Thermosphere: Composition And Chemistry, 3369 Thermospheric Dynamics (0358)

Scientific paper

GUVI indirect observations of the thermospheric column density ratio, O/N2, in the sunlit hemisphere have been made on a nearly continuous basis from day 50 of 2002 to the present as part of the TIMED spacecraft mission. The basic large-scale spatial structure includes variations with local time (greater values in the morning), Universal Time (modulation at high latitudes due to the offset magnetic dipole), and season (greater values in the local winter hemisphere). These differences are seen to fade in the approach to solar minimum. Superposed on this reasonably well-behaved background structure are the complex, transient perturbations driven by auroral substorms and geomagnetic storms. The spatial and temporal variations are summarized in part by time-lapse movies

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