Physics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsa31a..01s&link_type=abstract
American Geophysical Union, Spring Meeting 2009, abstract #SA31A-01
Physics
0310 Airglow And Aurora, 3332 Mesospheric Dynamics, 3334 Middle Atmosphere Dynamics (0341, 0342)
Scientific paper
Beginning with Lord Rayleigh's pioneering airglow observations in the 1920s, large variations in airglow emission rate at a given site, or between observations made at different locations were evident. For centuries before that, many individuals had experienced naked-eye observations of "bright nights", lasting one or several nights in succession. Early satellite observations showed that the airglow exhibited strong longitudinal variations, of wave 1 or wave 2, persisting for a few days at a time. Longitudinally varying observations from space on the same day are characterized by being taken at the same local time. Most of these observations were made for the O(1S), O2 Atm and OH emissions in the upper mesosphere and lower thermosphere, although variations of the O(1D) emission in the thermosphere have also been observed. The WINDII instrument on the UARS also observed longitudinal variations of the wind but the relationship to the airglow emissions varies from event to event. Comparison with TIME-GCM predictions show considerable similarity in the overall patterns of variation. For both the observational and model results the variations are smoothly varying, as for a wave 1, but at times display localized intense regions at specific longitudes. These results are described and discussed.
Roble Raymond G.
Shepherd Gordon G.
Zhang Sheng-Pan
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