Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsa41a0289g&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SA41A-0289
Physics
3332 Mesospheric Dynamics, 3337 Global Climate Models (1626, 4928), 3389 Tides And Planetary Waves
Scientific paper
Aerospace imagers operating at Alice Springs (23° E) and Adelaide (34°S, 138° E) have collected more than five years of OH and O2A emission data. Images were taken over the course of each night at 5-minute intervals and used to determine OH Meinel (6,2) and O2 Atmospheric (0,1) band emission intensities and temperatures, as well as atmospheric gravity wave parameters. The NCAR general circulation model TIME-GCM was run for years 2002-2005 for comparison with these data. We present and discuss the seasonal variation of the two-day and quasi five-day waves at Adelaide and Alice Springs derived from airglow intensity measurements. Results from TIME-GCM runs, which include forcing from NCEP analysis fields, are presented for comparison, although the two-day wave is suppressed in the model. While the model often predicts the five-day waves, the observations show much greater year-to-year intensity variation. Explanations for this intensity variation will be explored, including the effects of gravity wave activity on both the two-day and five-day waves.
Gelinas Lynette Jean
Hecht James H.
Roble Raymond G.
Walterscheid Richard L.
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