A Seasonal Study of Mesospheric Temperatures and Emission Intensities at Adelaide and Alice Springs

Details A Seasonal Study of Mesospheric Temperatures and Emission Intensities at Adelaide and Alice Springs A Seasonal Study of Mesospheric Temperatures and Emission Intensities at Adelaide and Alice Springs

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa21a0221g&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA21A-0221

Statistics

0310 Airglow And Aurora, 3332 Mesospheric Dynamics

Scientific paper

Aerospace imagers operating at Alice Springs (23d 42' S, 133d 53' E) and Adelaide (34d 55' S, 138d 36' 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. Here we show the climatology of emission temperatures and intensities over a wide range of timescales. Seasonal variation of emission temperatures and intensities are presented for each site, and agree reasonably well with results from TIME-GCM. Correlations between tidal and multi-day period waves in the model and in the data are also presented. The seasonal and latitudinal variations of shorter-period gravity waves are shown and it is found that while there are year-to-year variations the occurrence frequency peaks near summer solstice. The correlations of gravity wave occurrence and Australian rainfall statistics are also discussed.

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