Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsa41b0441w&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SA41B-0441
Physics
0310 Airglow And Aurora, 0340 Middle Atmosphere: Composition And Chemistry, 3359 Radiative Processes
Scientific paper
Emissions in the 15 μ m bands of CO2 are extremely important for the energy balance in the lower thermosphere, but uncertainty remains concerning the rate at which the principal excitation process, collision with atomic oxygen, proceeds. The SABER data set confirms that there is great variability in limb radiance profiles in this region, seen most prominently as local maxima ("knees") that appear frequently but unpredictably near 100-110 km. We examine these data in search of explanatory patterns, such as correlation of radiance levels with latitude, local time, and season. We combine this with a modeling effort to see how successfully the currently accepted modeling parameters can reproduce profiles found in the data, and discuss the implications of these patterns for atmospheric cooling rates.
Gordley Larry L.,
Mertens Chris J.
Mlynczak Martin G.
Picard Richard H.
Russell James M.
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