Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsa32a..04s&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SA32A-04
Physics
0355 Thermosphere: Composition And Chemistry, 0358 Thermosphere: Energy Deposition, 2423 Ionization Mechanisms
Scientific paper
Ionization by solar soft X-rays is a primary cause of non-auroral odd-nitrogen in the thermosphere, and the source of much of the variability of nitric oxide. Therefore, the long-standing problems of the reference level and amount of variability of solar soft X-ray irradiance are intertwined with the effort to obtain a consistent set of chemical rate coefficients that can describe thermospheric nitric oxide, and hence the thermal balance of the thermosphere through its radiation in the 5.3 micron band. Recent measurements of the solar EUV and X-ray irradiance, and of nitric oxide emissions, by the UARS, SNOE, TIMED, and SORCE satellites have yielded considerable new information that largely resolve earlier issues. These measurements are briefly reviewed, and a new method for introducing solar irradiance into thermospheric general circulation models is described. A chemical scheme for these models, the global distribution of nitric oxide and its cooling rates, and the effect on thermospheric temperature variation are presented.
Bailey Scott M.
Qian Liwen
Solomon Stanley C.
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