Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa41c..02s&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA41C-02
Physics
[0310] Atmospheric Composition And Structure / Airglow And Aurora, [0340] Atmospheric Composition And Structure / Middle Atmosphere: Composition And Chemistry, [3360] Atmospheric Processes / Remote Sensing
Scientific paper
Mesosphere-lower thermosphere (MLT) atomic oxygen densities, [O], have been retrieved from the Optical Spectrograph and InfraRed Imaging System (OSIRIS) observations of the O2 A-band airglow emission. Daytime atomic oxygen densities have been inferred from ozone densities that were retrieved from OSIRIS A-band dayglow observations, and nighttime [O] have been retrieved directly from A-band nightglow observations employing an iterative-Newtonian Optimal Estimation inversion technique. Low latitude results from 2007-2011 are presented and discussed. The seasonal variations of [O] are shown to be strongly influenced by the local photochemistry and are less dependent on dynamical variations. OSIRIS measurements are also compared to [O] predicted by the NRL-MSISE-00 model. The comparisons show that the derived OSIRIS densities at altitudes near 95 km in the Arctic are often an order of magnitude larger than the MSIS values, and that the seasonal oscillations of MSIS [O] are 180° out of phase with the OSIRIS measurements.
Gattinger R.
Llewellyn Edam J.
McDade Ian C.
Sheese Patrick E.
Strong Keith
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