Interannual Behavior of the OH Meinel Emission Profiles Determined From SABER Limb Measurements at 1.6- and 2.0-Microns

Physics

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0300 Atmospheric Composition And Structure, 0310 Airglow And Aurora, 0340 Middle Atmosphere: Composition And Chemistry, 0341 Middle Atmosphere: Constituent Transport And Chemistry (3334), 0355 Thermosphere: Composition And Chemistry

Scientific paper

We examine the global local time and latitudinal behavior of the OH Meinel emission by SABER in the two near IR bands (OH-A at ~ 2.0 microns and OH-B at ~ 1.6 microns). The behavior of the peak altitude of the derived volume emission rate and the intensity at the peak is remarkably consistent from year to year. Tidal influence is clearly present at low and mid latitudes. However at northern high latitudes in the January-March yaw cycle, distinct differences in the peak height and intensity are observed between 2004 and 2005. We investigate the possible cause of this interannual variation by also examining the interannual variation of the SABER derived atmospheric temperature/pressure profiles and using the output of the TIMEGCM coupled to a photochemical model of OH(v).

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