Tidal Influence on the Oxygen and Hydroxyl Nightglows: WINDII Observations and TIME-GCM Simulations

Physics

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0355 Thermosphere--Composition And Chemistry, 3360 Remote Sensing, 3367 Theoretical Modeling, 3369 Thermospheric Dynamics (0358), 3384 Waves And Tides

Scientific paper

Longitudinal zonally averaged WINDII (on UARS) nighttime oxygen (O(1S)) and hydroxyl (P(3) line in the OH(8,3) Meinel band) volume emission rates exhibit dramatic spatial and temporal variations. The recently improved TIME-GCM produces simulations for the two airglows through the input of (1,1) upward propagating diurnal tides. The model simulations show excellent agreement with WINDII observations in both the local time domain and the latitudinal domain between 40S and 40N where the migrating diurnal tides are dominated. Further investigation is needed particularly for the absolute value of the oxygen emission rate, and the inter-hemispheric comparison of the oxygen emission rate.

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