Effects of Latitude-Dependent Gravity Wave Source Variations on the Middle and Upper Atmosphere

Atmospheric gravity waves (GWs) are generated in the lower atmosphere by various weather phenomena. They propagate upward, carry energy and momentum to higher altitudes, appreciably influence general circulation upon depositing them middle upper atmosphere. We use a three-dimensional first-principle model (GCM) with implemented nonlinear whole GW parameterization study global climatology of wave activity produced effects at altitudes up thermosphere. The numerical experiments were guided fluxes temperature variances as measured 2010 SABER (Sounding Atmosphere using Broadband Emission Radiometry) instrument onboard NASA’s TIMED (Thermosphere Ionosphere Mesosphere Energetics Dynamics) satellite. This includes latitudinal dependence magnitude stratosphere for boreal summer season. modeling results compared total absolute flux Upper Research Satellite (UARS) data mesosphere Simulations suggest that, order reproduce observed atmosphere, that smaller than have be used source level is because observations contain broader spectrum GWs, while parameterizations capture only portion relevant dynamics. Accounting variations improves simulations.