Middle atmosphere effects of the quasi-two-day wave determined from a General Circulation Model

• DOI: 10.1186/bf03353221
• Publication Date: 2014-08-15T03:28:51Z
• Authors: Scott E. Palo; Raymond G. Roble; Maura E. Hagan
• Keywords: Wavenumber; Atmospheric tide; Zonal flow (plasma); Atmospheric models

A set of numerical experiments have been conducted using the National Center for Atmospheric Research Thermosphere-Ionosphere-Mesosphere-Electrodynamics General Circulation Model (NCAR TIME-GCM) to understand effects quasi-two-day wave (QTDW) on middle atmosphere horizontal wind and temperature fields. zonal wavenumber three perturbation with a period 48 hours latitudinal structure identical (3, 0) Rossby-gravity mode has included at lower-boundary model. response in fields is observed qualitatively similar observations other model results. There also some evidence suggest an increase lower-thermosphere QTDW due interaction gravity waves. Changes are mean that clearly related QTDW, however it unclear if these changes direct result driving or from another source. Evidence nonlinear interactions between migrating tides presented. This includes significant (40–50%) decreases amplitude when present generation components which can be tracked back tides. Clear existence westward propagating six nonmigrating diurnal tidal component results