Impacts of nonlinear tidal-planetary wave interactions on the space-atmosphere interaction region
Abstract
Theory and past observations have provided evidence that atmospheric tides and other global scale waves may nonlinearly interact to produce additional secondary waves throughout the space-atmosphere interaction region (SAIR). However, the manifestation of these secondary waves and the extent of their impacts on SAIR are still poorly understood. This study focuses on the nonlinear interaction between the quasi two-day wave (QTDW) and migrating diurnal and semidiurnal tides (DW1 and SW2). The fundamental goal of this effort is to fully understand the factors that influence the secondary wave response in the space-atmosphere interaction region (SAIR). By using momentum and thermal forcing quantities derived from the NOGAPS-ALPHA reanalysis model, a linearized tidal model is utilized to compute secondary wave responses from 50 to 200 km. The modeling results predict that the secondary waves arising from the interaction between the QTDW and SW2, which include the 9.6hrW5 and 16hrE1, are capable of penetrating far into the SAIR due to their long vertical wavelength, high frequency and strong nonlinear forcing.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2016
- Bibcode:
- 2016AGUFMSA51A2415L
- Keywords:
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- 0305 Aerosols and particles;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 0340 Middle atmosphere: composition and chemistry;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 3303 Balanced dynamical models;
- ATMOSPHERIC PROCESSESDE: 3332 Mesospheric dynamics;
- ATMOSPHERIC PROCESSES