Implications for atmospheric dynamics derived from global observations of gravity wave momentum flux in stratosphere and mesosphere

摘要: [1] In this work absolute values of gravity wave (GW) momentum flux are derived from global temperature measurements by the satellite instruments High Resolution Dynamics Limb Sounder (HIRDLS) and Sounding Atmosphere using Broadband Emission Radiometry (SABER). Momentum fluxes in stratosphere for both SABER whole mesosphere. The large-scale atmospheric background state is removed a two-dimensional Fourier decomposition longitude time, covering even planetary-scale waves with periods as short 1–2 days. Therefore, it possible to provide distributions GW observations first time Seasonal well longer-term variations distribution discussed. GWs likely contribute significantly equatorward tilt polar night jet poleward summertime mesospheric jet. Our results suggest that can undergo large latitudinal shifts while propagating upward. In particular, generated deep convection subtropical monsoon regions probably wind reversal at mid- high latitudes. Variations longitudinal caused those convectively still observed mesosphere could be important generation quasi two-day wave. Indications quasi-biennial oscillation (QBO) induced found subtropics. Also scales about one 11-year solar cycle might indicate negative correlation between flux.