Journal Article

FZJ-2014-07037

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Sea surface temperature as a proxy for convective gravity wave excitation: a study based on global gravity wave observations in the middle atmosphere

Jia, J. Y. (Corresponding Author) ; Preusse, P.FZJ* ; Ern, M.FZJ* ; Chun, H.-Y. ; Gille, J. C. ; Eckermann, S. D. ; Riese, M.FZJ*

2014
Copernicus Katlenburg, Lindau

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Please use a persistent id in citations: http://hdl.handle.net/2128/8190  doi:10.5194/angeo-32-1373-2014

Abstract: Absolute values of gravity wave momentum flux (GWMF) deduced from satellite measurements by the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument and the High Resolution Dynamics Limb Sounder (HIRDLS) are correlated with sea surface temperature (SST) with the aim of identifying those oceanic regions for which convection is a major source of gravity waves (GWs). Our study identifies those latitude bands where high correlation coefficients indicate convective excitation with confidence. This is based on a global ray-tracing simulation, which is used to delineate the source and wind-filtering effects. Convective GWs are identified at the eastern coasts of the continents and over the warm water regions formed by the warm ocean currents, in particular the Gulf Stream and the Kuroshio. Potential contributions of tropical cyclones to the excitation of the GWs are discussed. Convective excitation can be identified well into the mid-mesosphere. In propagating upward, the centers of GWMF formed by convection shift poleward. Some indications of the main forcing regions are even shown for the upper mesosphere/lower thermosphere (MLT).

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Contributing Institute(s):

1. Stratosphäre (IEK-7)

Research Program(s):

1. 234 - Composition and Dynamics of the Upper Troposphere and Stratosphere (POF2-234) (POF2-234)

Appears in the scientific report 2014

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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