Journal Article

FZJ-2020-05418

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Determining Gravity Wave Sources and Propagation in the Southern Hemisphere by Ray‐Tracing AIRS Measurements

Perrett, J. A. (Corresponding author) ; Wright, C. J. ; Hindley, N. P. ; Hoffmann, L.FZJ* ; Mitchell, N. J. ; Preusse, P.FZJ* ; Strube, C.FZJ* ; Eckermann, S. D.

2021
Wiley Hoboken, NJ

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Please use a persistent id in citations: http://hdl.handle.net/2128/27126  doi:10.1029/2020GL088621

Abstract: Gravity waves (GWs) are key drivers of atmospheric circulation. Understanding their sources and propagation is essential to improving weather and climate models. We apply a 3D Stockwell Transform to one month of stratospheric temperature data from NASA's Atmospheric InfraRed Sounder to obtain 3D GW measurements and parameters. We use ray‐tracing methods to determine the sources and propagation characteristics of these GWs over the entire Southern Ocean. We trace 1.28 million GW measurements per day for the month of June 2010. Our analysis suggests that ground‐based sources around the Andes, Antarctic Peninsula and Kerguelen play major roles, and that the GWs generated by these and other sources travel large zonal distances. We show evidence that GWs propagate into the 60°S belt, a possible source of ‘missing momentum flux’ in GCMs at this latitude. These results emphasise the need for models to incorporate the possibility that GWs can exhibit large horizontal propagation.

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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)
2. Stratosphäre (IEK-7)

Research Program(s):

1. 5111 - Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups (POF4-511) (POF4-511)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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