Journal Article

FZJ-2016-07742

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Directional gravity wave momentum fluxes in the stratosphere derived from high resolution AIRS temperature data

Ern, M. (Corresponding author)FZJ* ; Hoffmann, L.FZJ* ; Preusse, P.FZJ*

2017
Wiley Hoboken, NJ

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Please use a persistent id in citations: http://hdl.handle.net/2128/16020  doi:10.1002/2016GL072007

Abstract: In order to reduce uncertainties in modeling the stratospheric circulation, global observations of gravity wave momentum flux (GWMF) vectors are required for comparison with distributions of resolved and parametrized GWMF in global models. For the first time, we derive GWMF vectors globally from data of a nadir-viewing satellite instrument: we apply a 3D method to an Atmospheric Infrared Sounder (AIRS) temperature dataset that was optimized for gravity wave (GW) analysis. For January 2009, the resulting distributions of GW amplitudes and of net GWMF highlight the importance of GWs in the polar vortex and the summertime subtropics. Net GWMF is preferentially directed opposite to the background wind, and, interestingly, it is dominated by large amplitude GWs of relatively long horizontal wavelength. For convective GW sources, these large horizontal scales are in contradiction with traditional thoughts. However, the observational filter effect needs to be kept in mind when interpreting the results.

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Contributing Institute(s):

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

Research Program(s):

1. 244 - Composition and dynamics of the upper troposphere and middle atmosphere (POF3-244) (POF3-244)
2. 511 - Computational Science and Mathematical Methods (POF3-511) (POF3-511)

Appears in the scientific report 2017

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Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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