This title appears in the Scientific Report :
2017
Please use the identifier:
http://hdl.handle.net/2128/16020 in citations.
Please use the identifier: http://dx.doi.org/10.1002/2016GL072007 in citations.
Directional gravity wave momentum fluxes in the stratosphere derived from high resolution AIRS temperature data
Directional gravity wave momentum fluxes in the stratosphere derived from high resolution AIRS temperature data
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 dat...
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Personal Name(s): | Ern, M. (Corresponding author) |
---|---|
Hoffmann, L. / Preusse, P. | |
Contributing Institute: |
Jülich Supercomputing Center; JSC Stratosphäre; IEK-7 |
Published in: | Geophysical research letters, 44 (2017) 1, S. 475-485 |
Imprint: |
Hoboken, NJ
Wiley
2017
|
DOI: |
10.1002/2016GL072007 |
Document Type: |
Journal Article |
Research Program: |
Computational Science and Mathematical Methods Composition and dynamics of the upper troposphere and middle atmosphere |
Link: |
Published on 2017-01-05. Available in OpenAccess from 2017-07-05. Published on 2017-01-05. Available in OpenAccess from 2017-07-05. |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1002/2016GL072007 in citations.
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. |