Orographically induced spontaneous imbalance within the jet causing a large-scale gravity wave event

A large-scale gravity wave (GW) was observed spanning the whole of Greenland. The GWs proposed in this paper come from a new jet-topography mechanism. The topography compresses the flow and triggers a change in u- and v-wind components. The jet becomes out of geostrophic balance and sheds energy in...

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Bibliographic Details
Published in:Atmospheric Chemistry and Physics
Main Authors: Geldenhuys, Markus, Preusse, Peter, Krisch, Isabell, Zülicke, Christoph, Ungermann, Jörn, Ern, Manfred, Friedl-Vallon, Felix, Riese, Martin
Format: Other Non-Article Part of Journal/Newspaper
Language:English
Published: Copernicus Publications 2021
Subjects:
Lidar
Greenland
Online Access:https://elib.dlr.de/143115/
https://elib.dlr.de/143115/1/acp-21-10393-2021.pdf
https://acp.copernicus.org/articles/21/10393/2021/
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Summary:A large-scale gravity wave (GW) was observed spanning the whole of Greenland. The GWs proposed in this paper come from a new jet-topography mechanism. The topography compresses the flow and triggers a change in u- and v-wind components. The jet becomes out of geostrophic balance and sheds energy in the form of GWs to restore the balance. This topography-jet interaction was not previously considered by the community, rendering the impact of the gravity waves largely unaccounted for.

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