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...
Published in: | Atmospheric Chemistry and Physics |
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Main Authors: | , , , , , , , |
Format: | Other Non-Article Part of Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2021
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Subjects: | |
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/ |
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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