Articles | Volume 21, issue 13
Research article
 | Highlight paper
09 Jul 2021
Research article | Highlight paper |  | 09 Jul 2021

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

Markus Geldenhuys, Peter Preusse, Isabell Krisch, Christoph Zülicke, Jörn Ungermann, Manfred Ern, Felix Friedl-Vallon, and Martin Riese


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Short 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.
Final-revised paper