The impact of Southern Ocean Bathymetry on the ocean circulation and overlying atmosphere ...

<!--!introduction!--> The presentation will focus around the impact that major topographic features in the Southern Ocean have on the path of the Antarctic Circumpolar Current (ACC), and their relatively unknown role in the coupled ocean-atmosphere system. We investigate their influence by res...

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Bibliographic Details
Main Authors: De Boer, Agatha, Hutchinson, David, Roquet, Fabien, Sime, Louise, Burls, Natalie, Heuze, Celine
Format: Conference Object
Language:unknown
Published: GFZ German Research Centre for Geosciences 2023
Subjects:
Antarctic
Campbell Plateau
Drake Passage
Kerguelen
Mid-Atlantic Ridge
Ross Sea
Southern Ocean
The Antarctic
Antarc*
Online Access:https://dx.doi.org/10.57757/iugg23-0810
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016649
Description
Summary:<!--!introduction!--> The presentation will focus around the impact that major topographic features in the Southern Ocean have on the path of the Antarctic Circumpolar Current (ACC), and their relatively unknown role in the coupled ocean-atmosphere system. We investigate their influence by respectively flattening the bathymetry around the Kerguelen Plateau, Campbell Plateau, Mid-Atlantic Ridge, and Drake Passage in four simulations in a coupled climate model. The barriers lead to an increase in the ACC transport of between 3% and 14% in the four simulations. The removal of Kerguelen Plateau bathymetry increases convection south of the plateau and the removal of Drake Passage bathymetry reduces convection upstream in the Ross Sea, affecting the deep overturning cell. When the barriers are removed, zonal flattening of the currents leads to SST anomalies upstream and downstream of their locations. Interestingly, these SST anomalies strongly correlate to precipitation in the overlying atmosphere, with ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...

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