Distribution and trend of wind power input to near-inertial motions in the Southern Ocean

Qian, Jiangchao, Zhai, Xiaoming, Wang, Zhaomin and Jochum, Markus (2023) Distribution and trend of wind power input to near-inertial motions in the Southern Ocean. Geophysical Research Letters, 50 (18). ISSN 0094-8276

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Wind power input to near-inertial motions is an important energy source for generating diapycnal mixing in the ocean. However, the distribution and long-term trend of this input over the Southern Ocean have yet to be quantified. In this study, we investigate the near-inertial wind power input (WPIi) to the Southern Ocean using a global eddy-permitting coupled ocean-sea ice model forced by a high-resolution atmospheric reanalysis product. Our results reveal a zonally asymmetric distribution of WPIi in the Southern Ocean, with the strongest input in the South Indian Ocean and the weakest in the South Pacific. The integrated WPIi between 30°S and 60°S exhibits a significant positive trend over the past four decades due to the intensification of mesoscale weather systems. The surface mixed-layer depth is found to modulate the spatial pattern and trend of WPIi by altering the surface near-inertial currents.

Item Type: Article
Additional Information: Data Availability Statement: ERA5 data were obtained from the European Centre for Medium-Range Weather Forecasts (https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels). The MITgcm code was obtained freely from http://mitgcm.org/. Our model data, configuration and input directories can be downloaded at https://doi.org/10.5281/zenodo.8298366. Funding information: This work was supported by the National Natural Science Foundation of China (NSFC) Projects (41941007; 41876220) and the Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) (313022009). XZ and MJ acknowledges support by a Royal Society International Exchanges Award (IES\R1\180037).
Uncontrolled Keywords: geophysics,earth and planetary sciences(all) ,/dk/atira/pure/subjectarea/asjc/1900/1908
Faculty \ School: Faculty of Science > School of Environmental Sciences
Faculty of Science > School of Natural Sciences
UEA Research Groups: Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 01 Sep 2023 16:30
Last Modified: 29 Sep 2023 08:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/92971
DOI: 10.1029/2023GL105411


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