Energy sinks for lee waves in the northern South China Sea

Yang, Zhibin, Jing, Zhao and Zhai, Xiaoming (2023) Energy sinks for lee waves in the northern South China Sea. Journal of Geophysical Research - Oceans, 128 (1). ISSN 2169-9275

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Abstract

Recent observations report a discrepancy between observed energy dissipation rates and lee wave pressure flux predicted by linear theory in the Southern Ocean, raising the possibility that wave energy re-absorption by mean flows may be an important route to wave energy sink. Here we investigate the sink of lee waves in the northern South China Sea in a high-resolution nested model initialized with a synthetically-generated rough topography. Our results indicate that wave dissipation is the dominant sink of lee wave energy, with wave energy re-absorption being of secondary importance. The dominant direction of energy transfer is from mean flows to lee waves through vertical shear and horizontal strain of mean flows. A series of idealized experiments suggest that the weak wave energy re-absorption in the northern South China Sea is primarily due to the large Froude number there.

Item Type: Article
Additional Information: Data availability statement: The model configuration files and snapshots are available online (https://doi.org/10.7910/DVN/M2QSGG).
Uncontrolled Keywords: lagrangian filtering,lee waves,nested model,northern south china sea,wave dissipation,wave-mean flow interaction,oceanography,geophysics,geochemistry and petrology,earth and planetary sciences (miscellaneous),space and planetary science ,/dk/atira/pure/subjectarea/asjc/1900/1910
Faculty \ School: Faculty of Science > School of Environmental Sciences
Faculty of Science > School of Natural Sciences
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Depositing User: LivePure Connector
Date Deposited: 09 Jan 2023 13:32
Last Modified: 06 Feb 2023 10:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/90477
DOI: 10.1029/2022JC019060

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