nerc.ac.uk

Relative vs. absolute wind stress in a circumpolar model of the Southern Ocean.

Munday, David R. ORCID: https://orcid.org/0000-0003-1920-708X; Zhai, Xiaoming; Harle, James; Coward, Andrew C. ORCID: https://orcid.org/0000-0002-9111-7700; Nurser, A.J. George. 2021 Relative vs. absolute wind stress in a circumpolar model of the Southern Ocean. Ocean Modelling, 168, 101891. 20, pp. https://doi.org/10.1016/j.ocemod.2021.101891

Before downloading, please read NORA policies.
[img]
Preview
Text (Open Access)
© 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
1-s2.0-S146350032100144X-main.pdf - Published Version
Available under License Creative Commons Attribution 4.0.

Download (5MB) | Preview

Abstract/Summary

The transfer of momentum between the atmosphere and ocean is dependent upon the velocity difference between the seawater and overlying air. This is commonly known as relative wind, or ocean current interaction, and its direct effect is to damp mesoscale ocean eddies through the imposition of an opposing surface torque. If an ocean model neglects the ocean velocity in its bulk formulae, this can lead to an increase in power input to the ocean and a large increase in Eddy Kinetic Energy (EKE). Other secondary effects that are dependent upon the current system under consideration may also occur. Here we show that the neglect of relative wind leads to an ~50% increase in surface EKE in a circumpolar model of the Southern Ocean. This acts to increase the southwards eddy heat transport, fluxing more heat into the seasonal ice zone, and subsequently reducing ice cover in all seasons. The net reduction in planetary albedo may be a way for a largescale impact on climate.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1016/j.ocemod.2021.101891
ISSN: 1463-5003
Additional Keywords: Southern Ocean; mesoscale eddies; relative wind; current-wind interaction
Date made live: 06 Oct 2021 13:35 +0 (UTC)
URI: https://nora.nerc.ac.uk/id/eprint/530439

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...