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Interaction of jets and submesoscale dynamics leads to rapid ocean ventilation

Citation

Bachman, SD and Klocker, A, Interaction of jets and submesoscale dynamics leads to rapid ocean ventilation, Journal of Physical Oceanography, 50, (10) pp. 2873-2883. ISSN 0022-3670 (2020) [Refereed Article]


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DOI: doi:10.1175/JPO-D-20-0117.1

Abstract

Ocean ventilation is the process by which climatically important tracers such as heat and carbon are exchanged between the atmosphere and ocean interior. In this paper a series of numerical simulations are used to study the interaction of submesoscales and a topographically steered jet in driving rapid ventilation. The ventilation is found to increase both as a function of wind stress and model resolution, with a submesoscale-resolving 1/120° model exhibiting the largest ventilation rate. The jet in this simulation is found to be persistently unstable to submesoscale instabilities, which are known to feature intense vertical circulations. The vertical tracer transport is found to scale as a function of the eddy kinetic energy and mean isopycnal slope, whose behaviors change as a function of the wind stress and due to the emergence of a strong potential vorticity gradient due to the lateral shear of the jet. These results highlight the importance of jet–submesoscale interaction as a bridge between the atmosphere and the ocean interior.

Item Details

Item Type:Refereed Article
Keywords:baroclinic flows, barotropic flows, instability, turbulence, vertical motion
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical oceanography
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Oceanic processes (excl. in the Antarctic and Southern Ocean)
UTAS Author:Klocker, A (Dr Andreas Klocker)
ID Code:143190
Year Published:2020
Deposited By:Oceans and Cryosphere
Deposited On:2021-03-04
Last Modified:2021-03-04
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