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Water mass transformation by cabbeling and thermobaricity


Groeskamp, S and Abernathey, RP and Klocker, A, Water mass transformation by cabbeling and thermobaricity, Geophysical Research Letters, 43, (20) pp. 10,835-10,845. ISSN 0094-8276 (2016) [Refereed Article]

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Copyright Statement

Copyright 2016 American Geophysical Union

DOI: doi:10.1002/2016GL070860


Water mass transformation is an important process for the global ocean circulation. Nonlinearities in the equation of state of seawater lead to water mass transformation due to cabbeling and thermobaricity. Here the contribution of cabbeling and thermobaricity to water mass transformation is calculated in a Neutral Density framework, using temperature gradients derived from observationally based gridded climatologies and observationally based estimates of the spatially varying eddy diffusivities. It is shown that cabbeling and thermobaricity play a significant role in the water mass transformation budget, with cabbeling having a particularly important role in the formation of Antarctic Intermediate Water and Antarctic Bottom Water. A physical hypothesis is presented which explains why cabbeling is important for Antarctic Intermediate Water formation. It is shown that spatially varying estimates of eddy diffusivities are essential to correctly quantify the role of cabbeling to the formation of Antarctic Intermediate Water.

Item Details

Item Type:Refereed Article
Keywords:cabbbeling, nonlinear equation of state, Southern Ocean
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical oceanography
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Understanding climate change not elsewhere classified
UTAS Author:Klocker, A (Dr Andreas Klocker)
ID Code:113143
Year Published:2016
Funding Support:Australian Research Council (DE140100076)
Web of Science® Times Cited:32
Deposited By:Oceans and Cryosphere
Deposited On:2016-12-14
Last Modified:2018-11-13
Downloads:117 View Download Statistics

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