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Tasman Leakage of intermediate waters as inferred from Argo floats


Rosell-Fieschi, M and Rintoul, SR and Gourrion, J and Pelegri, JL, Tasman Leakage of intermediate waters as inferred from Argo floats, Geophysical Research Letters, 40, (20) pp. 5456-5460. ISSN 0094-8276 (2013) [Refereed Article]


Copyright Statement

Copyright 2013 American Geophysical Union

DOI: doi:10.1002/2013GL057797


We use Argo float trajectories to infer ocean current velocity at the sea surface and 1000 dbar near Australia. The East Australian Current flows southward along the east coast of Australia at both surface and intermediate levels, but only the intermediate waters leak round the southern tip of Tasmania and cross the Great Australian Bight. We calculate the transport of Antarctic Intermediate Water (AAIW) between the southern Australian coast and the Antarctic Circumpolar Current (ACC) as the velocity at 1000 dbar times the layer thickness. Between March 2006 and December 2012, the Eulerian AAIW transport through 147E ranges between 0 and 12.0 sverdrup (Sv). The mean Tasman Leakage of intermediate waters from the Pacific Ocean into the Indian Ocean, obtained using all Argo data until March 2013, is 3.8  1.3 Sv. The mean intermediate water transport into the Indian Ocean through 115E increases to 5.2  1.8 Sv due to contributions from the westward recirculation of ACC waters.

Item Details

Item Type:Refereed Article
Keywords:Argo program, East Australian Current, Southern Hemisphere supergyre, Tasman Leakage, Antarctic Intermediate Water, interbasin exchange
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:Rintoul, SR (Dr Steve Rintoul)
ID Code:94841
Year Published:2013
Web of Science® Times Cited:14
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2014-09-18
Last Modified:2017-11-01
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