Wind forced low frequency variability of the East Australia Current

Hill, K. L. ORCID: https://orcid.org/0000-0002-6802-4098; Rintoul, S. R.; Coleman, R.; Ridgway, K. R.. 2008 Wind forced low frequency variability of the East Australia Current. Geophysical Research Letters, 35 (8). 10.1029/2007GL032912

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Official URL: http://dx.doi.org/10.1029/2007GL032912

Abstract/Summary

A 62 year record of temperature and salinity from a coastal station off southeast Australia shows a strong positive trend and quasi‐decadal variability but the cause of the observed changes has not been explained. The temperature and salinity variations are highly correlated. The increase in temperature and salinity with time agrees closely with the mean meridional gradient of water properties along the continental slope, suggesting that changes in strength of the poleward extension of the East Australian Current are responsible for the observed variability. Interannual temperature and salinity changes are correlated (r = 0.7) with basin‐scale winds and with transport through the Tasman Sea estimated from Island Rule, with the changes at the western boundary lagging the wind forcing by three years. We conclude that the trend and decadal variability in the coastal temperature and salinity record reflect the response of the subtropical gyre and western boundary current to basin‐scale wind forcing.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1029/2007GL032912
ISSN:	0094-8276
Date made live:	01 Oct 2020 13:21 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/528587

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1029/2007GL032912

ISSN:

0094-8276

Date made live:

01 Oct 2020 13:21 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/528587