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Wind forced low frequency variability of the East Australia Current


Hill, KL and Rintoul, SR and Coleman, R and Ridgway, K, Wind forced low frequency variability of the East Australia Current, Geophysical Research Letters, 35, (L08602) pp. 1-5. ISSN 0094-8276 (2008) [Refereed Article]

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Copyright © 2008 American Geophysical Union

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DOI: doi:10.1029/2007GL032912


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. Citation: Hill, K. L., S. R. Rintoul, R. Coleman, and K. R. Ridgway (2008), Wind forced low frequency variability of the East Australia Current

Item Details

Item Type:Refereed Article
Keywords:East Australia Current, physical oceanography, western boundary currents, decadal ocean variabliity, air/sea interactions
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:Climate variability (excl. social impacts)
UTAS Author:Hill, KL (Ms Katrina Hill)
UTAS Author:Coleman, R (Professor Richard Coleman)
ID Code:55027
Year Published:2008
Web of Science® Times Cited:125
Deposited By:Centre for Marine Science
Deposited On:2009-03-04
Last Modified:2009-07-28
Downloads:5 View Download Statistics

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