University Of Tasmania

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Wind forced low frequency variability of the East Australia Current

journal contribution
posted on 2023-05-16, 22:59 authored by Hill, KL, Rintoul, SR, Richard ColemanRichard Coleman, Ridgway, K
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


Publication title

Geophysical Research Letters










Institute for Marine and Antarctic Studies


American Geophysical Union

Place of publication

United States

Rights statement

Copyright © 2008 American Geophysical Union

Repository Status

  • Restricted

Socio-economic Objectives

Climate variability (excl. social impacts)