Wind forced low frequency variability of the East Australia Current
Article first published online: 23 APR 2008
Copyright 2008 by the American Geophysical Union.
Geophysical Research Letters
Volume 35, Issue 8, April 2008
How to Cite
2008), Wind forced low frequency variability of the East Australia Current, Geophys. Res. Lett., 35, L08602, doi:10.1029/2007GL032912., , , and (
- Issue published online: 23 APR 2008
- Article first published online: 23 APR 2008
- Manuscript Accepted: 10 MAR 2008
- Manuscript Revised: 19 FEB 2008
- Manuscript Received: 7 DEC 2007
- East Australian Current;
- South Pacific Gyre;
- decadal variability
 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.