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Change in the Indonesian Throughflow with the climatic shift of 1976/77


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Wainwright, L, Meyers, G, Wijffels, SE and Pigot, L 2008 , 'Change in the Indonesian Throughflow with the climatic shift of 1976/77' , Geophysical Research Letters, vol. 35, no. L03604 , pp. 1-5 , doi: 10.1029/2007GL031911.

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A climate shift occurred in 1976 with Pacific equatorial
temperatures experiencing a sharp rise and was first identified
as a change in the background state of the El Nin˜o Southern
Oscillation. The associated weakening of easterly trade winds
across the Pacific led to our hypothesis that the Indonesian
Throughflow (ITF) had also weakened. The change in volume
transport of ITF before and after December 1975 was
estimated using all the available subsurface temperature data
on the IX1 expendable bathythermograph (XBT) line between
Australia and Indonesia. Sea surface temperature (SST) rose
by 1–2C, which could be due to increased air-sea heat flux
and/or a change in regional circulation. A subsurface cooling
in the main thermocline was attributed to a weakening of the
Pacific trade winds. The South Equatorial Current (SEC)
diminished in size and weakened in strength. The net westward
volume transport between Australia and Indonesia showed a
decrease of2.5 Sverdrups, or 23%. Citation: Wainwright, L.,
G. Meyers, S. Wijffels, and L. Pigot (2008), Change in the
Indonesian Throughflow with the climatic shift of 1976/77

Item Type: Article
Authors/Creators:Wainwright, L and Meyers, G and Wijffels, SE and Pigot, L
Keywords: Indonesian Throughflow, El Nino Southern Oscillation, XBT, sea surface temperature, South Equatorial Current
Journal or Publication Title: Geophysical Research Letters
ISSN: 0094-8276
DOI / ID Number: 10.1029/2007GL031911
Additional Information:

Copyright 2008 by the American Geophysical Union.

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