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Freshening of the Adelie Land Bottom Water near 140E


Aoki, S and Rintoul, SR and Ushio, S and Watanabe, S and Bindoff, NL, Freshening of the Adelie Land Bottom Water near 140 E, Geophysical Research Letters, 32, (23) pp. L23601. ISSN 0094-8276 (2005) [Refereed Article]

DOI: doi:10.1029/2005GL024246


Repeat summer hydrographic observations along 140E are used to document significant changes in the properties of the Adlie Land Bottom Water (ALBW) between the mid-1990s and 20022003. Water on the 28.35 kgm−3 neutral density surface cooled by 0.2C and freshened by 0.03 psu between 1994 and 2002. By re-occupying the same stations in the same season, the effects of seasonal variability and spatial variability were minimised allowing the signal of water mass changes to be clearly identified. Comparison of the recent data to high quality historical observations shows that the ALBW also freshened between the late 1960s and the mid-1990s. Although there is insufficient data to construct a continuous time series, the simplest explanation of the observed changes is that there has been a long-term (>30 year) and continuing freshening of the source waters supplying bottom water to the Australian-Antarctic basin.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical oceanography
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Adaptation to climate change
Objective Field:Social impacts of climate change and variability
UTAS Author:Bindoff, NL (Professor Nathan Bindoff)
ID Code:43490
Year Published:2005
Web of Science® Times Cited:80
Deposited By:IASOS
Deposited On:2006-08-01
Last Modified:2011-07-18

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