Transport and variability of the Antarctic Circumpolar Current in Drake PassageRepeat hydrography on WOCE section SR1b from 1993 to 2000

Flux, AABW temperature and frontal position variability

 

Temperature anomaly of Antarctic Bottom Water recorded by a bottom pressure recorder on the SR1b line at 59.5°S (from [Rubython, 2001]). Red dots are point estimates from the closest CTD station. b) anomaly time series using CTD data. The Polar Front position (N/S) is taken from Figure 2 and the Antarctic Bottom Water flux is calculated by referencing geostrophic profiles to LADCP near bottom velocities.

  • Antarctic Bottom Water temperature anomalies with a maximum amplitude of 0.15 degrees C
  • timeseries from CTD data suggests a four year cycle of anomalies
Abstract More info...
Introduction More info...
Net average baroclinic transport in the Drake Passage More info...
Transport in neutral density layers More info...
LADCP results More info...
Comparison between Drake Passage (SR1) and Australia-Antarctica (SR3) sections More info...


Stuart A. Cunningham, Steven G. Alderson, Brian A. King and Mark A. Brandon
Profiling floats at SOC
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Alex Sen-Gupta alexg@maths.unsw.edu.au
Last Modified: 12/06/02
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