CSIRO XBT PROGRAM
The XBTs ( Expendable Bathythermographs ) are devices designed to measure
the temperature of the upper ocean. They are deployed from moving vessels,
thus enabling a large coverage of the world's oceans, mostly between 30 degrees
North and 30 degrees South, and up to a depth of 800m. The XBT temperatures
are then used to obtain a description of the large-scale thermal structure
of the upper opcean, as a time-dependent system, on a long term basis.
CSIRO developed an XBT network under the auspices of the international
Tropical Ocean Global Atmosphere (TOGA) program, starting in 1983, and
the World Ocean Circulation Experiment (WOCE), starting in 1990. The
CSIRO network is a contribution to the international
TOGA/WOCE/IGOSS XBT network.
Since 1997, the XBT network has been an operational Australian
contribution to the Global Ocean Observing System (GOOS), jointly supported
by the Bureau of Meteorology and CSIRO.
Ongoing activity includes :
ANALYSIS OF FREQUENTLY REPEATED XBT LINES,
Seasonal and interannual variations in thermal structure are
analyzed along frequently repeated XBT routes in the Indian and
Pacific Oceans. The methods and results are presented here.
WOCE INDIAN OCEAN THERMAL DATA ASSEMBLY CENTER
The Centre's objective is to assemble the most comprehensive
UOT ( Upper Ocean Temperature ) data set available for the Indian Ocean over
the WOCE period (1990-96) and beyond, from both WOCE and non-WOCE contributors.
Links to details of the WOCE QC process, the WOCE data and analyses of that
data can be found here.
OCEAN OBSERVING NETWORK
On-going projects of the Ocean Observing Network include
analysis of high density sampling on routes in the Tasman
Sea and development of new sampling techniques and
instrumentation. Links to these and other data products can
be found here.
For more information contact
Last updated 5 November 1998 .
Copyright 1997-1998, CSIRO Australia
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