New Zealand Journal of Marine and Freshwater Research abstracts

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Hydrographic observations during the Tasman Boundary Experiment off the West Coast of South Island, New Zealand

BASIL R.STANTON MICHAEL I. MOORE

New Zealand Oceanographic Institute National Institute of Water and
Atmospheric Research Ltd P. O. Box 14-901, Kilbirnie Wellington, New Zealand

Abstract Hydrographic observations over the west coast shelf during the Tasman Boundary Experiment (TASBEX) in 1986/87 are presented. Temperature changes over the shelf were related to mixed-layer development, shelf waves, and seasonal changes, with wind-driven upwelling being important close to the coast. During upwelling, a surface coastal current was observed and at times a weak undercurrent or countercurrent developed. Changes in freshwater inflow resulted in changes in the depth of the low-salinity surface layer. In the north, flows were generally weaker than in the south, where the shelf is narrow and the Southland Current dominates. Changes in the position and strength of the Southland Current were observed and on one occasion the response to a wind change event was a relaxation of the flow to a coastal Southland Current regime.

Keywords South Island; west coast; currents; temperature; salinity; density; upwelling

New Zealand Journal of Marine and Freshwater Research, 1992, Vol. 26: 339-358The Royal Society of New Zealand 1992
Received 8 October 1991; accepted 24 July 1992

PDF file of entire paper: medium quality (1975K); (scanned from paper original: notes about this process)

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