New Zealand Journal of Marine and Freshwater Research abstracts

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Dynamics of the Cape Farewell upwelling plume, New Zealand

T. G. L. SfflRTCLIFFE M. I. MOORE*

Research School of Earth Sciences Victoria University of Wellington P.O. Box 600, Wellington, New Zealand
*Present address:

New Zealand Oceanographic Institute

, DSIR Marine and Freshwater, Department of Scientific and Industrial Research, Private Bag, Kilbirnie, Wellington, New Zealand

A. G. COLE

New Zealand Oceanographic Institute

A. B. VINER

Taupo Research Laboratory
DSIR Marine and Freshwater
Department of Scientific and Industrial Research
P.O. Box 415, Taupo, New Zealand

R. BALDWIN
B. CHAPMAN

New Zealand Oceanographic Institute

Abstract Hydrological observations made in January 1984 in the region near Cape Farewell, New Zealand, are described and previously published observations reviewed. It is shown that upwelling depends on the existence of the intermittent Westland Current, and is intensified by an onshore wind. Such a wind induces a fall in sea level near Cape Farewell, and the resulting favourable sea surface slope accelerates deep water over the bathymetric rise inshore of Kahurangi Shoals. The hydraulic response of the thermocline, coupled with a coastal convergence of the bottom Ekman flow, produce a strong upwelling source near Kahurangi Point.

Keywords Cape Farewell; Farewell Spit; Kahurangi; upwelling;

New Zealand Journal of Marine and Freshwater Research, 1990, Vol. 24: 555-568 Crown copyright 1990
Received 26 March 1990; accepted 4 October 1990

PDF file of entire paper: medium quality (1209K); (scanned from paper original: notes about this process)

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