New Zealand Journal of Marine and Freshwater Research abstracts

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Velocity measurements in the East Auckland Current north-east of North Cape, New Zealand

Basil Stanton
Philip Sutton

National Institute of Water and Atmospheric
 Research Limited
P.O. Box 14 901, Kilbirnie
Wellington, New Zealand
email: p.sutton@niwa.co.nz

Abstract   Flow in the East Auckland Current (EAUC) system to the north-east of North Cape, New Zealand is examined using data from two current meter mooring arrays, with supporting data from conductivity/temperature/depth (CTD) and satellite altimetry. Variable currents up to 45 cm s^-1 were observed. The variability was partly attributable to changes in position and strength of the North Cape Eddy whose centre lies some 150 km offshore. The observed flows across the mooring line correlate well with those estimated from satellite altimetry. This gives confidence in the use of the satellite data to estimate the transport variability in the EAUC in the 1992-2001 period. No seasonal cycle was found in the volume transports but rather broadband variability at periods longer than 100 days.

Keywords  East Auckland Current; North Cape Eddy; currents

M02054 Received 5 July 2002; accepted 10 September 2002; Published 20 March 2003
New Zealand Journal of Marine and Freshwater Research, 2003, Vol. 37: 195-204
0028-8330/03/3701-0195 $7.00 © The Royal Society of New Zealand 2003

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