Spectral features of the New Zealand deep-water ocean wave climate

Abstract

The wave climate at the Maui site off the west coast of the North Island and off the east coast of Great Barrier Island to the east of the North Island are examined. This is done by means of average wave spectra derived from a 2-year database, acquired from Waverider buoy measurements made over 1980 and 1981. The average spectra provide information about the individual sea states which characterise the wave climate, and show that on average the sea state on the east coast is less energetic than it is on the west coast. Further, it is seen that this difference results largely from a dominant and persistent long-period south-westerly swell of 12.4 s period which is present at the Maui location but absent from the Great Barrier Island seas. © The Royal Society of New Zealand 1992.