Influence of along-shore advection and upwelling on coastal temperature atKaikoura Peninsula, New Zealand

Thermistor data from around Kaikoura Peninsula, New Zealand, show that in t he synoptic band, temperature fluctuations at 1 m are coherent with the alo ng-shore wind with a 90 degrees phase difference. At 5 mn, however, the coh erence is not as high, and the phase relationship is in the opposite sense, Along this coast, wind-driven advection of the coastal current and upwelli ng have opposite effects on temperature. A simple model is developed which has along-shore advection and upwelling terms parameterised in terms of the wind and two unknown coefficients. Solving for the coefficients shows that at 1 m, temperature variability is determined by along-shore advection, wh ereas at 5 in, temperature variability is determined principally by upwelli ng.