Abstract
Geostrophic winds (vg) calculated over the East China Sea from surface pressure maps are compared to observed winds (vo) from a Japan Meteorological Agency Ocean Data Buoy for the period of January-April 1986. For mean winds, the average counterclockwise veering angle fromvg tov0 is 32° and there is no difference in speed. For fluctuating winds, the Ekman veering and speed reduction fromvg tov0 are respectively 16° and 2%. Co-spectral analysis of the two time series indicates very high coherency and a slight lead in phase by the buoy observations. The phase difference is consistent with the general movement of fronts from west to east and the fact that the geostrophic winds are calculated for a point 155 km to the southeast of the buoy.
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