A Primary Validation of Remote AVHRR SST in Taiwan Strait and Its Vicinity

To estimate the accuracy of remote sensing SST in Taiwan Strait and its vicinity,the high(1.1 km,daily) and low(9 km,monthly) spatial-temporal resolution remote sensing AVHRR SST data are validated with the underway mapping SST and in-situ SST measured by CTD.Results of validation show that: both high and low resolution AVHRR SST products are consistent with two kinds of in-situ SST data.The accuracy of low resolution AVHRR PFSST is(0.09±1.40)℃ when compared with in-situ SST measured by CTD,which is the lowest of three comparison.The accuracy of high resolution AVHRR MCSST derived from local algorithm is(0.11±0.97)℃.This accuracy is equivalent with that of the SST products derived from LAC data with the NLSST algorithm.In upwelling zone of summer and warm-cold water fronts of winter,there is great difference between the low resolution PFSST and two kinds of in-situ SST data.The low resolution PFSST seems to weaken the actual SST fronts when it is used to detect these strong temperature gradient.However in conclusion,remote AVHRR SST data are fit to analyze the temporal and spatial variation of SST in Taiwan Strait and its vicinity.