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Comparisons of AATSR-Derived Sea Surface Temperature with Estimates from a Geostationary Satellite

During May and June 2003 the Australian RV Southern Surveyor was operating in the Gulf of Carpentaria, Northern Australia. Measurements of sea surface temperature (SST) were made using the ship’s thermosalinograph and a single-channel infrared radiometer. During this period the data from several space-borne instruments were obtained including those from AATSR, ATSR-2, MODIS, AVHRR, AMSR-E, and GLI. More recently coincident data from the GOES-9 geostationary satellite have also been obtained through the Australian Commonwealth Bureau of Meteorology and these data have been used to study the diurnal variation of the SST in the uppermost layers of the Gulf. This study gives a valuable insight into the development of techniques for blending satellitederived SSTs obtained at different times of the day. Low wind conditions are shown to be the most difficult and much care will be needed in future programs (such as GHRSST-PP) in blending satellite and ground-based data into a single SST product. Although the AATSR provides measurements with a narrower swath and less frequently than the other satellite instruments it appears that use of AATSR data may be vital in providing the best near-real-time estimates of global SST fields.