TIROS–N Advanced Very High Resolution Radiometer (AVHRR) imagery has been used to study the temperature structure of the sea surface around the British Isles. We have combined the satellite imagery from both TIROS–N, METEOSAT, and conventional synoptic data to obtain a calibration for both 11 μm infrared channels, which gave sea surface temperatures accurate to ± 1 K. The changes in the sea surface temperature around the British Isles for 12 July 1979 are shown well by the satellite data. In particular, we have made a study of an anomalously warm patch in the North Sea that appeared at local noon over an area where the surface winds were weak, inhibiting surface mixing.

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