Abstract
Methods of deriving the sea surface temperature from space are described in the infrared region of spectrum. This spectral region corresponds to the infrared channels of the Advanced Very High Resolution Radiometer (AVHRR) on board the NOAA-6 satellite. Thus the deviation of the sea surface temperature (SST) from the computed temperature by the use of the model atmosphere bounded by the ocean surface was evaluated for both daytime and night orbits. In the atmosphere the effect of cloud, water vapor, carbon dioxide, nitrogen molecule, methane and aerosols were taken into account, in addition to the surface emissivity which depends upon the ocean surface state. The brightness temperature measured by satellite represents that of a skin surface of water within a depth of a few microns. Hence this temperature is not always corresponding to that of ship data. The ship measures the temperature of a bulk water in a bucket. To find out the relationship between the brightness temperature by a radiometer and the real water temperature, measurements of water temperature was carried out at the water pool installed outside the Meteorological Research Institute under the various weather conditions.
Finally the data utilization of water vapor absorption band of 6-7μm and infrared window region ranging from 8 to 9μm, whose wavelength regions are not available on AVHRR radiometer, are evaluated.
