Validation of Avhrr Sea Surface Temperature in the Northwest Pacific

The NOAA satellites HRPT data in the Northwest Pacific have been acquired by SeaSpace ground station located at Ocean University of China since October 2000. The Sea Surface Temperature (SST) have been retrieved from AVHRR onboard NOAA polar orbiting satellites using the TeraScan Desktop System. The SST data are validated with in situ buoy data from iQuam in the region 10°N-50°N, 105°E-145°E during the period of October 2000 to December 2017. The collocations of AVHRR and in situ buoy SST are generated with the spatial window of 0.01° and the temporal window of 0.5 h. The daytime and nighttime biases and standard deviations of the overall matchups for each satellite are -0.55±1.00°C and -0.35±0.94°C (NOAA-12 minus buoy), -0.21±0.69°C and -0.68±0.91°C (NOAA-14 minus buoy), -0.17 ±0.76°C and -0.40±0.88°C (NOAA-15 minus buoy), -0.27 ±0.62°C and -0.58±0.77°C (NOAA-16 minus buoy), -0.08 ±0.63°C and -0.37±0.75°C (NOAA-17 minus buoy), -0.29±0.66 °C and -0.52±0.77°C (NOAA-18 minus buoy), -0.21±0.68°C and -0.50±0.78°C (NOAA-19 minus buoy). The yearly statistics of the SST differences are investigated. The results indicate that the accuracy of the SST data is not consistent for each satellite during the different period. It is suggested that the HRPT data need be reprocessed.