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Validation of (A)ATSR SST observations and comparison with AVHRR pathfinder SST data

Anne O'Carroll(1), Thomas Blackmore(1), Karsten Fennig(1) and Roger Saunders(1)

(1) Met Office, Fitzroy Road, Exeter EX1 3PB, United Kingdom

Abstract

Top of atmosphere brightness temperatures and skin sea surface temperatures (SSTs at 10 arc minute spatial resolution from the Advanced Along Track Scanning Radiometer (AATSR)on ENVISAT have now been collected at the Met Office in near-real time since 2002. Various processing have been performed on these data to convert from skin to foundation SST and to model and recognise diurnal warming effects in these observations.

The latest validation results of comparisons of AATSR skin and foundation SSTs against in situ SST observations, with other satellite SSTs, and with gridded climate SST datasets will be presented. The results show that that AATSR performs well within the 0.3K accuracy for which it was originally designed.

The series of Along Track Scanning Radiometer (ATSR) instruments have supplied high quality SST observations from 1991. The Advanced Very High Resolution Radiometer (AVHRR) pathfinder SST data is available from 1982. Investigations into the possible correction of AVHRR SSTs using ATSR SSTs as the truth comparing on a 1/4 degree grid is underway. The corrected AVHRR can then be used to continue the (A)ATSR record back in time from 1991. The latest results of this work will be presented.

 

Workshop presentation

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry