Díaz, J.P., M. Arbelo, F.J. Expósito, G. Podestá, J.M.
Prospero, and R, Evans. 2001.
Relationship between errors in AVHRR-derived sea surface temperature and the TOMS Aerosol Index.
Geophysical Research Letters 28: 1989-1992.
ABSTRACT. We investigate the effects of various types of atmospheric
aerosols on satellite-derived sea surface temperature (SST) retrievals. The
association between aerosol presence identified by the Earth Probe Total Ozone
Mapping Spectrometer (TOMS) aerosol index (AI) and systematic errors in
Advanced Very High Resolution Radiometer (AVHRR) Pathfinder SST retrievals is
explored. We find a significant increase in systematic PFSST errors in the
presence of dust aerosols. Average errors range from 0.34°C for AI values between
0.5 and 1.0 to 1.74°C for AI >= 1.5. The bias is introduced by the AVHRR
brightness temperature difference (T4 - T5) which is
intended to correct for atmospheric absorption normally due primarily to water
vapor. Our study shows that (T4 - T5) is sensitive to the
dust aerosols (i.e., TOMS AI values). In contrast, smoke aerosols do not seem
to have a significant effect on PFSST errors.
© 2001 American Geophysical Union.