Computer Science
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.549e..14g&link_type=abstract
Proceedings of MERIS User Workshop (ESA SP-549). 10-13 November 2003, ESA-ESRIN, Frascati, Italy. Editor: H. Lacoste. Published
Computer Science
Scientific paper
MERIS on Envisat provides images of above-atmosphere spectral radiance in bands at 665, 681 and 709 nm, which were included in the baseline spectral band-set to allow detection of the fluorescence signal from surface chlorophyll in sea water, stimulated by ambient sun and sky light. Images of fluorescence derived from the level 1 MERIS data show significant patterns in coastal waters of western Canada. We compare the fluorescence signal levels with measurements of extracted chlorophyll from research cruises during 2002 and 2003, with satellite estimates of chlorophyll from the blue to green ratio observed by MERIS, and with fluorescence measurements made by MODIS. We present an average relation between fluorescence and surface chlorophyll concentration based on a simple model accounting for absorption of stimulating and emitted radiation by chlorophyll pigments, which gives a good fit to the observations. A possible difference is found between the relation for offshore waters and those in coastal straits and inlets.
Gower Jim
King Simon
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