Abstract

In the upper layer of the global ocean, 2082 in situ chlorophyll biomass values 〈Chl〉 are retrieved by concurrent satellite-derived inherent optical properties (IOP). It is found that (1) the phytoplankton absorption coefficient IOP alone does not provide satisfactory 〈Chl〉 retrieval; (2) the chromophoric dissolved organic matter (CDOM) absorption coefficient IOP must also be used to obtain satisfactory retrieval through 〈Chl〉 ∝ a ph + pa CDOM where p is a constant and a ph and a CDOM are, respectively, the phytoplankton and CDOM absorption coefficients; (3) the IOP-based 〈Chl〉 retrieval performance is comparable to standard satellite reflectance ratio retrievals (that have CDOM absorption intrinsically embedded within them); (4) inclusion of the total backscattering coefficient IOP does not contribute significantly to 〈Chl〉 retrieval; and (5) the new IOP-based algorithm may provide the possibility for future research to establish the actual role of extracellular CDOM from all sources in the intracellular production of chlorophyll biomass.

© 2004 Optical Society of America

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