In the upper layer of the global ocean, 2082 <i>in situ</i> 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〉 ∝ <i>a</i><sub>ph</sub> + <i>pa</i><sub>CDOM</sub> where <i>p</i> is a constant and <i>a</i><sub>ph</sub> and <i>a</i><sub>CDOM</sub> 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
Paul E. Lyon, Frank E. Hoge, C. Wayne Wright, Robert N. Swift, and James K. Yungel, "Chlorophyll Biomass in the Global Oceans: Satellite Retrieval using Inherent Optical Properties," Appl. Opt. 43, 5886-5892 (2004)