The performance of the OC2 Sea-viewing Wide Field-of-view Sensor (SeaWiFS) algorithm based on 490- and 555-nm water-leaving radiances at low chlorophyll contents is compared with those of semianalytical models and a Monte Carlo radiative transfer model. We introduce our model, which uses two particle phase functions and scattering coefficient parameterizations to achieve a backscattering ratio that varies with chlorophyll concentration. We discuss the various parameterizations and compare them with existent measurements. The SeaWiFS algorithm could be confirmed within an accuracy of 35% over a chlorophyll range from 0.1 to 1 mg m<sup>−3</sup>, whereas for lower chlorophyll concentrations we found a significant overestimation of the OC2 algorithm.
© 2002 Optical Society of America
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(290.1350) Scattering : Backscattering
(290.5850) Scattering : Scattering, particles
Hela Mehrtens and Thomas Martin, "Remote Sensing of Oligotrophic Waters: Model Divergence at Low Chlorophyll Concentrations," Appl. Opt. 41, 7058-7067 (2002)