Remote sensing of oligotrophic waters: model divergence at low chlorophyll concentrations.

Mehrtens, Hela and Martin, Thomas (2002) Remote sensing of oligotrophic waters: model divergence at low chlorophyll concentrations. Applied Optics, 41 (33). pp. 7058-7067. DOI 10.1364/AO.41.007058.

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Abstract

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−3, whereas for lower chlorophyll concentrations we found a significant overestimation of the OC2 algorithm.

Document Type: Article
Keywords: Remote sensing, oligotrophic waters, chlorophyll concentrations
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-ME Maritime Meteorology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1364/AO.41.007058
ISSN: 0003-6935
Date Deposited: 18 Feb 2008 17:25
Last Modified: 17 Oct 2019 07:21
URI: http://oceanrep.geomar.de/id/eprint/4304

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