Title: A Class-Based Approach to Characterizing and Mapping the Uncertainty of the MODIS Ocean Chlorophyll Product
Authors: DOWELL MarkMOORE TimothyCAMPBELL Janet
Citation: REMOTE SENSING OF ENVIRONMENT vol. 113 no. 11 p. 2424-2430
Publication Year: 2009
JRC N°: JRC54659
ISSN: 0034-4257
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC54659
DOI: 10.1016/j.rse.2009.07.016
Type: Articles in periodicals and books
Abstract: Global chlorophyll products derived from NASA's ocean color satellite programs have a nominal uncertainty of ± 35%. This metric has been hard to assess, in part because the data sets for evaluating performance do not reflect the true distribution of chlorophyll in the global ocean. A new technique is introduced that characterizes the chlorophyll uncertainty associated with distinct optical water types, and shows that for much of the open ocean the relative error is under 35%. This technique is based on a fuzzy classification of remote sensing reflectance into eight optical water types for which error statistics have been calculated. The error statistics are based on a data set of coincident MODIS Aqua satellite radiances and in situ chlorophyll measurements. The chlorophyll uncertainty is then mapped dynamically based on fuzzy memberships to the optical water types. The uncertainty maps are thus a separate, companion product to the standard MODIS chlorophyll product.
JRC Directorate:Sustainable Resources

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