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Proceedings Paper

Uncertainties in radiative transfer computations: consequences on the ocean color products
Author(s): Eric Dilligeard; Francis Zagolski; Juergen Fischer; Richard P. Santer
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Paper Abstract

Operational MERIS (MEdium Resolution Imaging Spectrometer) level-2 processing uses auxiliary data generated by two radiative transfer tools. These two codes simulate upwelling radiances within a coupled 'Atmosphere-Ocean' system, using different approaches based on the matrix-operator method (MOMO) and the successive orders (SO) technique. Intervalidation of these two radiative transfer codes was performed in order to implement them in the MERIS level-2 processing. MOMO and SO simulations were then conducted on a set of representative test cases. Results stressed both for all test cases good agreements were observed. The scattering processes are retrieved within a few tenths of a percent. Nevertheless, some substantial discrepancies occurred if the polarization is not taken into account mainly in the Rayleigh scattering computations. A preliminary study indicates that the impact of the code inaccuracy in the water leaving radiances retrieval (a level-2 MERIS product) is large, up to 50% in relative difference. Applying the OC2 algorithm, the effect on the retrieval chlorophyll concentration is less than 10%.

Paper Details

Date Published: 8 May 2003
PDF: 11 pages
Proc. SPIE 4892, Ocean Remote Sensing and Applications, (8 May 2003); doi: 10.1117/12.467279
Show Author Affiliations
Eric Dilligeard, HYGEOS SCOP (United States)
Francis Zagolski, PRIVATEERS N.V. (Canada)
Juergen Fischer, Freie Univ. Berlin (Germany)
Richard P. Santer, Univ. du Littoral Cote d'Opale (France)


Published in SPIE Proceedings Vol. 4892:
Ocean Remote Sensing and Applications
Robert J. Frouin; Yeli Yuan; Hiroshi Kawamura, Editor(s)

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