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Proceedings Paper

Monitoring optical properties of the southwest tropical Pacific
Author(s): Cécile Dupouy; Tatiana Savranski; Jérôme Lefevre; Marc Despinoy; Morgan Mangeas; Rosalie Fuchs; Vincent Faure; Sylvain Ouillon; Michel Petit
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Paper Abstract

We present data collected as part of ValHyBio- VALidation HYperspectral of a BIOgeochemical model in the South Western Tropical Lagoon of New Caledonia, a PNTS-sponsored program dedicated to chlorophyll satellite imaging and validation as affected by bathymetry. The specific goals of ValHyBio are to: - examine time-dependent oceanic reflectance in relation to dynamic surface processes, - construct field/satellite reflectance-based chlorophyll models, - investigate the feasibility of inverting the model to yield surface chlorophyll and turbidity, - validate the biogeochemical model with field/satellite observations. In situ bio-optical parameters include absorption coefficients by CDOM and particles, Secchi disk depth, backscattering coefficient, pigment concentration, suspended matter concentration, and K_dPAR. They are measured every month at 5 stations, of contrasted bathymetry and bottom reflectance, as well as at a reference station situated 4 miles offshore, and on a station over coral reefs. Remote sensing reflectance is calculated from the absorption and backscattering coefficients and compared with satellite data. SeaWIFS and MODIS AQUA match-ups collected over the period 1997-2010 (ValHySat-VALidation HYperspectral SATellite database) are used. Satellite retrievals are examined as a function of bathymetry. The feasibility of a longterm monitoring program of optical water retrieval with satellite remote sensing technique is examined in the frame of the GOPS (South Pacific Integrated Observatory).

Paper Details

Date Published: 3 November 2010
PDF: 14 pages
Proc. SPIE 7858, Remote Sensing of the Coastal Ocean, Land, and Atmosphere Environment, 78580J (3 November 2010); doi: 10.1117/12.869888
Show Author Affiliations
Cécile Dupouy, IRD-LOPB, CNRS, Univ. de la Méditerranée (New Caledonia)
Tatiana Savranski, IRD-LOPB, CNRS, Univ. de la Méditerranée (New Caledonia)
Jérôme Lefevre, IRD-LOPB, CNRS, Univ. de la Méditerranée (New Caledonia)
LEGOS-IRD (France)
Marc Despinoy, ESPACE-IRD (France)
Morgan Mangeas, ESPACE-IRD (France)
Rosalie Fuchs, IRD-LOPB, CNRS, Univ. de la Méditerranée (New Caledonia)
Vincent Faure, IRD-LOPB, CNRS, Univ. de la Méditerranée (New Caledonia)
Sylvain Ouillon, LEGOS-IRD (France)
Michel Petit, ESPACE-IRD (France)


Published in SPIE Proceedings Vol. 7858:
Remote Sensing of the Coastal Ocean, Land, and Atmosphere Environment
Robert J. Frouin; Hong Rhyong Yoo; Joong-Sun Won; Aiping Feng, Editor(s)

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