Horizon 1 1 5 OS CH : Chapitres d'ouvrages scientifiques Remote sensing of the coastal ocean, land, and atmosphere environment Proceedings of SPIE SPIE Remote Sensing 2010 13 CYCLE BIOGEOCHIMIQUE CHLOROPHYLLE ABSORPTION REFLECTANCE TELEDETECTION DONNEES SATELLITE MODELE NOUVELLE CALEDONIE PACIFIQUE TROPICAL SUD OUEST 2010 2010/09/20-23 Bellingham SPIE fdi:010052111 ENG 0277-786X 10.1117/12.869888 https://www.documentation.ird.fr/hor/fdi:010052111 https://www.documentation.ird.fr/intranet/publi/depot/2011-06-29/010052111.pdf 7858 Horizon (IRD) We present data collected as part of VALidation HYperspectral of a BIOgeochemical model (ValHyBio), a PNTSsponsored program dedicated to chlorophyll satellite imaging and validation as affected by bathymetry in the South Western Tropical Lagoon of New Caledonia. 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, and - validate the biogeochemical model with field/satellite observations. The 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 at 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 database) are used. Satellite retrievals are examined as a function of bathymetry and for the special case of Trichodesmium red tides. The feasibility of a long-term monitoring program of water optical properties with satellite remote sensing techniques is examined in the frame of the GOPS (South Pacific Integrated Observatory). 126TELAPP05 ; 032MILPHY