New Caledonia surface lagoon chlorophyll modeling as coastal reef area health indicator
type: Dataset
description: The major part of the New Caledonia (NC) lagoon was classified as UNESCO Natural Site of Humanity Patrimony. Indeed, 22 175 km(2) of tropical coral lagoon area exhibit high biodiversity. The NC lagoon is semi enclosed and connected to the Coral Sea through a barrier reef segmented by narrow passes. The environment is oligotrophic, due to important flush during trade winds events, and bathymetry is highly variable. In order to predict eutrophication events, we used an extension of a 3D coupled physical-biogeochemical model recently developed on NC south western lagoon. The model is based on the Nitrogen and Carbon cycles, relating the variable stoechiometry of the elements in each biological compartment. The ecological model was developed to include an explicit description of the microbial loop. The resulting coupled model, forced by tide, wind, light, temperature and freshwater inputs, was used to calculate phytoplankton biomass, bacterial production, dissolved organic matter concentrations and nutrient recycling. Here we present results issued from the 3D coupled model ECO3M_LAGOON (biogeochemical, LOPB-IRD) and MARS3D (regional physical model, IFREMER-IRD) describing spatial and temporal interactions between water motion and biology, on larger domain including reef barrier and water exchanges through ocean-lagoon interface. To validate physical processes in the lagoon we used in situ data collected during field cruise (ValHyBio 2008, La Nina episode). Surface chlorophyll concentrations are compared with water color data from ValHyBio cruise and satellite date (MODIS/MERIS) corrected from bathymetry effects.
issued: 2026-05-20T16:44:59.131861
language: en
modified: 2026-05-20T16:44:59.131868
contact point: Organization
  fn: CCSD
keyword: 3d-coupled-model
keyword: biogeochemistry
keyword: circulation
keyword: conference-papers
keyword: dynamics
keyword: formulations
keyword: hydrodynamic
keyword: infoeu-reposemanticsconferenceobject
keyword: modeling
keyword: new-caledonia
keyword: ocean
keyword: phytoplankton
keyword: sduoceansciences-of-the-universe-physicsocean-atmosphere
keyword: simulations
keyword: south-west-lagoon
keyword: surface-chlorophyll
keyword: suspended-sediment-transport
keyword: sw-lagoon
keyword: temperature-profils
keyword: temporal-variability
landing page: REMOTE SENSING OF THE COASTAL OCEAN, LAND, AND ATMOSPHERE ENVIRONMENT

New Caledonia surface lagoon chlorophyll modeling as coastal reef area health indicator
type: Distribution
format: HTML
issued: 2026-05-20T16:44:59.168670
modified: 2026-05-20T16:44:59.065492
access URL: https://hal.science/hal-00691640

test_moissonnage_selune
type: Agent