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Laboratoire d’Etudes en Géophysique et Océanographie Spatiales

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by DYNOTROP — last modified Mar 17, 2021 12:01 PM

DYNOTROP team is dedicated to the study of the tropical oceans.

We are interested in the dynamics of ocean currents at regional and basin scales, and in scale interactions. We study the processes operating in the ocean surface layer, including fine-scale processes, and how  surface layer properties affect ocean-atmosphere interactions. We also focus on on oceanic and atmospheric teleconnections to/from the subtropics, in relation to the dominant modes of variability in the tropics, including interannual and decadal scale modes of variability (ENSO, IOD, PDO, Atlantic zonal and meridional modes).

The team's research can be presented under four main topics:

Tropical ocean dynamics: circulation and scale interactions (from fine scale to basin)
Ocean surface layer and ocean-atmosphere coupling
Tropical-subtropical interactions: mechanisms and impacts
Use and impact of observations in operational systems

To address these questions, DYNOTROP uses a wide range of tools, including numerical modelling, the collection of in situ observations and the analysis of in situ and space-based observations. We are responsible for two National Observation Services - the surface salinity network in the global ocean (SNO SSS) and the meteo-oceanic moorings network in the Tropical Atlantic (SNO PIRATA).We have organised several at-sea campaigns in the Tropical Atlantic (annual PIRATA campaigns) and in the Tropical Southwest Pacific (MoorSPICE, CASSIOPEE). The team is also involved in international observation projects (TPOS2020, TAOS). DYNOTROP is a user and producer of in situ data (organisation of oceanographic campaigns, deployment of gliders, moorings, Argo floats, drifters).

Team members also use satellite data (Jason altimetry satellites, AltiKa, Sentinel-3, MODIS water colour satellites, etc.) and are involved in the definition and use of satellite missions, such as SMOS, SWOT and STREAM.

We use and implement numerical simulations with community ocean models (NEMO, CROCO, SCHISM), atmospheric models (DREAM), coupled AO models (WRF, SIMBAD), and coupled physical-biogeochemical models (PISCES, BIO-EBUS). The team sets up regional simulations for its needs, and develops numerical modelling tools for hydrodynamic connections between river estuaries and the tropical ocean.

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