Surface and Upper Ocean Circulation from the combined use of in situ and space borne observations

Sandrine Mulet (CLS, France)


Nathalie Verbrugge (CLS, France); Hélène Etienne (CLS, France); Eric Greiner (CLS, France); Stéphanie Guinehut (CLS, France)

Event: 2019 Ocean Surface Topography Science Team Meeting

Session: Science II: Large Scale Ocean Circulation Variability and Change

Presentation type: Type Oral

Complementary to ocean state estimate provided by modelling/assimilation systems, a multi observation-based approach is available through the MULTI OSERVATIONS (MULTIOBS) Thematic Assembly Center (TAC) of the Copernicus Marine Environment Monitoring Service (CMEMS).

CMEMS MULTIOBS TAC proposes qualified global ocean products based on satellite and in situ observations and data fusion techniques. 4 MULTIOBS products are dedicated to ocean currents. Satellite observations (gravity from GOCE, altimetry, SST and SSS from SMOS), in situ observations (Argo floats and surface drifters), and ECMWF wind stress are used to generate 3D geostrophic currents and 2D geostrophic + Ekman currents at the surface and 15m. They are available in Near-Real-Time or as Multi-Year Products for the past 10 to 25 years.

Methods and products are presented. The performances of 3D and 2D currents are estimated thought comparison with independent data such as SVP drifters, Argo drifts at 1000m (YoMaHa database) and ADCP section at the equator. The interest of MULTIOBS for marine resources is illustrated with seals tracks. Finally, ongoing studies are presented such as the gains obtained with a data synergy between altimeter velocities and SST.

Oral presentation show times:

RoomStart DateEnd Date
The Forum Wed, Oct 23 2019,14:00 Wed, Oct 23 2019,14:15
Sandrine Mulet