Exploring ocean eddy characteristics through the DynEd atlas

Yannice Faugere (CLS Space Oceanography Division, France)

CoAuthors

Antoine Delepoulle (CLS, France); Nicolas Granier (CLS, France); Alexandre Stegner (LMD, France); Briac Levu (LMD, France)

Event: 2019 Ocean Surface Topography Science Team Meeting

Session: Outreach, Education and Altimetric Data Services

Presentation type: Type Poster

The DynEd (Dynamic Eddy) database of surface intensified eddies has been built for a 17 year period (2000-2017) in two specific areas: the Mediterranean Sea and the Arabian Sea. This database contain the physical and the dynamical characteristics of mesoscale eddies detected from the cross analysis of DUACS gridded altimetric products (formerly distributed in AVISO, now in CMEMS) and Argo profiles. Among other characteristics the typical size, the intensity and the trajectory of each detected eddy were calculated. An iterative method was used on the surface geostrophic velocities in order to compute the cyclogeostrophic velocity components. The addition of these ageostrophic terms leads to a significant velocity increase for some mesoscale anticyclones. Then, the estimations of the three-dimensional eddy structures were deduced from the co-localization of surfacing Argo temperature/salinity data into altimeter-detected eddy areas. We were then able to quantify the typical temperature, salinity and density anomalies associated to the recurrent mesoscale anticyclones which control the regional circulation of the Mediterranean Sea.

A Graphical User Interface was developed to easily explore the database and enable the collocation of eddies with both Space (SST and Ocean Color) and in situ observations. This work showed that the combination of DUACS products and the in-situ Argo data sets could provide a regional characterization of the three-dimensional structure of individual eddies, far beyond the classical composite eddy analysis. A presentation of the Dyned Atlas tool and database will be given here.


 

Poster show times:

Room Start Date End Date
The Gallery Tue, Oct 22 2019,16:15 Tue, Oct 22 2019,18:00
The Gallery Thu, Oct 24 2019,14:00 Thu, Oct 24 2019,15:45
Yannice Faugere
CLS Space Oceanography Division
France
yfaugere@cls.fr