Log in Français
Datasets / Ifremer

Mesoscale eddy trajectory atlas product - 3.2 - Delayed Time - Near-Real-Time

Other

Eddies detected in Delayed-Time (DT) for the period [1993 - 2022/02/09] or in Near-Real-Time (NRT) for the period [1993 - present]. Variables provided include day-by-day, and for one rotation type (Cyclonic/Anticyclonic) :

  • Center position (Longitude and latitude of the center of the best fit circle with the contour of maximum circum-average geostrophic speed);
  • Amplitude (|SSH(local_extremum) – SSH(outermost_contour)|);
  • Speed radius (Radius of the best fit circle with the contour of maximum circum-average geostrophic speed);
  • Speed average (Average geostrophic speed of the contour defining the speed radius);
  • Speed profile (Profile speed average values from effective contour inwards to smallest inner contour);
  • Effective contour (Largest contour of the detected eddy);
  • Speed contour (Contour of maximum circum-average geostrophic speed for the detected eddy). Note that DT versions differ by the input product used. The “two-satellite” maps are built using at most two altimetric missions, with the Topex-Poseidon and Jason satellites on the same long-term ground tracks, and a second satellite mission, mainly on the ERS-Envisat-Saral-Sentinel-3A ground tracks. As the sampling and the represented scales are stable throughout time, this dataset is considered to be homogeneous in time in terms of climate signals and mesoscale content. The data used are “two-satellite” daily Delayed Time DUACS2021 version, with the variable Gridded Global Absolute Dynamic Topographies (ADT), from the Copernicus Climate Change Service (C3S) http://climate.copernicus.eu/

Data and resources

Additional information

Temporal extent1993-01-01 – ongoing
Date (creation)2017-06-15
Date (publication)2022-03-22
Statusvalid
Update frequencyasNeeded
Metadata languagefr
LicenseLicence
Source metadataISO 19115 XML
Last updated2026-11-04
Created2026-11-04
APIpackage_show