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Datasets / Ifremer

Mesoscale eddy trajectory atlas product - Delayed Time - Allsat

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Eddies detected in Delayed-Time (DT) for the period [1993/01/01 - 2023/09/08]. 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).

The ”allsatellite” maps (Allsat) are built with all the available satellites at a given time, improving the small scales representation in the maps due to the diversity of the tracks’ location and the different repetition periods of the altimetric missions. The data used are “all-satellite” daily Delayed Time DUACS2021 version https://doi.org/10.48670/moi-00148, with the variable "Gridded Global Absolute Dynamic Topographies (ADT)" from Copernicus Marine Service (CMEMS) http://marine.copernicus.eu/.

Data and resources

Additional information

Temporal extent1993-01-01 – 2023-09-08
Date (creation)2017-06-15
Date (publication)2022-03-22
Date (lastUpdate)2026-05-17
Statuscompleted
Update frequencyasNeeded
Metadata languagefr
LicenseLicence
Source metadataISO 19115 XML
Last updated2026-11-04
Created2026-11-04
APIpackage_show