Types of dataset: multimission altimeter products.

DOI: note that these DOIs are the generic DOIs for those products. Specific DOIs have been set for each temporal extension as indicated in the table below.

• 10.24400/527896/a01-2022.005 for META3.2 DT allsat version   -  more metadata
• 10.24400/527896/a01-2022.006 for META3.2 DT twosat version   -  more metadata

Contents: multimission altimetry-derived eddy trajectories in version 3.2 DT (for Delayed-Time) computed with two series of upstream data: the "two satellites" constellation maps (distributed by C3S) and the "all satellites" constellation maps (distributed by CMEMS).

Use: study of ocean mesoscale eddies

Condition of access: These products are available free of charge for any purpose (scientific, operational, commercial, etc.) as stated in the licence agreement.

Data access service: on FTP and Thredds Data Server via your personal space MY AVISO+

Description: Anticyclonic and Cyclonic eddies detected from the multimission altimetry datasets, with their location, contours, amplitude, radius speed and associated metadata, for the whole altimetry period: 1993-ongoing

Geographic coverage: global

Format: NetCDF-4 Classic with CF standards.

Videos: The Mesoscale Eddy Trajectory Atlas version 3.2 is displayed on these videos. The blue circles are the cyclonic eddies and the yellow circles are the anticyclonic eddies. They are superimposed on the Absolute Dynamic Topography (ADT) distributed by Copernicus Marine Service (left) and with drifters from NOAA/AOML (right). Credits E.U. Copernicus Marine Service/CNES/CLS.

Tools:

• User Handbook: Mesoscale Eddy Trajectory Atlas Product Handbook META3.2 DT, SALP-MU-P-EA-23561
• Statistical analysis document (Figures following Chelton et al. 2011): one for the "allsat" constellation and one for the "twosat" constellation.
• Reading software: examples in Python programming language. Details on Aviso+ Users Newsletter #14, page 4: Tools for the Mesoscale Eddy Trajectory Atlas.
• Code delivery: the open source code is available at  https://github.com/AntSimi/py-eddy-tracker from version META3.0 onwards. When using the code, please cite "The code used to compute the Mesoscale Eddy Trajectories Atlas from version 3.0 onwards, was developed in collaboration between IMEDEA (E. Mason) and CLS, is freely available under GNU General Public License https://github.com/AntSimi/py-eddy-tracker ".
• Image of the month, June 2017: Eddies everywhere

Citation: If you use the data, please cite:: "The altimetric Mesoscale Eddy Trajectories Atlas (META3.2 DT) was produced by SSALTO/DUACS and distributed by AVISO+ (https://aviso.altimetry.fr ) with support from CNES, in collaboration with IMEDEA (DOI: 10.24400/527896/a01-2022.005.YYMMDD for the META3.2 DT allsat version  and 10.24400/527896/a01-2022.006.YYMMDD for the META3.2 DT twosat version)".

References:

• Pegliasco et al., OSTST 2022: A New Global Mesoscale Eddy Trajectories Atlas Derived from Altimetry : Presentation and Future Evolutions
• Pegliasco, C., Delepoulle, A., Mason, E., Morrow, R., Faugère, Y., Dibarboure, G., 2022. META3.1exp: a new global mesoscale eddy trajectory atlas derived from altimetry. Earth Syst. Sci. Data 14, 1087–1107. https://doi.org/10.5194/essd-14-1087-2022 
• Mason, E., A. Pascual, and J.C. McWilliams, 2014: A New Sea Surface Height–Based Code for Oceanic Mesoscale Eddy Tracking. J. Atmos. Oceanic Technol., 31, 1181–1188, https://doi.org/10.1175/JTECH-D-14-00019.1