Types of dataset: multimission altimeter products.

Contents: multimission altimetry-derived eddy trajectories in version 3.0exp NRT (for Near-Real-Time).

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. Users should keep in mind that these products are experimental products. Notably, they are not produced on an operational basis. 

Data access service: FTP

Description: eddies detected from the multimission altimetry datasets, with location each day giving the type (cyclonic/anticyclonic), speed, radius and associated metadata, for the altimetry period: 01/01/2018 - ongoing with15 days delay

Geographic coverage: global

Format: NetCDF-4 Classic with CF standards.

An example of eddy merging with NRT3.0exp version is given below (you can download the video here):

Tools:

• User Handbook: Mesoscale Eddy Trajectory Atlas Product Handbook, SALP-MU-P-EA-23488
• 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 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 (META3.0exp NRT) is produced by SSALTO/DUACS and distributed by AVISO+(https://www.aviso.altimetry.fr/ ) with support from CNES, in collaboration with IMEDEA.

References:

• 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
• Poster presentation, OSTST 2018, A Delepoulle et al., A new 25 year mesoscale eddy trajectory atlas on AVISO
• Poster presentation, OSTST 2017, A.Delepoulle et al., 24 year mesoscale eddy trajectory atlas on AVISO