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FSLE - Maps of Finite Size Lyapunov Exponents and Orientations of the associated eigenvectors

Types of dataset: multimission altimeter products derived from Ssalto/Duacs products.

DOI: 10.24400/527896/a01-2022.002  -  more metadata

Contents: multimission altimetry-derived gridded backward-in-time Finite Size Lyapunov Exponents and Orientations of associated eigenvectors. These products have been computed in collaboration between CLS, LOcean, CTOH and Cnes.

Use: study of ocean variability in different domains of the biology (mesoscale and sub-mesoscale circulation, seasonal variation...), assimilation, ....

Condition of access : These products are delivered for any purposes as stated in the licence agreement

Description: gridded product, provided in delayed time and routine production of 20-day latency. As a snapshot, each map represents the sea state for a given day. One spatial resolution is available: 1/25°x1/25° on a cartesian grid. 

Detailed description: a complete description is available as well as some examples of applications.

Geographic coverage: global

Format: NetCDF-4 Classic with CF standards.


Code delivery: The method was initiated by F. d'Ovidio, LOcean. The products are delivered via the Aviso+ website. The source code is also distributed open source if you intend to apply your own parameters and/or in regional area (see full description of the method  and code delivery). To use the code, please cite : "The code used to compute Finite Size Lyapunov Exponents, was developed in collaboration between LOCEAN (F. d'Ovidio) and CLS, is available under GNU General Public License".

Description: this product is calulated with maps of up-to-date datasets using all missions available at a given time (up to 5 satellites) which is the best in quality but not homogeneous over the time period. 

Copyright : 1994 - ongoing CLS - Cnes - LOcean - CTOH


Authenticated access service Frequency Data period File weight
Merged Please refer to MY AVISO+  3-4 times per year From 1994/01/04 -ongoing (up to 9 months delay) in version DT2021 140 MB per file

FSLE on a routine production with 20-day latency

Authenticated access service Frequency Data period File weight
Merged  Please refer to MY AVISO+  daily

From  2018/05/28-ongoing (D-20 days)

In version DT2021 from 2021/12/14

140 MB per file
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