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.
Tools:
- User Handbook: Ssalto/Duacs User Handbook : Finite Size Lyapunov Exponents and Orientations of associated eigenvectors Products
- Image of the month September 2018: A buoy trapped in filaments
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 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".
Since version DT2024, the code used is described here: https://py-eddy-tracker.readthedocs.io/en/stable/python_module/07_cube_manipulation/pet_fsle_med.html (Copyright 2019, A. Delepoulle & E. Mason)
Description: this product is calulated with maps of up-to-date datasets using all missions available at a given time (up to 9 satellites) which is the best in quality but not homogeneous over the time period.
Copyright : 1994 - ongoing CLS - Cnes - LOcean - CTOH
DT FSLE
Satellite | 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 DT2024 | 140 MB per file |
FSLE on a routine production with 20-day latency
Satellite | Authenticated access service | Frequency | Data period | File weight |
|---|---|---|---|---|
| Merged | Please refer to MY AVISO+ | daily | From 2024/11/01-ongoing (D-20 days) In version DT2024 from 2024/11/26 | 140 MB per file |
Data
- Products guide.
Products .- Sea surface height products .
- Value-added products .
- VENµS Level-2 Marine reflectances.
- ODATIS (MR) Level 3 - Basic.
- Simulated Level-2 ODYSEA dataset.
- Antarctic Circumpolar Current (ACC) - fronts product.
- Segmented images of meteocean processes.
- FSLE (Finite Size Lyapunov Exponents).
- Global mesoscale eddy trajectory product .
- Mediterranean 3D Eddies Atlas product.
- Sargassum detection products .
- Wind/wave products .
- Auxiliary products .
- Ice products .
- Ocean indicators products .
- Ocean data challenges .
- Tide Gauges products.
- Data access .
- Product information .
- CALVAL .
