Products Mesoscale Eddy Trajectory Atlas Product
Several versions of the Mesoscale Eddy Trajectory Atlas are available to users. The main characteristics of latest versions are described below, the details are on each product page:
| META4.0 DT | META 3.2exp NRT | |
|---|---|---|
| PRODUCT CHARACTERISTICS | ||
| PROCESSING | ||
| INPUT DATA | ||
| INPUT DATA | ||
| Constellation | All satellites | All satellites |
| DOI | 10.24400/527896/a01-2026.001 | - |
| Timeliness | Delayed-time | Near-Real-Time |
| Period | 1993/01/01 - 2023/09/08 | 01/01/2018 - ongoing (with 15 days delay) |
| Geographical coverage | Global | |
| Delivery format | 2 files (1 for cyclonic and 1 for anticyclonic) | |
| Update | Every year | Every day |
| Product Page with handbook | META4.0 DT | META3.2exp NRT |
| Constellation | All satellites | All satellites |
| Origin of upstream products | CMEMS Delayed-Time version 2021 | CMEMS Near-Real-Time |
| Input variable | ADT (Absolute Dynamic Topography) | |
| Preprocessing | Raw ADT (without filtering) | Lanczos filter with a Bessel window 2D (cutoff 700 km, order 1) |
| Identification | Py Eddy Tracker algorithm (collaboration with E. Mason) Provide Eddy position, Speed and Effective Radius, Amplitude, associated contours, speed profile | |
| Number of extrema in one eddy | Only one | |
| Shape error | 70% | |
| Amplitude threshold | 0.4 cm | |
| Tracking | Py Eddy Tracker: association of eddied within a network by contours' overlap, detection of merging and splitting events | Py Eddy Tracker : association of eddies within a trajectory by contours’ overlap, virtual observations, subsetting |
| Method | Overlap between eddies | |
| Land control | - | |
| Virtual observations | - | Max of 4 consecutive virtual eddies |
| Minimum Lifetime | - | 10 days |
List of past versions which are not updated anymore
| DOI | Period covered | Product page with handbook | Last update | |
|---|---|---|---|---|
| META 3.2 DT | 10.24400/527896/a01-2022.005 for allsat version 10.24400/527896/a01-2022.006 for twosat version | 1993/01/01/ - 2022/02/09 | product page | |
| META 3.1exp DT | 10.24400/527896/a01-2021.001 for allsat version 10.24400/527896/a01-2021.002 for twosat version | 1993/01/01/ - 2020/03/07 | product page | |
| META 3.0exp NRT | - | 2018/01/01 - | product page | |
| META 2.0 DT (not recommended) | - | 1993/01/01 - 2020/03/07 | product page |
