This is a description of EFAS v3.0, For an overview of other EFAS releases, please see: EFAS versioning system
Summary
EFAS version 3.0.0 contains updates on the EFAS module for calculating evapotranspiration (LISVAP) in the operational set up.
Computation of evapotranspiration is now performed using the Penman–Monteith formula in LISVAP. All EFAS components will now be using the updated LISVAP outputs including the seasonal forecasts and the flash flood indicator ERIC.
The changes are expected to result in slightly wetter conditions, i.e. higher soil moisture and river discharge, and to affect slightly EFAS and ERIC reporting points. It is expected that in general the performance of EFAS will not change much or will slightly improve.
To analyze possible changes in skill in the flash flood indicator ERIC, the ERIC simulations were recalculated over a 3 month period using the new LISVAP routine. It was found that at present there is no need to change the current flash flood notification thresholds (see document below for full results).
References
ERIC verification results for a 3 month period when using forced with soil moisture from the new LISVAP: ERIC_newLISVAP_results.docx
Technical details
| Release date | 2019-05-13 12 UTC |
|---|---|
| In test suite | 2019-04-17 12 UTC |
EFAS internal release | 017 |
| Archiving of data | ecfs, MARS, CDS |
| Reference climatology (for thresholds/ anomalies) | |
| EFAS historicalClimatology | 1991-01-01 - 2020-03-04 |
| Horizontal projection | ETRS89 Lambert Azimuthal Equal Area Coordinate Reference System (ETRS-LAEA) |
| Horizontal resolution | 5 x 5 km |