Dynamic Atmospheric Correction
The Dynamic Atmospheric Correction (DAC) allows taking into account the dynamic response of the ocean to atmospheric forcing for high frequencies Contents: Auxiliary products year by year directories (1992 - ongoing), day by day groups of files, 4 files a day (12:00, 6:00, 12:00, 18:00 GMT); grid is a regular grid (0.25°x0.25°) Use: coastal oceanography, operational oceanography, ocean circulation, tide studies Description: Dynamic Atmospheric Correction based on:
- Mog2D-G High Resolution barotropic model developed by Legos/CNRS for high frequency (i.e less than 20 days)
- an IB correction developed by CLS, assuming a static response of the ocean to atmospheric forcing, and neglecting wind effects for low frequency (i.e more than 20 days) Geographic coverage: global
Main improvements of the new version V4.0 (August 2023):
- Using a new bathymetry database, coming from FES2014 global tidal solution.
- Update the barotropic model version, to fit with TUGO model (Pineau-Guillou 2018): include updates of the internal wave-drag dissipation parameters and some other internal parameters.
- The interpolation of the pressure and wind ECMWF variables has been improved.
- ECMWF library has been updated from grib_api 1.23 to ecCodes 2.20.
- The new DAC V4.0 solution reduces significantly the crossovers SSH variance on the global ocean compared to the operational DAC V3.5.1 solution: variance reduction can reach more than 5-10 cm² in coastal and shelf regions.
Data and resources
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Plus d'information sur AVISO+HTML Open
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Accès authentifié aux donnéesHTML Open
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THREDDSHTML Open
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Lucia Pineau-Guillou. Ocean-atmosphere interaction: improvement of wind stress for coastal physical modelling. Earth Sciences. Université de Bretagne…HTML Open
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Carrere L., M. Lievin, C. Kocha, Q. Dagneaux, F. Lyard, D. Allain, Y. Faugère, G. Dibarboure, N. Picot (2020), Using ERA5 to improve the Dynamic Atmospheric…PDF Open
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Carrere, Y. Faugère, F. Lyard, D. Allain, G. Dibarboure, N. Picot (2019), Last TUGO model simulations and perspectives of evolution of the Dynamic Atmospheric…PDF Open
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Carrère, L., and Lyard, F. (2003), Modeling the barotropic response of the global ocean to atmospheric wind and pressure forcing - comparisons with…HTML Open
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HTML Open
Additional information
| Temporal extent | 1992-01-01 – ongoing |
|---|---|
| Date (creation) | 1992-01-01 |
| Status | onGoing |
| Update frequency | asNeeded |
| Metadata language | fr |
| License | Licence |
| Source metadata | ISO 19115 XML |
| Last updated | 2026-11-04 |
| Created | 2026-11-04 |
| API | package_show |