wave model of evolution of sea state

Wave forecasting models allow the representation of sea states based on a spectral resolution at the global scale or at the scale of ocean basins. This code calculates the evolution of the sea state by decomposing it into a wave spectrum that propagates in different directions and with different periods. During the propagation, the wave energy is increased or decreased by the effects of wind, breaking waves and energy exchanges between the different components.

The wave forecasts available on data.shom.fr are calculated with 2 different types of models: MFWAM for the offshore domain (resolution from 0.5° to 0.1°) and Wavewatch III ® (WW3) for the coastal domain (resolution from 2min to 200m).

MFWAM is a sea state forecasting model (wind wave and swell) derived from the third generation WAM code (WAMDI Group, 1988).

Wavewatch III ® (WW3) is developed in a collaboration between the United States Weather Service (NOAA/NCEP), Shom, the University of Darmstadt in Germany, and other partners. The forecasts published on data.shom.fr are issued from the parameterization carried out and optimized by the Shom and Météo-France within the framework of the Homonim project (national coastal flood/wave/storm warning system).

Citation proposal
(2017) . wave model of evolution of sea state. https://services.data.shom.fr:/geonetwork/cache/api/records/OCEANO_MODELE_VAGUES.xml

Simple

Date ( Publication ): 2017-02-21

Edition

Identifier: http://www.shom.fr/OCEANO/MODELE_VAGUES

Credit: Shom et Météo-France

Point of contact

Shom

13 rue du Chatellier

BREST

29200

France

Maintenance and update frequency: Daily

Update scope: Dataset

Keywords ( Theme )

model
oceanography
wave
Produit
product

GEMET - INSPIRE themes, version 1.0 ( Theme )

Oceanographic geographical features

INSPIRE Spatial scope

Nationales

High-value dataset categories

Observation de la terre et environnement

Use limitation: forecasts released under the Open License version 2.0 of April 2017, defined by the Etalab mission.

Use limitation: free use allowed on condition that the source is acknowledged and the last udate date is given.

Use limitation: MFWAM/WW3 wave forecasts (Météo-France, Shom) are released under the Open License version 2.0 of April 2017, defined by the Etalab mission.

Access constraints: License

Use constraints: Other restrictions

Other constraints: Open License version 2.0 of April 2017, defined by the Etalab mission.

Access constraints: Other restrictions

Other constraints: Pas de restriction d'accès public. No public access restriction.

Classification: Unclassified

Spatial representation type: Grid

Metadata language: French

Character set: UTF8

Topic category

Oceans

Supplemental Information

The size of the model domains considered often requires the use of relatively loose meshes (generally from 1° to 0.25°) in order to keep acceptable the computation time. A succession of nested models allows to reach finer resolutions, from the global scale to the regional scale (a few kilometers) and the local scale (a few hundred meters). Another technique to reach high resolutions at the coast while avoiding model nesting is the use of unstructured grids.

The models are regularly compared with observations made by the in-situ wave buoy networks (Cerema).

Attributes: sea surface wave peak direction, wave peak frequency, significant height of wind and swell waves,significant height of wind and swell waves, wave from direction partition 0, wave from direction partition 1, significant wave height partition 0, significant wave height partition 1, dominant wave period partition 0, dominant wave period partition 1

Distribution format

NetCDF
(
4
)

Point of contact

Shom

OnLine resource: Portail d'information géographique du Shom

OnLine resource: Access point / WMS
Access point / WMS

Hierarchy level: Series

Conformance result

Date ( Publication ): 2010-11-23

Explanation: Information sur la conformité au règlement d'interopérabilité des séries et des services de données géographiques.

Pass: true

Conformance result

Date ( Publication ): 2013-12-10

Explanation: Information sur la conformité de la ressource à une spécification (INSPIRE).

Pass: true

Statement

The wave model outputs available on data.shom.fr provide for each run wave forecasts from day D to day D+2/D+3/D+4, depending on the configuration:

- GLOB05: MFWAM model, global 0.5° resolution grid, forced by the ECMWF IFS-ECMWF weather model

- EURAT01: MFWAM model, European 0.1° resolution grid, forced by the Météo-France ARPEGE weather model

- ANGUY01: MFWAM model, 0.1° resolution grid for Antilles-Guyane area (from the GLOB0125 grid), forced by the ECMWF IFS-CEP weather model

- MASCA01: MFWAM model, 0.1° resolution grid for Indian Ocean area, forced by the Météo-France AROME Outre-Mer weather model supplemented by the IFS-ECMWF model

- NORGAS-UG, MENOR-UG, ANGUY-CG and INDIEN-UG: irregular-mesh grid from the WW3 model, with a resolution ranging from 10km offshore to 200m at the coast. On data.shom.fr, these irregular grids are reprojected onto regular grids with different resolutions: 2min, 500m and 200m. The more closer to the coast the area is, the more refined the resolution (for example: NORGAS-2MIN -> MANCHE-NORD-500M -> NORMANDIE-200M). For metropolitan France, WW3 is forced by the Météo-France ARPEGE weather model; in the Antilles-Guyane and the Réunion-Mayotte areas WW3 is forced by the Météo-France AROME Outre-Mer model.

The "time" variable refers to the data in terms of its validity date: it is expressed in Julian days elapsed since 1st January 1990 at 00:00:00.