27 march 2009 météo-france and hydrology jean-marie carrière director of forecasting

27 March 2009

Météo-France and hydrology

Jean-Marie CarrièreDirector of Forecasting

27 March 2009

Météo-France and hydrology Although hydrology is not in the basic missions of Météo-

France…

– The missions of Météo-France include observing, qualifying and forecasting precipitations and other atmospheric parameters, as well as the state of the snow mantle and ocean surface (waves). These factors, especially precipitations, are of utmost importance for hydrology.

– Modelling the interactions between soil and atmosphere, which is made routinely in the frame of Numerical Weather Prediction and climatic simulation, provides a frame which allows tackling some aspects of surface hydrology.

– SCHAPI (the French national flood forecast centre) and the central weather

forecast services of Météo-France in Toulouse are co-located

27 March 2009

Météo-France and hydrology A framework agreement between Météo-France and the ministry

of Ecology and Sustainable Development

- Methodological support to flood prevention

- Definition and cost sharing (investment) of surface precipitations observation network (in situ and remote sensing systems)

- Operational support to flood forecasting centres (SCHAPI & SPC)

- Météo-France is itself a flood forecasting centre for the « East Mediterranean » area (but it does not manage the water level measurement network)

- Support to hydrological follow-up and drought management

- Collaborative studies on the detection and anticipation of the impact of climate change on the water cycle

27 March 2009


The operational non-hydrostatic NWP model AROME of Météo-France

Resolution ~ 2,5 km

Thunderstorms over Paris

27 March 2009


The French hydrometeorological radar network operated by Météo-France

Doppler winds used in the AROME model, reflectivities soon

27 March 2009


Météo-France’s soil surface model

Used for drought follow-up and operational flood forecasting (flood vigilance)

Soil water index

Water content of the snow mantle (kg . m-2)

Result of a large co-operation in the French community (SISYPHE, Ecole des Mines, CNRS,…)

27 March 2009


Météo-France’s real time climatological qualification system for heavy precipitations

Regionalization of return period for extreme precipitationReturn period 10 years for 24 hour-cumulated precipitation

- Developed in collaboration with Cemagref- An aid to decision-makers- Experimented by SCHAPI and SPC- Red : return period > 50 years

27 March 2009


Contribution to the studies about the impacts of climate change on the hydrological cycle

27 March 2009


Ensemble river discharge forecasting system

Experimented by SCHAPI and SPC

Developed in cooperation between Météo-France, Ecole des Mines, …

27 March 2009


Météo-France’s storm surge operational model

Should be experimented by SCHAPI and SPC for estuaries and water evacuation at sea

27 March 2009


The Gironde hydrodynamic 2D finite-element model

A collaborative project between Météo-France, SCHAPI, SPC and the National Hydraulic Research Lab of EDF

Operated routinely by Météo-France on its super-computer (Nec SX-9)

27 March 2009


The French meteorological vigilance system combines heavy precipitations and flood risk as an integrated « precipitation and/or flood » risk pictogram

27 March 2009


The scheme of real-time operational expertise exchanges and crisis management between Météo-France, SCHAPI and SPC

Regional level

National level

27 march 2009 météo-france and hydrology jean-marie carrière director of forecasting

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