Atmosphere-Ocean regional coupling: the Mediterranean

The SAMM (Sea Atmosphere Mediterranean Model) has been developed to
study the climate evolution of the Mediterranean and European regions
for the 21st Century. SAMM is a new concept of AORCM (Atmosphere–Ocean
Regional Climate Model), where a global atmosphere model is locally
coupled with a regional ocean circulation model. It consists of the
global spectral AGCM ARPEGE-Climate model, whose variable resolution is
maximum in the Mediterranean region (50 km), which has been coupled to
the Mediterranean Sea limited area OGCM OPAMED (10 km). Two twin
140-year numerical experiments starting in 1960 were run with the AORCM:
a control run following present-climate conditions and a scenario in
which SRES-A2 forcings were applied beyond year 2000.

Evaluation of the regional atmosphere and ocean parts of the model are
presented as well as results from the obtained climate change signal for
Europe and the Mediterranean Sea. Coupled and non-coupled configurations
are compared in order to estimate the added value of the regional
coupling. Future developments of coupled regional climate models at
Meteo-France/CNRM will be introduced in the framework of the CIRCE and
HYMEX projects.




15:15 h


Bundesstr. 53, room 022/023
Seminar Room 022/023, Ground Floor, Bundesstrasse 53, 20146 Hamburg, Hamburg


Samuel Somot, MetFrance


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