Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7335
AuthorsDubois, C.* 
Somot, S.* 
Calmanti, S.* 
Carrillo, A.* 
Deque, M.* 
Dell'aquila, A.* 
Elizade, A.* 
Gualdi, S.* 
Jacob, D.* 
L’He ́ve ́der, B.* 
Li, L.* 
Sannino, G.* 
Scoccimarro, E.* 
Sevault, F.* 
TitleFuture projections of the surface heat and water budgets of the Mediterranean Sea in an ensemble of coupled atmosphere–ocean regional climate models
Issue Date2012
Series/Report no./39(2012)
DOI10.1007/s00382-011-1261-4
URIhttp://hdl.handle.net/2122/7335
KeywordsMediterranean Sea
scenarios
coupled regional climate models
circe
Subject Classification01. Atmosphere::01.01. Atmosphere::01.01.02. Climate 
AbstractWithin the CIRCE project ‘‘Climate change and Impact Research: the Mediterranean Environment’’, an ensemble of high resolution coupled atmosphere–ocean regional climate models (AORCMs) are used to simulate the Mediterranean climate for the period 1950–2050. For the first time, realistic net surface air-sea fluxes are obtained. The sea surface temperature (SST) variability is consistent with the atmospheric forcing above it and oce- anic constraints. The surface fluxes respond to external forcing under a warming climate and show an equivalent trend in all models. This study focuses on the present day and on the evolution of the heat and water budget over the Mediterranean Sea under the SRES-A1B scenario. On the contrary to previous studies, the net total heat budget is negative over the present period in all AORCMs and sat- isfies the heat closure budget controlled by a net positive heat gain at the strait of Gibraltar in the present climate. Under climate change scenario, some models predict a warming of the Mediterranean Sea from the ocean surface (positive net heat flux) in addition to the positive flux at the strait of Gibraltar for the 2021–2050 period. The shortwave and latent flux are increasing and the longwave and sen- sible fluxes are decreasing compared to the 1961–1990 period due to a reduction of the cloud cover and an increase in greenhouse gases (GHGs) and SSTs over the 2021–2050 period. The AORCMs provide a good estimates of the water budget with a drying of the region during the twenty- first century. For the ensemble mean, he decrease in pre- cipitation and runoff is about 10 and 15% respectively and the increase in evaporation is much weaker, about 2% compared to the 1961–1990 period which confirm results obtained in recent studies. Despite a clear consistency in the trends and results between the models, this study also underlines important differences in the model set-ups, methodology and choices of some physical parameters inducing some difference in the various air-sea fluxes. An evaluation of the uncertainty sources and possible improvement for future generation of AORCMs highlights the importance of the parameterisation of the ocean albedo, rivers and cloud cover.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
dubois_clim_dyn_2011.pdfmain article1.88 MBAdobe PDFView/Open
Show full item record

Page view(s)

88
Last Week
0
Last month
0
checked on Aug 23, 2017

Download(s)

23
checked on Aug 23, 2017

Google ScholarTM

Check

Altmetric