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by Lebeaupin Brossier, C., Béranger, K., Deltel, C. and Drobinski, P.
Abstract:
The Mediterranean basin features a semi-enclosed sea, where interactions and feedbacks between the atmosphere and the Sea at various temporal and spatial scales play a predominant role in the regional climate. This study analyzes the Mediterranean Sea response in sensitivity experiments conducted by driving the NEMO-MED12 oceanic model in perpetual mode with various atmospheric forcings, all produced by the \WRF\ non-hydrostatic mesoscale atmospheric model, but differing by their resolutions: two horizontal resolutions (20 km at basin scale and 6.7 km in the North-Western [NWE] area) and two temporal resolutions (daily and three-hourly). The atmospheric fields available from August 1998 to July 1999 are in good agreement with estimates derived from satellite data. The heat budget of the Mediterranean Sea represents an heat loss of 5 W/m2 and the annual freshwater budget is −1.04 m, in agreement with climatologies. An increase in the spatial resolution in the \NWE\ area modifies the modeled circulation from −10% to +15% for the SST, from −30% to +50% for the SSS, from −10% to +30% for the \MLD\ and from −10% to +30% for the \EKE\ in surface. The increase in the wind speed with a better chanelling by the land orography enhances in particular the oceanic convection process in the \NWE\ area. On the other hand, the increase in the temporal resolution reduces the convection process, because of the diurnal restratification of the oceanic upper layer. It also reduces the surface parameters high-frequency variability, whereas it increases the \EKE\ values in surface, due to the rapid response to the wind.
Reference:
Lebeaupin Brossier, C., Béranger, K., Deltel, C. and Drobinski, P., 2011: The Mediterranean response to different space-time resolution atmospheric forcings using perpetual mode sensitivity simulationsOcean Modelling, 36, 1-25.
Bibtex Entry:
@Article{LebeaupinBrossier2011,
  Title                    = {The Mediterranean response to different space-time resolution atmospheric forcings using perpetual mode sensitivity simulations},
  Author                   = {Lebeaupin Brossier, C. and Béranger, K. and Deltel, C. and Drobinski, P.},
  Journal                  = {Ocean Modelling},
  Year                     = {2011},
  Number                   = {1-2},
  Pages                    = {1-25},
  Volume                   = {36},

  Abstract                 = {The Mediterranean basin features a semi-enclosed sea, where interactions and feedbacks between the atmosphere and the Sea at various temporal and spatial scales play a predominant role in the regional climate. This study analyzes the Mediterranean Sea response in sensitivity experiments conducted by driving the NEMO-MED12 oceanic model in perpetual mode with various atmospheric forcings, all produced by the \{WRF\} non-hydrostatic mesoscale atmospheric model, but differing by their resolutions: two horizontal resolutions (20 km at basin scale and 6.7 km in the North-Western [NWE] area) and two temporal resolutions (daily and three-hourly). The atmospheric fields available from August 1998 to July 1999 are in good agreement with estimates derived from satellite data. The heat budget of the Mediterranean Sea represents an heat loss of 5 W/m2 and the annual freshwater budget is −1.04 m, in agreement with climatologies. An increase in the spatial resolution in the \{NWE\} area modifies the modeled circulation from −10% to +15% for the SST, from −30% to +50% for the SSS, from −10% to +30% for the \{MLD\} and from −10% to +30% for the \{EKE\} in surface. The increase in the wind speed with a better chanelling by the land orography enhances in particular the oceanic convection process in the \{NWE\} area. On the other hand, the increase in the temporal resolution reduces the convection process, because of the diurnal restratification of the oceanic upper layer. It also reduces the surface parameters high-frequency variability, whereas it increases the \{EKE\} values in surface, due to the rapid response to the wind.},
  Copublication            = {4: 4 Fr},
  Doi                      = {10.1016/j.ocemod.2010.10.008},
  ISSN                     = {1463-5003},
  Keywords                 = {Atmospheric forcing},
  Owner                    = {hymexw},
  Timestamp                = {2016.01.07},
  Url                      = {http://www.sciencedirect.com/science/article/pii/S1463500310001642}
}