MEDITERRANEAN SEA REANALYSIS
Area: Mediterranean sea
Data available: YES
Institution: INGV (Italy), Copernicus Marine Environment Monitoring Service (CMEMS)
Model: NEMO-OPA version 3.2 and 3.4
Resolution: The model is implemented in the Mediterranean Sea at 1/16° x 1/16° horizontal resolution and 72 unevenly spaced vertical levels (Oddo et al, 2009). It is nested in the Atlantic within the monthly mean climatological fields computed from ten years of daily output of the 1/4° x 1/4° degrees global model (Drevillon et al. 2008).
Data assimilated: The SLA data consist of sea level anomalies referred to a 7-year average (1993-1999) and combine information from different missions (Topex/Poseidon, ERS-1 and ERS-2, Envisat, Jason1 and Jason2), intercalibrated with respect to a reference mission, which is currently Jason2. The temporal coverage depends on the duration of the mission starting from 1992. In situ data: MFSPP (Mediterranean ocean Forecasting System Pilot Project), MFSTEP (Mediterranean ocean Forecasting System Toward Environmental Prediction), SeaDataNet, MEDAR-MEDATLAS and CMEMS In situ TAC (Thematic Assembly Centre).
Assimilation method: OceanVar (Dobricic and Pinardi, 2008); The evolving part of temperature and salinity background error co-variances is represented by seasonal varying
Forcing and relaxation used: The model is forced by momentum, heat and water fluxes computed by bulk formulae adapted to the Mediterranean case, using AMIP data (Cherchi and Navarra, 2007). Heat flux is corrected proportionally to the difference between the model and observed SST (Pinardi et al.2003) with a relaxation coefficient equal to -60 Wm-2 K-1, corresponding to about 2.5 day time-scale over a depth of 3 m. The dataset consists of monthly SST (HadSST1) on regular grid of 1°x1° starting from 1870 (Rayner et al, 2003).Water balance is computed as evaporation minus precipitation and runoff. The evaporation is derived from the latent heat flux. Precipitation is taken from the Climate Prediction Centre Merged Analysis of Precipitation (CMAP) Data (Xie and Arkin, 1997). Runoff is taken from the Global Runoff Data Centre dataset (Fekete et al., 1999) for the Ebro, Nile and Rhone and the dataset from Raicich (Raicich, 1996) for the Adriatic rivers (Po, Vjosë, Seman and Bojana). The Dardanelles inflow is parameterized as a river, and the climatological net inflow rates are taken from Kourafalou and Barbopoulos (2003).
Download Data: http://marine.copernicus.eu/web/69-interactive-catalogue.php?option=com_csw&view=details&product_id=MEDSEA_REANALYSIS_PHY_006_009