1. Mediterranean Sea Basin Scale model P.Lazzari, S. Salon, A. Teruzzi, K.Beranger, A. Crise Sesame WP3 meeting Villefranche sur Mer, 25-26 Februay 2008 OGS, Trieste

2. 1) Perform a hindcast climatological simulation (1970-2000) 2) Perform analyses of scenarios with A1B IPCC scenarios (2070-2100) Forcing fields (circulation) from INGV simulations: Coupling of a biogeochemical-hydrodynamical model of the system describing the cycles of azote, phosphorus, and carbon in the general circulation of the Mediterranean Sea; Analyses of datasets coming from in situ and remote measurements and preparation of initial and boundary conditions; Sensitivity analyses of the impacts in changing forcing on the trophic web; Sinthetic Analyses of the results of numerical simulations and estimation of carbon fluxes in pelagic systems;

3. Features of the transport model OPATM-BFM Off-line physical-biochemical coupling Transport model works using previously stored forcing data: temperature, salinity, 3D velocity, vertical eddy diffusion coefficients In principle differents programs can be adopted to originate the forcing fields after an interpolation on the transport model grid Fully prognostic, data-free simulation Nutrients nudging in the Atlantic box No external inputs

4. Biogeochemical Model (M. Vichi )-http://www.bfm.cmcc.it/

5. Element relevant for model simulations Physical forcings State variables initialization (nutrients) Boundary conditions (Straits) To produce the simulations To analize the result Biogeochemical Data (Chl-a, Carbon, …)

6. TEST-0 SIMULATION FORCING AND I.C. USED IN THE DYNAMICAL MODEL SIMULATION MED16--ECMWF 1/16° degree resolution; 43 vertical levels Higher in Gibraltar Strait through curvilinear grid Initial conditions for dynamical model: T,S seasonal, climatology MODB-4 Atmospheric Forcing : ECMWF Analyses (0.5 o ) Daily fluxes 1/03/1998-2005 = 8 years Monthly runoff UNESCO

7. State variables initialization 3D Field are needed T=0 “single frame” climatology is used Model needs …

8. Medar Medatlas DATASET vertical profiles Initialization of nutrients fields phosphates, nitrates, silicates, oxygen

9. Boundary conditions 2D Field are needed T=0 … T=Tfin “Seasonal fileds Used” Model needs …

10. Vertical profiles applied in the Atlantic Area

11. Atmospherical, riverine input Nutrients, but also DOM can be relevant for total budget

12. Diffusive attenuation coefficient from satellite SeaWiFS data http://seadas.gsfc.nasa.gov/PRODUCTS/SW_k490.html With coastal areaWithout coastal area 1997-2004 Climatological Seasons Data provided by Gianluca Volpe and Lia Santoleri

13. Model qualification The qualification of the model is on-going. The procedures described in the MERSEA technical report MERSEA-WP05-MERCA-STR-0007-1A0 List of internal metrics, specifications for implementation are applied: here are presented Class 1 consistency tests Consistency test: comparison between patterns of chlorophyll content obtained by satellite data and model outputs Satellite data reprocessed by GOS-ISAC-CNR (Gianluca Volpe)

17. Comparison of OPATM-BFM Model Surface Chla and Satellite

18. Data from Oubhelkeir et al, 2005

19. Estimate of the Primary Production 1999-2000-2001

20. Deliverable 4.5.1.1 First hindcasts from Mediterranean sea basin scale model available from ftp that can be used to force regional Mediterranean sea models at their open boundaries RUN1: First multi-annual simulation (1998-2005) - Climatological year. Ancillary files are also provided: - clim.ctl file to handle the monthly files (GrADS) -BFM_var_list.m file containing all biogeochemical variables label (Matlab); - read_mesh.m file to load meshmask data (Matlab); - read_avedat.m file to load biogeochemical data(Matlab). For further details and to download the data please contact: ogsmod.sesame@inogs.it