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
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;
Features of the transport model
OPATM-BFMOff-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 simulationNutrients nudging in the Atlantic boxNo external inputs
Diatoms
Flagellates
Picophytoplankton
L PhotoadaptationL
P(1)
Large Phyto.LP(4)
LP(2)
LP(3)
Oxygen
Carbon dioxide
O Dissolved Gases
O(2)
O(3)
Phosphate
Nitrate
Ammonium
Silicate
N Inorganic NutrientsN(1)
N(3)
N(5)
Red. EquivalentsN(6)
N(4)
ZMicrozooplankton
(s.s.)
Heterotrophic
nanoflagellates
MicrozooplanktonZ
i(5)
Zi(6)
Carnivorous
Omnivorous
Z Mesozooplankton
Zi(3)
Zi(4)
B
Bacteria (aerobic
and anaerobic)
Bacterioplankton
Bi
Dissolved
Particulate (detritus)
R Organic Matter
Ri(1)
Ri(6)
Diatoms
Flagellates
Picophytoplankton
P PhytoplanktonP
i(1)
Large Phyto.Pi(4)
Pi(2)
Pi(3)
Vectors (Functional Group or Ordinary State Variables)
Organic matter flow (C,N,P,Si)
Inorganic nutrient flow (N,P,Si)
Gas exchange
PelagicBenthic flow
Scalars (Ordinary State Variables)
Z
The BIOGEOCHEMICAL FLUX MODELThe BIOGEOCHEMICAL FLUX MODEL
Biogeochemical Model (M. Vichi )-http://www.bfm.cmcc.it/
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, …)
TEST-0 SIMULATION FORCING AND I.C. USED IN THE DYNAMICAL
MODEL SIMULATION
MED16--ECMWF1/16° degree resolution; 43 vertical levelsHigher in Gibraltar Strait through curvilinear grid
Initial conditions for dynamical model: T,S seasonal, climatology MODB-4
Atmospheric Forcing : ECMWF Analyses (0.5o)Daily fluxes 1/03/1998-2005 = 8 yearsMonthly runoff UNESCO
State variables initialization
3D Field are needed T=0 “single frame” climatology is used
Model needs …
Medar Medatlas DATASET vertical profiles
Initialization of nutrients fields
phosphates, nitrates, silicates, oxygen
Boundary conditions
2D Field are needed T=0 … T=Tfin “Seasonal fileds Used”
Model needs …
Vertical profiles applied in the Atlantic Area
Atmospherical, riverine input
Nutrients,but alsoDOMcan be relevant fortotal budget
Diffusive attenuation coefficient from satellite SeaWiFS data http://seadas.gsfc.nasa.gov/PRODUCTS/SW_k490.html
With coastal area Without coastal area
1997-2004 Climatological Seasons
Data provided by Gianluca Volpe and Lia Santoleri
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)
Comparison of OPATM-BFM Model Surface Chla and Satellite
Data from Oubhelkeir et al, 2005
Estimate of the Primary Production 1999-2000-2001
Deliverable 4.5.1.1First 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: [email protected]