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The Mediterranean Forecasting System: recent developments

The Mediterranean Forecasting System: recent developments. Marina Tonani (1), P. Oddo (1), G. Korres (4), E. Clementi (1), M. Drudi (1), M. D edominics (1) J. Pistoia (2), A. Guarnieri (1), V. Romaniello (1), G. Girardi (1), A. Grandi (1), A. Bonaduce (2),

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The Mediterranean Forecasting System: recent developments

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  1. The Mediterranean Forecasting System: recent developments Marina Tonani (1), P. Oddo (1), G. Korres (4), E. Clementi (1), M. Drudi (1), M. Dedominics (1) J. Pistoia (2), A. Guarnieri (1), V. Romaniello (1), G. Girardi (1), A. Grandi (1), A. Bonaduce (2), S. Salon (5), A. Teruzzi( 5), G. Cossarin (5), G. Bolzon (5), C. Solidoro (5), A. Crise (5) and N. Pinardi (3) IstitutoNazionale di Geofisica e Vulcanologia, Gruppo di OceanografiaOperativa, Bologna, Italy Centro EuroMediterraneo per iCambiamentiClimatici, Bologna, Italy University of Bologna, Department of Environmental Sciences, Ravenna, Italy Hellenic Centre for Marine Research, Athens, Greece IstitutoNazionale di Oceanografia e di Geofisicasperimentale, Trieste, Italy

  2. Topics • The Mediterranean Forecasting System general description: components and products • System: • High resolution atmospheric forcing • Atmospheric pressure • Increased horizontal resolution biogeochemical component • Products: • New reanalysis • Next evolution

  3. The Mediterranean Forecasting System (MFS) components

  4. The Mediterranean Forecasting System (MFS) : 1. High resolution atmospheric forcing New! December 2013 High resolution atmospheric forcing COSMO-ME (from USAM)

  5. 1. MFS - High resolution atmospheric forcing http: //medforecast.bo.ingv.it

  6. 1. MFS - High resolution atmospheric forcing Operational 10d Forecast Low Resolution NWP Forcing Operational 3d Forecast HighResolution (7km) NWP Forcing (COSMO-ME) MyOcean

  7. Marine Rapid Environmental Assessment – MREA 2014 Evaluation and inter-comparison of MFS systems 2-12 October 2014

  8. c 2. NEMO model : Introduction of the Atm pressure Barotropic Baroclinic c The atmospheric pressure is usually neglected, however it can play an important role in specific regions of the world characterized by geometrical constrains like the Med Sea. The free-surface elevation response to atmospheric pressure can be composed of External Gravity Waves (EGWs). EGWs require a very small time step time scale short compared to other processes Two methods are implemented in NEMO to allow a longer time step solving the primitive equation in presence of EGWs: the so called filtered and the time-splittingmethod. Med-currents R&D: 8

  9. 2. MFS-V4 (with atm. Pressure) evaluation: Sea Level in Venice Model: atm. pressure & time splitting parameterization V3  V4 Data Assim.: SLA along track without DAC correction (J2, Cr2, S/A) The system with atm. pressure and time splitting (V4) is better than the previous version (V3)

  10. Med-MFC Med currents V4 evaluation: Mediterranean basin J2 (J1) J2+Cr2+S/Al

  11. 3. MFS-BGC (increased res. 1/16): Chl validation EANs of surface chlorophyll Increased horizontal resolution relevant in the reproduction of small scale horizontal structures in specific areas (e.g. coastal area– lateral transport processes) SAT 1/8 1/16

  12. 3. MFS-BGC (increased res. 1/16): Net Primary Production Basin-scale net primary production is affected by increased resolution in mesoscale-active areas such as Alboran Sea __ 1/8 __ 1/16 MED ALB Improvement in reproducing sub-regional annual means of vertically integrated net primary production in western Mediterranean areas, other areas remain unaffected. Not enough observation to evaluate the high spatial frequency.

  13. MFS-products

  14. 4. MFS-BGC reanalysis (199-2010) with Chl assimilation No DA DA The DA significantly improves the description of the variability of surface chlorophyll

  15. Next steps: • MED-PHYS: • Improvement of model diffusion and advection parameterization (horiz. diff. and visc., tracer advection scheme and momentum equation) • LOBC: connection with GLOBAL Mercator 1/12° • Assimilation of glider T/S profiles • GODAE CLASS-4 • High resolution (hourly) products • MED- BIO: • DA of surface Chl in coastal areas and DA of other variables • non –climatological light extinction coefficient MODEL DOMAIN

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