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Antonio Ricchi (Univ. “ Parthenope ”, Naples, Italy)

A COUPLED ATMOSPHERE-OCEAN MODELING SYSTEM FOR INVESTIGATING THE EXCEPTIONAL WINTER 2012 CONDITIONS IN THE NORTHERN ADRIATIC SEA. b. Antonio Ricchi (Univ. “ Parthenope ”, Naples, Italy)

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Antonio Ricchi (Univ. “ Parthenope ”, Naples, Italy)

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  1. A COUPLED ATMOSPHERE-OCEAN MODELING SYSTEM FOR INVESTIGATING THE EXCEPTIONAL WINTER 2012 CONDITIONS IN THE NORTHERN ADRIATIC SEA b Antonio Ricchi (Univ. “Parthenope”, Naples, Italy) Sandro Carniel, Davide Bonaldo, Alvise Benetazzo, Andrea Bergamasco, Mauro Sclavo, F.M. Falcieri (CNR-ISMAR, Venice, Italy) M.M Miglietta (CNR-ISAC, Lecce, Italy)

  2. Bologna Trieste Genova Trieste Romagna coast Ancona Rimini Inland Venice Florence Venice Cold wave in N Italy Bologna

  3. North Adriatic Sea

  4. WRF setup • 7 km res. • 60 vertical levels • DT 36 sec. • 1° level at 6 mt • Dataset USGS 1’x1’ • Landuse : USGS 1’x1’ • CU : Kain • MP : Lin et Al • PBL : MYNN2.5 • Surface S.: MJY • Soil : Noah • RW : RRTMG • LW : RRTMG • INIT & BC : GFS-FNL 1°x1° • SST : RTG_SST COAWST configuration SWAN setup: DT 1200 sec 1 km res WRF • ROMS setup • 30 levels • Dt 5 sec • 1 km res • BC 3 hrs(MFSTEP model) • Tide ROMS/SWAN

  5. Case description WRF-StandAlone runs: A_GFS: SST to GFS-SKIN A_STA: SST to RTG_SST (1sttimestep no evolution) A_OML: SST to RTG_SST and OML for evolution A_DIN: Dynamic update of SST, with RTG_SST every 6 hours Coupled runs: AO: Atmosphere <–> Ocean Coupling AOW: Atmosphere <–> Ocean <–> Wave Coupling

  6. Parameterization for A-O and A-O-W #define ROMS_MODEL #undef SWAN_MODEL #define WRF_MODEL #ifdef WRF_MODEL # define ATM2OCN_FLUXES # define ANA_SSFLUX endif #define ROMS_MODEL #define SWAN_MODEL #define WRF_MODEL # define MCT_INTERP_OC2AT # define MCT_INTERP_WV2AT #define WEC_VF #define WDISS_WAVEMOD #define UV_KIRBY #define COARE_TAYLOR_YELLAND #ifdef WRF_MODEL # define ATM2OCN_FLUXES # define ANA_SSFLUX #undef BULK_FLUXES endif COUPLING WAVE-CURR. Wave in WRF

  7. Comparing model performances Heat Fluxes have been identified as a main source of uncertainty (Mihanovich et al. 2013)

  8. WORST S.A Net Heat Fluxes patterns BEST S.A A.O A.O.W

  9. What COAWST made possible, and some open issues • Unprecedented (in the Adriatic) fully coupled Atmosphere-Ocean-Waves application • Significantly better atmosphere model performances with a high resolution, dynamic SST Atmosphere-Ocean interaction reduces atmosphere model drift over time. • Wave-Atmosphere interaction improves SST distribution BUT IT IS IMPORTANT TO UNDERSTAND PHYSICAL • Different masking between models gives rise to some phenomena involving ocean dynamics

  10. Concerning grid issues

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