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Data from Andrea Ogston, University of Washington

New Features of ROMS 2.2+ Applied in the Adriatic Sea R ich Signell, Chris Sherwood, Courtney Harris, Aaron Bever, Sandro Carniel, Jacopo Chiggiato, Ivica Janekovic. Net Erosion and Deposition during Winter 2002-2003.

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Data from Andrea Ogston, University of Washington

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  1. New Features of ROMS 2.2+ Applied in the Adriatic SeaRich Signell, Chris Sherwood, Courtney Harris, Aaron Bever, Sandro Carniel, Jacopo Chiggiato, Ivica Janekovic Net Erosion and Deposition during Winter 2002-2003. Bottom sediment concentrations during a strong wind event (Bora). Sediment transport capability has been enhanced in ROMS 2.2 with a new bottom boundary layer routine SSL_BBL that includes a rippled bed simulation, the effect of ripples on combined wave and current stress, and form drag corrections. Using the new TS_MPDATA_T advection was essential for preventing negative sediment concentrations. Data from Andrea Ogston, University of Washington Tools designed to view/analyze CF-compliant data like the Integrated Data Viewer (IDV) will now work directly on ROMS history, restart, averages and diagnostics files, since ROMS NetCDF output is now 100% CF-compliant. (a) (b) (a) (a) (b) All the processes that affect bottom stress can be output and dissected in ROMS2.2. Sediment is suspended by the combined wave and current stress corrected to account for form drag due to ripples (a). The percentage of time that the critical shear stress for erosion of fine sand is exceeded (b). ROMS2.2 has many options to address the effects of surface wave breaking on near-surface physics. GLS_MIXING can be defined with parameters selected to reproduce observed dissipation rates, and CHARNOK can be specified to make the surface roughness a function of the wind stress. CRAIG_BANNER provides for a surface TKE flux from breaking waves. During strong wind (a) and near-surface flow conditions (b) these parameters can have a significant effect on near-surface drift (c). (c) Heat Flux: LAMI Met Model w/ ROMS SST using COARE3.0 formula Heat Flux: LAMI Met Model Fluxes (a) (b) ROMS 2.2, released in May 2005, introduced a number of new features which have been proved beneficial in our study of the Adriatic Sea. ROMS2.2 has a new BULK_FLUXES routine implementing COARE3.0, which has an improved parameterization for strong wind conditions, and also allows representation of surface wave effects. In the Adriatic Sea, using the COARE3.0 routines using the ROMS SST provided greatly improved heat fluxes compared to those directly from the met model . The met model heat flux (a) had too much cooling during strong wind events, while the ROMS/COARE3.0 heat flux (b) was not distinguishable from the observations (c). (c)

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