Ocean-atmosphere simulations of the Eastern Mediterranean using COAMPS TM /NCOM Objectives  Simulate Mediterranean and subregional (e.g., Adriatic and.

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Ocean-atmosphere simulations of the Eastern Mediterranean using COAMPS TM /NCOM Objectives  Simulate Mediterranean and subregional (e.g., Adriatic and Aegean Seas) atmospheric and oceanic circulation at high resolution as a testbed for investigating ocean/atmosphere coupling strategies  Document and understand response of marginal seas to forcing by strong winds and river run-off/outflow from adjacent water bodies  Aid in planning of field campaigns and employ observational data for model validation and data assimilation Julie Pullen Paul Martin James Doyle Richard Hodur

Outline  Model configuration  Model forcing  Simulations during etesian wind events

Domain Configuration 6 km NCOM 27 km 81 km COAMPS TM Momentum, Heat fluxes

Nesting for Focus on Adriatic Sea 6 km NCOM 27 km 81 km COAMPS TM Momentum, Heat fluxes 36 km 12 km COAMPS TM 4 km 2 km NCOM Momentum, Heat fluxes Initial conditions and lateral boundary forcing

2 km NCOM Aegean Sea nest (Paul Martin)

COAMPS TM / atmosphere MVOI Specifications Features  Analysis: multivariate OI of winds and heights (univariate of temperature and moisture) ingests observations from radiosondes, surface observations, aircraft, and satellites  Model: Non-hydrostatic, C-grid, sigma vertical coordinate  81/ 27 km, 30 levels  grid size of inner nest: 193 x 97  12 hr incremental data assimilation cycle with 24 hr forecast  reanalysis has been run for Oct 1998 – June 2002, and is ongoing

NCOM Specifications Features  Ocean model based on POM: C-grid, hybrid sigma-z vertical coordinate, options for parametrization of turbulence, order of advection scheme (Paul Martin, NRL-Stennis)  forced by hourly COAMPS TM momentum and heat fluxes  6 km, 40 levels (15 sigma levels)  grid size: 576 x 288  starting from multi-year spin-up beginning 1999  climatological river discharge from 54 major rivers

NCOM Bathymetry in the Aegean

Simulations (summer 2001)  COAMPS Eastern Mediterranean wind  COAMPS/NCOM Aegean wind/surface elevation  NCOM climatological simulation with BSW