Results April: Physics + Far-Field Forecast Products

C. Werner, B. Blanton, R. Luettich

As part of the 1999 frontal exchange field program for Real-Time Data Assimilation (RTDA) on Georges Bank, the University of North Carolina provided wind-stress and oceanic surface elevation forecasts and hindcasts for the Georges Bank region. Elevation boundary conditions were generated for two model domains: the BANK150 domain and a domain that includes higher resolution along the Georges Bank Northern Flank. The boundary conditions for the model domains include a contribution due to the NW Atlantic's response to large-scale atmospheric forcings. This far-field NW Atlantic response is computed by forcing the finite-element model ADCIRC with the meteorological forecasts from the NWS model AVN, on a FEM grid that encompasses the NW Atlantic ocean west of 60W. The elevation along the Georges Bank domain boundary nodes is extracted from the NW Atlantic ADCIRC solution and used to force the QUODDY regional forecasts. The procedure for extracting the atmospheric variables of interest and for producing the elevation forecasts is shown in Figure (1).