LIS_FVCOM_C

The Long Island Sound (LIS) operational forecast system uses the Finite Volume Community Ocean Model (FVCOM) as the hydrodynamic core to simulate ocean circulation in the sound. The model domain covers the sound and the adjacent shelf from east of Narragansett Bay down to the New Jersey coast. The horizontal resolution in the sound is less than 500 m. Vertically, there are 10 terrain-following s layers, with a minimum water depth of 7 m. The hourly surface forcing (winds and heat flux) and boundary forcing are obtained from the Northeast Coastal Ocean Forecast System (NECOFS) daily. To better simulate the tides in the sound, the NECOFS boundary elevations are detided to only supply the averaged shelf elevation; the tides are added through the open boundary with 67 tidal constituents. The operational high resolution model spins up 24 hours from the previous day and forecasts the next 72 hours. It offers the hourly output of water level, currents, salinity, and temperature fields.

Maine_FVCOM_UMass_C

Finite Volume Community Ocean Model (FVCOM) covers the coastal waters extending from the Delmar peninsula northeast to the northeast tip of Nova Scotia. FVCOM Maine uses an unstructured grid in the horizontal and a sigma coordinate with 41 layers in the vertical. The horizontal resolution ranges from ~200 m in Nantucket Sound to a maximum of 10-20 km along the open boundary in the deep ocean off Georges Bank. FVCOM Maine uses a hybrid vertical coordinate system. In water depths shallower than 200 meters, the thickness of the top layer is equal to the ratio of local water depth to the total number of vertical layers, which ranges from 5 m at a depth of 200 m to 0.5 m or less in the region with the water depth of 20 m or shallower. The model time step is 240 seconds. The surface wind forcing is predicted using a regional mesoscale weather model (WRF/NAM) with 9 x 9 km spacing. FVCOM Maine includes a surface wave forecast (significant wave height and peak period) in addition to the surface elevation and 3D currents, temperature and salinity forecast. The freshwater inflow from 46 major rivers are specified along the coastline. FVCOM Maine is run as part of the NERACOOS Northeast Coastal Ocean Forecast System (NECOFS) produced by the Marine Ecosystem Dynamics Modeling Laboratory (MEDML) at the School for Marine Science and Technology, University of Massachusetts-Dartmouth.

STOFS_ATL_C

The Surge and Tide Operational Forecast System 3D component for the Northwest Atlantic basin (STOFS-3D-Atlantic), covers the U.S. East Coast, Gulf of Mexico, Puerto Rico, and the Gulf of St. Lawrence. STOFS-3D-Atlantic utilizes the Semi-implicit Cross-scale Hydroscience Integrated System Model (SCHISM) as its hydrodynamic modeling core. Its unstructured grid comprises 2,926,236 nodes and 5,654,157 triangular or quadrilateral elements, with resolutions ranging from 1.5–2 km near the shoreline, ~600 m in floodplains, down to 8 m in watershed rivers, and 2–10 m along levees. The landward boundary of the domain along the U.S. coastline corresponds to the 10-m contour above xGEOID20B, encompassing the coastal transition zone most susceptible to coastal and inland flooding. Vertical grid layers vary from 49 in the deepest parts of the Atlantic Ocean to a single layer in floodplain areas. The water levels generated by STOFS-3D-Atlantic represent the combined tidal and subtidal water surface elevations, all referenced to xGEOID20B. The STOFS-3D-Atlantic system provides users with 24-hour nowcasts and up to 96-hour forecast guidance for water level conditions, along with two- and three-dimensional fields of water temperature, salinity, and currents. It operates once daily at 12 UTC.

NCOM_USec

The U.S. Navy Coastal Ocean Model (NCOM) was developed by the Naval Research Laboratory (NRL) and is maintained by the U.S. Navy Fleet Numerical Meteorology and Oceanography Center (FNMOC).

ADCIRC_East_tides

(http://www.adcirc.org/index.html). ADCIRC East and West in SAROPS is strictly the tidal driven version of ADCIRC. ADCIRC was run offline with forcing provided by the Oregon State University global tidal model as well as direct astronomical tidal forcing terms. ADCIRC currents were analyzed to determine tidal constituents which are stored in a database on the EDS server. In response to a request from the SAROPS user, a local computation is done on the EDS server to recreate real time tidal currents from the tidal constituent database. ADCIRC uses the finite element method in space allowing the application of highly flexible, unstructured grids containing higher resolution inshore and coarser resolution offshore where it is not needed. ADCIRC East and West in SAROPS provides depth-averaged tidal currents (100% of the local water depth). ADCIRC in the EDS does not include wind forcing or river run-off.