Near-Real-Time Simulation of the Response of the Gulf of Maine to Realistic Wind Forcing (original) (raw)

Abstract

The barotropic version of the 3-dimensional, finite element Dartmouth circulation model called Quoddy has been used to simulate the response of the Gulf of Maine to wind forcing at 1/16 M2 tidal cycle (0.78 hr) increments in near real-time. Model forcing consists of predicted M2 tidal sea level around the open ocean boundary and surface wind stress derived from NDBC buoy-measured winds at severl sites in the region. Nontidal sea level forcing along the Scotian shelf transect is inferred from a wind-forced statistical model. Nowcast model products include 3-D currents and sea level at the model resolution of about 10 km in the Gulf of Maine and 5 km along the coastalines. A comparison of model and observed M2 tidal sea level results at 49 sites show average rms differences of 9 cm and 7 degrees for amplitude and phase, respectively. The nontidal results of the model, which are consistent with observed Gulf-wide response to wind forcing, will be presented.

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