Publication Detail

Nantucket Sound Circulation - Observations, Analysis and Model Development

Richard Limeburner

Moored measurements of velocity, pressure, temperature and conductivity (salinity) were made on a bottom tripod located at a depth of 26m approximately half way between Nobska Point, Woods Hole and West Chop, Martha’s Vineyard on five deployments during July 16, 2004 to September 4, 2007. The currents were dominated by strong semidiurnal tidal currents up to 200 cm/s. The maximum tidal current was in phase with the maximum tidal elevation indicating the local tide is characterized by a progressive wave. The mean flow was southwestward throughout the well mixed water column. The low-frequency current variability was dominated by the windstress. The moored data compared well with newly developed FVCOM model output (Chen et. al., 2007). FVCOM features an unstructured grid in the horizontal and a bottom-following sigma coordinate system in the vertical that provides excellent geometric flexibility and solves the governing equations in integral form, thus ensuring conservation of mass, momentum, heat, and tracers such as salinity. These results are now being used to develop an operational coastal management model system for the New England Shelf (NES) with the focus on Nantucket Sound (NS) and Buzzard Bay (BB).

type: Internet resources, topical websites

Parent Project

Project No.: 2008-R/RC-107
Title: Data Assimilation and Optimal Observing Systems Design Experiments in Massachusetts Waters: Moored and Drifter Measurements