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    Tides of Massachusetts and Cape Cod Bays

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    WHOI-92-35.pdf (3.667Mb)
    Date
    1992-09
    Author
    Irish, James D.  Concept link
    Signell, Richard P.  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/857
    Location
    Massachusetts Bay
    Cape Cod Bay
    DOI
    10.1575/1912/857
    Keyword
     Tides; Currents; Internal waves 
    Abstract
    The Massachusetts Bays Program made bottom pressure and water velocity observations in Massachusetts and Cape Cod Bays during 1990 and 1991. In the Bays, the sea surface elevation appeared to rise and fall in phase with equal amplitudes at each diurnal or semidiurnal tidal frequency. There is some amplification in Boston and Provincetown harbors. The semidiurnal tides (particularly the M2 constituent) dominate. Massachusetts and Cape Cod Bays are part of the Gulf of Maine/Bay of Fundy system which is resonant near the semidiurnal frequency. This resonance amplifies the importance of the semidiurnal tides so that diurnal and higher harmonic tides become negligible. The sea level tides force currents which move with the same frequencies, but whose amplitudes are affected by the bathymetry. The strongest currents exist in the channel between Race Point and Stellwagen Bank where tidal currents exceed 1 knot. Analysis of current records for their tidal signal is complicated by internal tides which contaminate the records. These internal waves at tidal frequency exist on the stratification in the water column, and disappear during winter well-mixed times. At other times they must be considered as a signifcant source of energy for mixing and resuspension of sediments.
    Collections
    • WHOI Technical Reports
    • Applied Ocean Physics and Engineering (AOP&E)
    Suggested Citation
    Technical Report: Irish, James D., Signell, Richard P., "Tides of Massachusetts and Cape Cod Bays", 1992-09, DOI:10.1575/1912/857, https://hdl.handle.net/1912/857
     
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