A Controllable Real-Time Data Collection System for Coastal Oceanography

Dimmler, D. G.; Huszagh, D.; Rankowitz, S.; Scott, J. F.

doi:10.1109/oceans.1976.1154239

Cited by 11 publications

(2 citation statements)

References 6 publications

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“…The design and construction of various components of the moored array system were carried out by the engineering staff of Brookhaven National Laboratory and have been partly described by Dimmler et al [1976].…”

Section: Appendixmentioning

confidence: 99%

Longshore pressure gradients caused by offshore wind

Csanady¹

1980

J. Geophys. Res.

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Observations of currents 12 km south of the Long Island coast show that strong offshore winds could generate considerable longshore nontidal flow well below any surface Ekman drift. A momentum balance calculation in the longshore direction shows a surface level gradient of order 10 -6 to be the proximate cause of the longshore flow. A very simple model of the observed phenomena is a sloping plane beach acted upon by cross-shore wind, varying sinusoidally in the longshore direction. With bottom friction parameterized by a linear law, a parabolic equation is found to govern steady state flow, expressing a balance of vorticity tendencies due to cross-isobath flow, curl of bottom stress, and any forcing. Calculated solutions for variable cross-shore wind show a trapped pressure field on the inner shelf which controls the transition between an essentially frictionless momentum balance on the outer shelf to frictionally dominated flow at the shore. Realistic estimates of the parameters entering the theory suggest that the longshore gradients associated with the trapped inner shelf field are of the correct order of magnitude to explain the generation of longshore flow by a system of cross-shore winds.

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Section: Appendixmentioning

confidence: 99%

Longshore pressure gradients caused by offshore wind

Csanady¹

1980

J. Geophys. Res.

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“…The mooring array consisted of four moorings situated at 3,6,9, and 12 km from shore on a line nearly perpendicular to the coast and local isobaths. Moorings were of Shelton spar buoy-type (Dimmler et al 1976). Each carried four instrument packages, consisting of a thermistor, an inductance conductivity cell, and an orthogonal-axis electromagnetic current meter (Marsh-McBirney Inc., model 7 11 or 555).…”

Section: Introductionmentioning

confidence: 99%

Intrusions of outer shelf and slope water within the nearshore zone off Long Island, New York1,2

Churchill

1985

Limnology & Oceanography

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From 1974 through 1978 studies were made of temperature, salinity, and water velocity, by hydrographic surveys and from moored instruments, in the waters within 15 km of the southern Long Island coastline. Data of late summer reveal frequent intrusions of anomalous water which appear to be of slope or outer shelf origin. Three intrusions of notably differing character are described. Two occurred at middepth, within the pycnocline. Concurrent hydrographic and current meter data suggest that these water masses were transported shoreward due to circulation forced by wind stress and by longshore density gradients. The third intrusion was initially observed near the surface and was of anomalously high temperature. Its T/S relation was similar to a warm and salty bolus detected 12 days earlier in the midshelf region. Hydrographic data suggest that this bolus may have been a detached parcel of slope water. Such intrusions may commonly occur during summer and fall and may be related to the appearance of tropical fish in the Long Island -vicinity during these seasons.

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