Salt flux into coastal river plumes: Dye studies in the Delaware and Hudson River outflows
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ID: 305417
2009
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Abstract
The results of ten dye tracer experiments conducted in 2003–2006 to study the dispersion of the outflow of the Delaware and Hudson Rivers are presented. A fluorescent dye tracer was used to track the river plume and to measure directly the salt flux into the plume. A variety of flow regimes were encountered. During strong upwelling events, a salt flux of 3 10 4 kg m s 1 at the leading edge of the plume implies a vertical diffusivity of Kz 3 10 4 m s . Comparable salt flux was measured at the leading edge of a buoyancy-driven coastal current with Kz 6.3 10 4 m s . For weaker wind events Kz was 10 4 m s . Using a gradient Richardson number (Ri), these observations were replicated by a 1-D model of vertical salt flux to within a factor of 2. Upwelling events are the most efficient mechanism for dispersing the river plume water over the coastal shelf because the plume’s offshore displacement is combined with a horizontal diffusivity measured to be 150 m s 1 over the two-day period of each experiment.
| Reference Key |
openalex_W2032226927
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|---|---|
| Authors | Robert W. Houghton, Robert J. Chant, Ana E. Rice, Charles E. Tilburg |
| Journal | journal of marine research |
| Year | 2009 |
| DOI |
10.1357/002224009792006142
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| URL | |
| Keywords | Keywords not found |
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