Evaluation of transport relative to the tidal mixing front on Southern Georges Bank
Author(s)Katrein, Jody M. (Jody Marie), 1977-
Woods Hole Oceanographic Institution.
James R. Ledwell.
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As part of Phase III of the U.S. GLOBEC Georges Bank program, drogued drifters and dye tracer were released into the pycnocline on the southern flank of Georges Bank to measure advective and diffusive transport relative to the tidal mixing front in May 1999. Potential density measurements placed the tidal mixing front around the 50-55 m isobath on the southern flank. Drogued drifter movement relative to the front was on the order of the drifter's slip velocity and therefore did not support the existence of a mean, advective flow. No movement relative to the front of the dye patch center of mass also indicated a lack of advective flow. Diffusive transport did occur as the dye patch spread laterally both toward and away from the front much as would be predicted by the diffusion relationship of Okubo (1971), who summarized diffusion experiments in the surface ocean. The dye did not spread symmetrically, but was rather elongated along the isobaths. This can be attributed to vertical shear in the along-isobath current that was measured by the shipboard ADCP.
Thesis (S.M.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Ocean Engineering and the Woods Hole Oceanographic Institution), September 2001.Includes bibliographical references (leaves 65-67).
DepartmentMassachusetts Institute of Technology. Dept. of Ocean Engineering.; Joint Program in Applied Ocean Science and Engineering.; Woods Hole Oceanographic Institution.; Massachusetts Institute of Technology. Department of Ocean Engineering
Massachusetts Institute of Technology
Ocean Engineering., /Woods Hole Oceanographic Institution. Joint Program in Applied Ocean Science and Engineering., Woods Hole Oceanographic Institution.