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contributor authorGerbi, Gregory P.
contributor authorChant, Robert J.
contributor authorWilkin, John L.
date accessioned2017-06-09T17:19:41Z
date available2017-06-09T17:19:41Z
date copyright2013/09/01
date issued2013
identifier issn0022-3670
identifier otherams-83248.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4226452
description abstracthis study examines the dynamics of a buoyant river plume in upwelling-favorable winds, concentrating on the time after separation from the coast. A set of idealized numerical simulations is used to examine the effects of breaking surface gravity waves on plume structure and cross-shore dynamics. Inclusion of a wave-breaking parameterization in the two-equation turbulence submodel causes the plume to be thicker and narrower, and to propagate offshore more slowly, than a plume in a simulation with no wave breaking. In simulations that include wave breaking, the plume has much smaller vertical gradients of salinity and velocity than in the simulation without breaking. This leads to decreased importance of shear dispersion in the plumes with wave breaking. Much of the widening rate of the plume is explained by divergent Ekman velocities at the off- and onshore edges. Some aspects of plume evolution in all cases are predicted well by a simple theory based on a critical Richardson number and an infinitely deep ocean. However, because the initial plume in these simulations is in contact with the sea floor in the inner shelf, some details are poorly predicted, especially around the time that the plume separates from the coast.
publisherAmerican Meteorological Society
titleBreaking Surface Wave Effects on River Plume Dynamics during Upwelling-Favorable Winds
typeJournal Paper
journal volume43
journal issue9
journal titleJournal of Physical Oceanography
identifier doi10.1175/JPO-D-12-0185.1
journal fristpage1959
journal lastpage1980
treeJournal of Physical Oceanography:;2013:;Volume( 043 ):;issue: 009
contenttypeFulltext


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