Chen, C. University of Georgia, chen@whale.marsci.uga.edu
Zhu, J. University of Georgia, zhu@dolphin.marsci.uga.edu
Ralph, E. University of Minnesota, eralph@d.umn.edu
Green, S. Michigan Technological University, sgreen@mtu.edu

 
A 3-D PROGNOSTIC MODELING STUDY OF THE KEWEENAW CURRENT IN LAKE SUPERIOR
 
The Keweenaw Current, observed along coast of the Keweenaw Peninsula in Lake Superior during July 1973, was simulated using a three-dimensional (3-D), non-orthogonal coordinate transformation, primitive equation model. The model results have shown that the structure of thermal front and coastal jet current varied significantly with wind. The eastward along-shelf current tended to intensify dramatically during a southerly or southwesterly wind and to reduce significantly during a northerly or northeasterly or northwesterly wind. Heating played a key role in maintaining the intensity of the thermal front and thus strength of the long-shelf jet current. Relatively strong near-inertial oscillations occurred episodically under a clockwise-rotating wind. The amplitude of the oscillations was largest at the surface and the center of the lake. Particle trajectories revealed that the most significant cross-frontal water transport occurred under the upwelling-favorable wind condition. The model-predicted along-shelf current was in good agreement with observed currents at buoy stations near the Eagle Harbor.
 
Day: Thursday, Feb. 4
Time: 10:30 - 10:45am
Location: Eldorado Hotel
 
Code: SS52TH1030E