||Resonant Oscillation in Duluth-Superior Harbor.
Jordan, Thomas F. ;
Stortz, Kirby R. ;
Sydor, Michael ;
||Minnesota Univ.-Duluth. Dept. of Physics.;Environmental Research Lab.-Duluth, MN.
Water flow ;
Resonance frequency ;
Mathematical models ;
Density(Mass/volume) Periodic variations ;
Lake Superior ;
Water levels ;
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The treatment of Duluth-Superior Harbor inlets as coupled oscillators yields Helmholtz resonance periods of 2.1-2.3 h. Analysis of water level oscillations in the harbor and currents in an inlet channel shows a 2.1-h mode, which seems to be excited by lake oscillations of nearly the same period. (Copyright (c) 1981, by the American Society of Limnology and Oceanography, Inc.)