Accession Number : AD0663467

Title :   STUDIES OF INERTIAL MOTION AND ASSOCIATED WAVES IN LAKE MICHIGAN.

Descriptive Note : Final rept., Jul 63-Dec 67,

Corporate Author : WISCONSIN UNIV MILWAUKEE CENTER FOR GREAT LAKES STUDIES

Personal Author(s) : Mortimer,Clifford H.

Report Date : NOV 1967

Pagination or Media Count : 144

Abstract : The report summarizes, mainly in a series of diagrams, the results of an investigation of the temperature distribution in a region of Lake Michigan, roughly bounded by Lat. 43 degrees 00' and 43 degrees 30' N, during the period of summer stratification in 1963. Measurements were made with bathythermographs from a railroad ferry vessel and from a research vessel, which was also used, at a mid-lake anchor station, as a platform to measure the vertical distribution of current speed and direction. The measurement program was designed to test the writer's predictions (Mortimer, 1963) that a dominant component of the internal wave pattern, in Lake Michigan in summer and in regions remote from shores, could be described in terms of Poincare waves with characteristic periods close to but always less than the local inertial period (17.5 hr) and with associated currents exhibiting clockwise rotation of the same periodicity and following an elliptical track. The report is prefaced by an illustrated account of internal wave (long wavelengths) and current patterns, associated with Kelvin and Poincare waves, in a rotating, two-layered, rectangular basin of uniform depth and of Great Lakes dimensions. Events observed in Lake Michigan are interpreted in terms of this model. (Author)

Descriptors :   (*LAKE WAVES, GREAT LAKES), (*GREAT LAKES, PHYSICAL PROPERTIES), OSCILLATION, INERTIA, WATER WAVES, WAVE PROPAGATION, MICHIGAN, CORIOLIS EFFECT, WIND, METEOROLOGICAL PHENOMENA, HYDRODYNAMICS, MOTION, TEMPERATURE

Subject Categories : Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE