Accession Number : AD0723602

Title :   Fourier Analysis of Weather and Wave Data from Holland, Michigan, July 1970.

Descriptive Note : Technical rept.,

Corporate Author : WILLIAMS COLL WILLIAMSTOWN MASS

Personal Author(s) : Fox,William T. ; Davis,Richard A. , Jr

Report Date : 01 MAY 1971

Pagination or Media Count : 84

Abstract : During July, 1970, weather and wave parameters were measured at two hour intervals on the beach and in the nearshore area two miles north of Holland, Michigan. Parameters measured include barometric pressure; wind speed and direction; air and water temperature; sky condition; lake and groundwater level, wave period and height; breaker depth, type, distance and angle; and longshore current velocity. The computer was used to calculate the phase and amplitude for the first 15 Fourier harmonics and to plot the observed data and cumulative curves. The curves were influenced by low pressure systems which passed north of the area of 4, 9, 15 and 19 July. Wave height and direction are related to cyclonic winds moving counterclockwise around the low pressure system. Longshore current velocity can be predicted as a constant times the derivative of the barometric pressure. (Author)

Descriptors :   (*METEOROLOGICAL PHENOMENA, FOURIER ANALYSIS), (*LAKE WAVES, FOURIER ANALYSIS), (*TIME SERIES ANALYSIS, SPECTRUM ANALYZERS), HARMONIC ANALYSIS, COMPUTER PROGRAMS, SERIES(MATHEMATICS), MICHIGAN, GREAT LAKES, ATMOSPHERIC TEMPERATURE, BAROMETRIC PRESSURE, CYCLONES, WIND

Subject Categories : Meteorology
      Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE