Accession Number : AD0661834

Title :   POWER SPECTRA OF BOTTOM PRESSURE FLUCTUATIONS IN THE NEARSHORE GULF OF MEXICO DURING 1962 AND 1963,

Corporate Author : NAVY MINE DEFENSE LAB PANAMA CITY FLA

Personal Author(s) : Bennett,Carl M.

Report Date : NOV 1967

Pagination or Media Count : 33

Abstract : A study of the power spectra of over twelve hundred 30-minute records of sea bottom pressure fluctuations is presented. The data were collected in the Gulf of Mexico off Panama City, Florida, at a depth of 19.2 meters from June 1962 through May 1963. The emphasis is on the method of data presentation rather than collection, analysis, and interpretation. The power spectra are presented as three-dimensional plots and contour plots of power spectral density versus frequency and time. Plots of the root mean square value, maximum power density and frequency of the maximum power density, together with plots of the power spectral density at several specific frequencies, are shown as functions of time and compared. Some of the more interesting time sequences of power spectra are examined in relation to the weather in the Gulf of Mexico. It is observed that the use of the narrow-band gaussian model for the seaway is reasonable, and that the spectrum can change significantly over a 3-hour period. The buildup and decay of power spectral level during a Gulf storm in otherwise calm weather is illustrated. (Author)

Descriptors :   (*OCEAN WAVES, PRESSURE), POWER SPECTRA, OCEAN BOTTOM, PERIODIC VARIATIONS, WEATHER, FREQUENCY, STORMS, DEEP WATER, MEXICO GULF

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE