Accession Number : AD0764646


Title :   The Net Circulation in the West Passage of Narragansett Bay


Descriptive Note : Technical rept.


Corporate Author : RHODE ISLAND UNIV KINGSTON NARRAGANSETT MARINE LAB


Personal Author(s) : Weisberg, Robert H ; Sturges, III, Wilton


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/764646.pdf


Report Date : Mar 1973


Pagination or Media Count : 110


Abstract : Narragansett Bay is a weakly stratified estuary comprised of three connecting passages of varying depths. The vertical distribution of horizontal velocity was observed in the West Passage using moored current meters. The instantaneous motion was characterized by semi-diurnal tidal currents of amplitude 25-60 cm/s. These currents exhibited a phase advance with depth (total water depth=12.8 m) ranging with lunar phase from 0-3 hrs. The primary objective of the study was the analysis of the net circulation, i.e., the motion exclusive of the periodic tides. The net current time series obtained by filtering out the tidal periodicities were found to be an order of magnitude less than the instantaneous motion and well correlated to the prevailing 2-10 m/ s wind. For periodicities about two days, the squared coherence and phase between the longitudinal components of wind and net near surface current were 0. 7 and 3 hours respectively.


Descriptors :   *NARRAGANSETT BAY , *OCEAN CURRENTS , TIDES , CORRELATION TECHNIQUES , WIND , TIME SERIES ANALYSIS


Subject Categories : Physical and Dynamic Oceanography


Distribution Statement : APPROVED FOR PUBLIC RELEASE