Accession Number : ADA289492

Title :   Meteorological and Oceanographic Data Collected During the ASREX 91 Field Experiment.

Descriptive Note : Technical rept.,

Corporate Author : WOODS HOLE OCEANOGRAPHIC INSTITUTION MA

Personal Author(s) : Galbraith, Nancy R. ; Gnanadesikan, Anand ; Tupper, George H. ; Way, Bryan S. ; Terray, Eugene A.

PDF Url : ADA289492

Report Date : AUG 1994

Pagination or Media Count : 123

Abstract : The 1991 Acoustic Surface Reverberation Experiment (ASREX 91) took place in November and December off the coast of British Columbia. As part of this experiment, three moorings were deployed to characterize the environmental background. The moorings consisted of a meteorological/oceanographic mooring designed to measure surface meteorology, current and temperature in the upper 120 meters, and nondirectional wave parameters and two wave moorings which were instrumented with pitch-roll buoys to characterize the directional wave spectrum. This report presents results from these three moorings. The conditions seen during the experiment were extremely rough, with wind speeds at 3.4m above the water surface reaching a maximum of 22 cm/s and wave heights reaching a maximum of over 10 meters. The air-sea flux of heat was strongly cooling, and the mixed layer deepened over the course of the experiment from approximately 40 to approximately 70 meters. Spectra of the temperature showed a strong semidiurnal tidal signal associated with temperature excursions of several degrees C. The velocity signal showed strong inertial oscillations with amplitudes of 30-50 cm/s. Weaker low-frequency and semidiurnal tidal signals were also seen. The waves were very strong with significant wave heights of 5-6 meters persisting for up to 2 weeks at a time. Waves were generally out of the south or the west.

Descriptors :   *METEOROLOGICAL DATA, *OCEANOGRAPHIC DATA, *MOORING BUOYS, VELOCITY, DENSITY, ROLL, COASTAL REGIONS, OCEAN WAVES, PITCH(MOTION), OCEAN CURRENTS, OCEAN SURFACE, WIND, ATMOSPHERIC TEMPERATURE, ACOUSTIC DETECTION, METEOROLOGICAL INSTRUMENTS, BAROMETRIC PRESSURE, SALINITY, AIR WATER INTERACTIONS, HEAT FLUX, SURFACE TEMPERATURE, HUMIDITY, REVERBRATION, BRITISH COLUMBIA, GRAVITY WAVES.

Subject Categories : Meteorology
      Physical and Dynamic Oceanography
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE