Acoustic effects of oil production activities on bowhead and white whales visible during spring migration near Pt. Barrow, Alaska, 1990 phase: sound propagation and whale responses to playbacks of continuous drilling noise from an ice platform, as studied in pack ice conditions
William John Richardson, L.G.L. Limited, Environmental Research Associates, United States. Minerals Management Service. Procurement Operations
LGL Ltd., 1991 - Nature - 311 pages
Describes results from 1990, the second year of a continuing study of the effects of noise from oil production activities on bowhead and (secondarily) white whales during their spring migrations around Alaska. Additional data was collected on physical acoustics, whale reactions to helicopters, and reactions of bowheads to the same type of drilling noise used in 1989.
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STUDY AREA WEATHER AND ICE
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1/3-octave band aerial observations Alaska ambient noise levels Barrow bearded seals Beaufort Sea blow intervals bowhead calls bowhead whales bowheads and white broadband Chukchi Sea CN CN CN CN rH control periods CPA distances decibels distorted dive drilling noise drilling platform sounds drillsite equations Figure helicopter helicopter overflights hundred meters hydrophone Hz band ice camp ice conditions ice edge ice-based crew ice-based observers industrial noise infrasonic components Infrasounds Karluk sounds main nearshore lead man-made noise measured mothers and calves one-third octave band open water operating projector pack ice Physical Acoustics playback experiments projected sounds received levels recorded rH CN rH rH rH Richardson sightings sonobuoy sound levels sound projector study area Table theodolite TL Test transmission loss tests traveling Twin Otter underwater sound undistorted playback whale behavior whales migrating white whales