November 28, 2023 — Astudy by scientists with the National Oceanic and Atmospheric Administration recommends at least 24 hours of acoustic monitoring for detecting endangered North Atlantic right whales before construction work at offshore wind energy construction sites, to reduce danger to the marine mammals from the loud undersea noise of pile driving.
Visual monitoring around work sites – with trained observers on vessels watching for whales – is one protocol with wind power companies and government regulators. Another is passive acoustic monitoring (PAM) which uses sensors to pick up and record whales’ vocalizations underwater.
Federal monitoring requirements now call for 1 hour of acoustic monitoring for whale activity before pile driving for turbine foundations. It is an “intense, impulsive noise that radiates into the surrounding environment as turbines are hammered into the sea floor,” the paper notes.
The study by a team at NOAA’s Northeast Fisheries Science Center, published Nov. 3 in the ICES Journal of Marine Science, calls for pushing out acoustic monitoring at least 24 hours ahead of construction schedules. Wind power turbines are now being erected on the Vineyard Wind and South Fork project sites off southern New England.