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Comments Off on Quieter Oceans Offer a Rare Chance to Listen
WOODS HOLE, Massachusetts, April 21, 2021 (ENS) – Coronavirus pandemic travel restrictions and economic slowdowns slammed the brakes on human activities in the oceans starting last spring and ongoing. Noise levels are down as cargo ships, cruise ships, and seafloor exploration vessels have slowed or stopped their operations.
The relative silence creates a unique moment for scientists to begin a time-series study of the impacts of human sounds on marine life they have planned for years.
Using hydrophones, microphones that detect sound waves underwater, the study will measure ambient sound in hundreds of ocean locations to reveal variability and changes in intensity at a range of frequencies.
âWeâd like the word soundscape to become a lot better known. Sound is light in the oceans. It illuminates the ocean for many animals. They use it to communicate, to hunt, and can be harmed by noise at excess,â Ausubel said.
He and colleagues â including specialists at St Andrews â plan to expand the hydrophone network, particularly in the southern hemisphere, to more than 500 devices. Using modelling and data collaborations with shipping companies and other ocean users, they hope to produce a global map of ocean sound within the coming years. This should reveal important patterns, such as increases in noise along shipping lanes and near oilfields and windfarms, which could prove as important for ocean health and regulation as roadside air pollution monitoring, or water-contamination measurements near factories.
The Covid-19 lockdown has produced the quietest year for the world’s oceans in recent memory, according to a group of scientists working on a global map of underwater soundscapes. Noise pollution from ship engines, trawling activities, oil platforms, subsea mining and other human sources declined significantly last spring, say the researchers, who are part of a collaborative network of 231 non-military hydrophones. They believe the relative hush.
Pandemic made 2020 the year of the quiet ocean , say scientists msn.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from msn.com Daily Mail and Mail on Sunday newspapers.