‘The narwhals stop calling’: how the noise from ships is silencing wildlife in the Arctic

By Jenn Thornhill Verma – The Guardian

The delicate clicks and whistles of narwhals carry through Tasiujaq, locally known as Eclipse Sound, at the eastern Arctic entrance of the Northwest Passage. A hydrophone in this shipping corridor off Baffin Island, Nunavut, captures their calls as the tusked whales navigate their autumn migration route to northern Baffin Bay.

But as the Nordic Odyssey, a 225-metre ice-class bulk carrier servicing the nearby iron ore mine, approaches, its low engine rumble gives way to a wall of sound created by millions of collapsing bubbles from its propeller. The narwhals’ acoustic signals, evolved for one of Earth’s quietest environments, fall silent.