MESSED-UP MARINE SOUNDS
In water, sound travels faster at warmer temperatures. If the ocean is warmer or colder than we expect, it throws out our underwater communications systems. This could lead to problems finding an aeroplane’s black box, or make it hard to avoid whales and dolphins. It could also interfere with animals’ own communication systems, crucial in mating and migration. Researchers have already discovered an area of the Arctic Ocean where sound travels four times further than it did a decade ago.