BBC Earth (Asia) - - Science -

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.

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