Winds im­pact sea tem­per­a­tures

Down to Earth - - SCIENCE -

CHANGES IN ocean tem­per­a­tures have been at­trib­uted to global warm­ing, but lo­cal winds can ex­plain them bet­ter. Wind speed im­pacts ocean tem­per­a­tures by chang­ing the rate of evap­o­ra­tion. Faster wind means more evap­o­ra­tion and cool­ing. Be­tween 1900 and 2012, changes in tem­per­a­tures in Pa­cific Ocean wa­ters off North Amer­ica fol­lowed changes in wind di­rec­tions and ve­loc­ity. Ocean tem­per­a­ture in the re­gion saw a steep rise be­tween 1920 and 1940, though the in­crease in green­house gases dur­ing the pe­riod were neg­li­gi­ble. PNAS, Septem­ber 22

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