Near the surface of the ocean, global warming is creating increasingly distinct layers of warm water that stifle seawater circulations critical for regulating climate and sustaining marine life. The sheets of warm water block flows of heat, carbon, oxygen and nutrients within the water column, and between the oceans and atmosphere.

A new study shows more heat is building up in the upper 600 feet of the ocean than deeper down. That increasingly distinct warm layer on the surface can intensify tropical storms, disrupt fisheries, interfere with the ocean absorption of carbon and deplete oxygen, Michael Mann, a climate scientist at Penn State, said. 

Read more at InsideClimate News.