Research hints at tipping point in the Atlantic’s currents


Via Ars Technica

"The key issue in all of this is the density of water, which drives the cycling of the oceans. Given similar temperatures, salt water is more dense; given similar salt content, cold water will be more dense. These density differences are large enough that if you have a patch of warm, fresh water sitting on top of cold, salty water, the two bodies won't mix very efficiently. The water ends up layered, or stratified."

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