A New Idea to Save the Climate? Dam the Bering Strait.

  If the AMOC is strong, then closing the strait would cause less fresh water to flow out of the Arctic Ocean and into the Atlantic, they found. That would help keep the North Atlantic salty and the AMOC stable. But if the AMOC is already near collapse, then closing the strait would have the opposite effect, destabilizing the AMOC further. The timing, in other words, is key.