1000 Year Ocean Conveyor - Blog of the Long Now

June 15th, 02009 by Alexander Rose - Twitter: @zander    Patrick Wlaters sent in this great tidbit about the oceans "thermohaline currents" driven by salinity and temperature gradients. The ocean conveyor gets it "start" in the Norwegian Sea, where warm water from the Gulf Stream heats the atmosphere in the cold northern latitudes. This loss of heat to the atmosphere makes the water cooler and denser, causing it to sink to the bottom of the ocean. As more warm water is transported north, the cooler water sinks and moves south to make room for the incoming warm water. This cold bottom water flows south of the equator all the way down to Antarctica. Eventually, the cold bottom waters are able to warm and rise to the surface, continuing the conveyor belt that encircles the globe. It takes almost 1,000 years for the conveyor belt to complete one "cycle." This entry was posted on Monday, June 15th, 02009 at 3:00 am and is filed under Long Term Science.

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