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Brian Hogue (left) and Palmer crew member recover moored profiler.

Brian Hogue (left) and Palmer crew member recover moored profiler.
Brian Hogue (left) and Palmer crew member recover moored profiler.
Brian Hogue (left) and Palmer crew member recover moored profiler.
Brian Hogue (left) and Palmer crew member recover moored profiler.
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257039
Whelan, Sean Patrick
Brian Hogue (left) and Palmer crew member recover moored profiler.
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10/02/2015
graphics/Whelan/G0042656.jpg
Image Of the Day caption:
The world ocean circulates like a conveyor belt, with cold, salty, dense water in the North Atlantic sinking beneath the surface. But one question remains a mystery: How do these waters eventually gain heat (and buoyancy) to rise back to the surface? A 2015 expedition aboard the Nathaniel B. Palmer led by WHOI scientist Louis St. Laurent and Andreas Thurnherr of Lamont-Doherty Earth Observatory explored the idea that strong currents along canyons on the flanks of mid-ocean ridge cause turbulence that mixes deep waters to shallower depths, closing the loop. Here, Brian Hogue, of WHOIs Sub-surface Mooring Operations Group (left) helps recover instruments during the cruise.
Photo by Sean Patrick Whelan
© Woods Hole Oceanographic Institution
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