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Underwater view of suspended CTD water sampling rosette.

Underwater view of suspended CTD water sampling rosette.
Underwater view of suspended CTD water sampling rosette.
Underwater view of suspended CTD water sampling rosette.
Underwater view of suspended CTD water sampling rosette.
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257038
Whelan, Sean Patrick
Underwater view of suspended CTD water sampling rosette.
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10/02/2015
graphics/Whelan/G0013196.jpg
Image Of the Day caption:
A scientific instrument called a CTD (conductivity, temperature, depth) is pulled up to the research vessel Nathaniel B. Palmer from deep in the Atlantic Ocean. The 2015 expedition led by Louis St. Laurent of WHOI and Andreas Thurnherr of Lamont-Doherty Earth Observatory investigated a persistent mystery about ocean circulation: How does cold dense water that sinks to great depths eventually gain heat and buoyancy and rise back to the surface to complete the ocean conveyor belt loop? They explored a theory that strong currents flowing along canyons on the flanks of mid-ocean ridge mountains cause turbulence that mixes deep waters to shallower depths.
Photo by Sean Patrick Whelan
© Woods Hole Oceanographic Institution
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