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Mark Baumgartner and Melissa Patrician working to deploy a CTD off Tioga.

Hunting for Whales' Water

Mark Baumgartner and Melissa Patrician repair a conductivity-temperature-depth (CTD) rosette on the coastal research vessel Tioga. The biologists use the CTD to detect the water properties and nutrients at various depths in the ocean to see how they correlate with the depths to which whales dive. Baumgartner and colleagues are trying to understand the conditions that not only cause whales to dive within an area, but to migrate to the region in the first place. (Photo by Amy Nevala, Woods Hole Oceanographic Institution)


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