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Buoys used to support scientific instruments at sea are seen in the foreground prior to being loaded onboard the Woods Hole Oceanographic Institution's research vessel Knorr, seen in the background, on Tuesday, Sept. 4, 2012, in Woods Hole, Mass. Knorr is scheduled to depart on Sept. 6 to take part in the Salinity Processes in the Upper Ocean Regional Study (SPURS). The NASA-sponsored expedition will sail to the North Atlantic's saltiest spot to get a detailed, 3-D picture of how salt content fluctuates in the ocean's upper layers and how these variations are related to shifts in rainfall patterns around the planet. Image Credit: NASA/Bill Ingalls
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