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New fresh water in Arctic could shift Gulf Stream

Scientists are monitoring a massive pool of fresh water in the Arctic Ocean that could spill into the Atlantic and potentially alter the key ocean currents that give Western Europe its moderate climate.Full story

Freshwater factor on oceans

  Changing levels of freshwater from the Arctic can dramatically alter ocean currents, and potentially our climate, researchers have found. NBC's Anne Thompson reports.

Ocean currents keep dolphin populations apart

Dolphins in the western Indian Ocean stick with their own kind — not that they can help it. Blame the ocean's currents, a new study suggests. Full story

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Loss of Antarctic ice 'tongue' could impact seas

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