Manmade climate change alone doesn't explain the dramatic loss of sea ice in the Arctic. Research suggests natural climate fluctuations, including El Niños and La Niñas patterns, account for 40 to 50 percent of sea ice loss in the Arctic.

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Manmade climate change alone doesn't explain the dramatic loss of sea ice in the Arctic. Research suggests natural climate fluctuations, including El Niños and La Niñas patterns, account for 40 to 50 percent of sea ice loss in the Arctic.