Ponds in the Arctic tundra are shrinking and slowly disappearing, according to a new study, Science Daily reported. More than 2,800 Arctic tundra ponds in the northern region of Alaska's Barrow Peninsula were analyzed using historical photos and satellite images taken between 1948 and 2010. Over the 62-year period, the researchers found that the number of ponds in the region had decreased by about 17 percent, while pond size had shrunk by an average of one-third.