claim: Antarctic ice fluctuates wildly year to year, and the link to man-made global warming there is not clear, NASA ice expert Walt Meier said.
evidence: Research published in 2009 found that overall the continent had become warmer since the 1950s, a finding consistent with the influence of man-made climate change : We can't pin it down, but it certainly is consistent with the influence of greenhouse gases from fossil fuels, said NASA scientist Drew Shindell, another study co-author.