dead: Nonsense
Gotta agree with dead. You can't seriously use the word unequivocally while putting forth some theory for the southern hemisphere which is not melting overall. Obviously that would get rid of the unequivocally. Also why use climate change, why not global warming? Climate change is natural. I agree some global warming is due to man, but we don't know how much. Cooling and warming are also natural and ongoing.
The phrase “melting of the polar ice cap” refers to what’s happening in the Arctic. “melting of the polar ice caps” would cover both ends. I was indicating that the use of “unequivocally” is pretty much ridiculous. The most likely main cause, clearly, but the linkage is not unequivocal and never will be.