evidence: The South Pole is warming at a rate nearly three times faster than the global average, scientists have discovered. And much of that warming is linked to climate cycles happening thousands of miles away in the tropics. [...] The study, led by Kyle Clem of Victoria University of Wellington in New Zealand, examined surface air temperatures at the world's southernmost weather observatory: the Amundsen-Scott station, located almost directly on top of the geographic South Pole. It's a lonely, snow-covered outpost in the middle of the Antarctic continent, in a place where winter temperatures can drop below minus 100 degrees Fahrenheit. The researchers found that temperatures there have been rising by about a degree Fahrenheit each decade since the start of the 1990s. That's about three times faster than the global average.