Read here. Per new peer-reviewed study by Genthon et al., it appears that the recent modest warming in Antarctica may likely be due to erroneous readings from a specific type of thermometer.
"Observations of atmospheric temperature made on the Antarctic plateau with thermistors housed in naturally (wind) ventilated radiation shields are shown to be significantly warm biased by solar radiation. High incoming solar flux and high surface albedo result in radiation biases in Gill (multiplate) styled shields that can occasionally exceed 10°C in summer in case of low wind speed...Although stronger and more frequent when incoming solar radiation is high, biases exceeding 8°C are found even when solar is less than 200 Wm−2." [Christophe Genthon, Delphine Six, Vincent Favier, Matthew Lazzara, Linda Keller 2011: Journal of Atmospheric and Oceanic Technology]
Previous peer-reviewed postings.