Georg Heygster, head of the Physical Analysis of Remote Sensing Images unit at the University of Bremen’s Institute of Environmental Physics, announces a new record Arctic ice minimum today.
Ignoring the fact that they actually report 140,000 square kilometres more ice today than in 2007 (the previous record minimum) because of altered methods, the good Georg raises more questions than he answers. Like any good climate scientist. First (though this could be the AFP reporter):
Arctic ice cover plays a critical role in regulating Earth’s climate by reflecting sunlight and keeping the polar region cool.
QUESTION: At the last minimum, in 2007, how much did global temperature rise due to the reduced ice cover? ANSWER: Global temps did not rise in 2007 — they fell about 0.4°C. Any albedo effect reducing global temperatures is likely to be insignificant. Continue Reading →