Declining Antarctic sea ice further drives global warming, a little discussed topic. >The discussions of the remarkable September global warming have noted tha

Declining Antarctic sea ice further drives global warming, a little discussed topic. >The discussions of the remarkable September global warming have noted that much of the warming is associated with an extreme warming anomaly over Antarctica, with the suggestion that this warming is a weather effect that will disappear. While it is true that Antarctic temperature fluctuates greatly from month to month, we note that there is a latent southern Hemisphere polar amplification of warming that has long been dormant, as Southern Hemisphere sea ice cover has been relatively constant for several decades. The recent decline of sea ice area may be an indication that, averaged over weather, Antarctica will become a more important contributor to global temperature change. The above is from James Hansen's latest newsletter. Another one of those pesky self-reinforcing feedback loops.