Sea-ice switches and abrupt climate change

We propose that past abrupt climate changes were probably a result of rapid and extensive variations in sea-ice cover. We explain why this seems a perhaps more likely explanation than a purely thermohaline circulation mechanism. We emphasize that because of the significant influence of sea ice on the climate system, it seems that high priority…

Video: Arctic Sea Ice Minimum Volumes

This entry is part 5 of 24 in the series ClimateState Issue 1

Sea Ice Decline 1979-2012Arctic Sea Ice Volume AnomalyPolar Science Center: Monthly averaged ice volume for September 2012 was 3,400 km3 This value is 72% lower than the mean over this period, 80% lower than the maximum in 1979, and 2.0 standard deviations below the 1979-2011 trend. September ice volume was about 800 km3 less than…