For that matter, though, I recall reading that the claimed reduction in ice may have been an observational error as well.
Starting with the assumption that there is a problem, especially when the mid and early 1800s saw sailing ships exploring for and finding a potentially viable northwest passage, seems to be the product of the assumption that ice packs are not within historical variations and that the change is somehow affected by or effected by human activity.
I smell the 'consensus' echo chamber at work in an attempt to justify a carbon tax.
Lots of comments to this first article.