Factors contributing to the accelerating erosion appear to be a combination of warmer air temperatures and reduced summer ocean ice cover. (dotearth.blogs.nytimes.com)
This acts as what engineers call «negative feedback» and would explain the paradox of more extensive southern ocean ice in a warming world. (climatenewsnetwork.net)
The diagram in the link below shows the predicted times of Arctic ocean ice melt back. (geoengineeringwatch.org)