The major factors that are leading to enhanced coastal erosion are related to the decrease in sea ice extent, which then allows greater waves and more fetch to actively erode the coast. So in fact, the sea ice cover is very important for protecting the coastal lands. And as that is present for less of the year, you're getting more storms and greater waves acting upon these coastal lands, which tend to be rich in ice and permafrost, and they erode very rapidly. So the types of factors you're talking about would be exceedingly minor relative to this important influence of extended wave activity.
On April 27th, 2009. See this statement in context.