Videos speak louder than words.

Heres a rather novel video I came across by the Extreme Ice Survey. It clearly demonstrates the rate that some of our glaciers around the world are retreating. This video shows the mass balance changes of of Mendenhall glacier near Juneau, Alaska between 2007 and 2008 (in only one year!!).

It should be noted with reference to this that rates of retreat and advance are highly complex and will vary between each individual glacier. Also, this rate would need to be compared to paleaoclimatic reconstructions at Mendenhall to assess the significant of this observed retreat. Still, I think it is a very novel way of showing the dynamics of glacial environments. 350 days in the life of a glacier...enjoy!

'Preventing dangerous climate change is a great investment. It will cost between one and two percent of GDP, and the benefits will be between 10 and 20 percent. That’s a return of 10 to 1—attractive even to a venture capitalist' (Geoffrey Heal)