"The conclusion relies on a recently developed computer model that shows it is essentially impossible that the glacier could have receded so much, so quickly without the influence of fossil-fuel emissions causing Earth’s atmosphere to warm."
And there it is ......... It's man made because my model says so....
For a less dramatic version of the story , check out the local one
see: .yukon-news.com/business/the-curious-case-of-the-vanishing-river/ 06/22/16
"But as to whether this shift is yet another example of manmade climate change, Kennedy was ambivalent. The Kaskawulsh glacier has been retreating since the end of the Little Ice Age, after all.

“Would this particular event have happened without anthropogenic climate change? Probably,” she said.

“It’s neat to see. It’s really just an interesting natural phenomenon that’s happening right before our eyes, and not very many people get to see something like this.”
Less drama  ,but more honesty.