Discussion can be found here and here.Using only meteorological and glacier observations, and the characteristic decadal response time of glaciers, we demonstrate that observed retreats of individual glaciers represent some of the highest signal-to-noise ratios of climate change yet documented. Therefore, in many places, the centennial-scale retreat of the local glaciers does indeed constitute categorical evidence of climate change.
Using records of glacier length that go back over 400 years, the researchers show that shrinking of mountain glaciers in five continents could almost certainly not have happened if the Earth wasn’t warming up.Here is an interactive map.
The evidence for climate change is usually presented by climate scientists in basic results from which the consequences often must be inferred. But now there can be no disqualification by climate change deniers. The climate change deniers can retreat in cherry picked data in defiance of the overwhelming overall evidence, but now, more and more evidence that can't be overlooked is being presented.
It is happening and we have to do something about it now.