It's possible that even older photographs in the Danish archive could be used in a similar way to provide even more pre-satellite observations of changes to Greenland's ice, as well as more in - depths studies of particular glaciers (climatecentral.org)
The columns hold water melted from particular glaciers in iceland. (coexistent.net)
«The paper is kind of saying, look, this is what this particular glacier is capable of,» said Mike Bentley, a researcher at Durham University in England who co-led the paper. (scientificamerican.com)