Melting Glaciers and Sea-Level Rise

The bottom photo here was taken 100 years after the one on the top.

I’m reminded of a conversation I had with a guy who leads a team of researchers at JPL in Pasadena, CA, measuring the strength and solidity of the insides of glaciers.  He told me, “We’ve been able to measure the exterior of glaciers for decades. i.e., their height, width, and depth.  And yes, from that, it’s possible to get some information about the rate at which they’re melting.  But how solid are they beneath their surfaces?  Some melt faster from the inside out, rather than from the outside in, and that’s extremely valuable data foe those trying to predict sea-level rise with any real accuracy.”