In the course of researching last week’s video on Richard Alley and ice cores, I came across this short piece which had information about how snow at shallow depths, before it hardens into ice, is read by scientists.
There’s footage of Jeff Severinghaus, whose work has been discussed several times in climate crock videos, one of the world’s leading experts on paleo-climate, with whom I’ve consulted on issues related to interglacial timing.