Michael Krautblatter and Daniel Draebing had their most recent manuscript accepted for publication in the Journal of Geophysical Research - Earth Surface.
By carefully measuring changes in the speed of sound waves travelling through a partially-frozen rock slope, Michael and Daniel were able to identify the boundary between frozen and unfrozen bedrock to a depth of more than 10 m. They made repeated measurements over the period of a year, and were able to observe a migration of the permafrost zone within the ridge, located beneath the Rothorn (3259 m) in the central Swiss Alps. The online edition of the article should be available in a few months. The pre-press version of the article is available here.