Fibre-optic experiment produces the most detailed temperature record from the Greenland Ice Sheet

Our fibre-optic experiment on Store Glacier have produced the most detailed record of temperature from the surface of the Greenland Ice Sheet to its bed, more than 1000 metres below. The result significantly improves our understanding of ice sheet thermodynamics. Compared to previous studies, which used discrete temperature sensors – often located tens or even[…]

Borehole optical televiewing shows deep mixed-mode crevasses at Store Glacier

RESPONDER borehole observations at Store Glacier have identified deep mixed-mode crevasses that penetrate far deeper into the ice than model predictions. For decades, crevasse depths have been estimated by calculating opening and closure rates theoretically. These simple calculations predicted crevasses would penetrate only some tens of metres below the surface of a glacier, but the[…]

Terrestrial radar interferometer captures >8000 calving events at Store Glacier

RESPONDER has produced the most detailed record of calving record from a marine-terminating glacier in Greenland. Using a terrestrial radar interferometer, our team recorded hundreds of calving events on a daily basis at Store Glacier and a total of 8,026 separate events. The icebergs that discharged from Store Glacier ranged from boulder sized (<1,000 cubic[…]

Lake drainage paper and media coverage

A new paper from the RESPONDER team led by PhD student Tom Chudley has been published in the Proceedings of the National Academy of Sciences. In it, we present in situ records of a rapidly draining supraglacial lake in a fast-flowing sector of the Greenland Ice Sheet. Despite supraglacial lake drainage influencing ice sheet dynamics[…]

Radar Experiments 2019

Sean Peters, Eliza Dawson, and Mickey MacKie from Stanford University deployed a number of different radar systems on Store Glacier. Sean experimented with passive radar using the Sun as a radio source for bed echo detection. Mickey, Sean, and Eliza tested a bistatic radar system developed by Nicole Bienert and Sean Peters during the 2018[…]

Cryoegg before the attempted deployment in the borehole

Deploying the Cryoegg

Here’s an update on how Cryoegg performed during the field season. We deployed it in the borehole at Store Glacier, but regrettably it was too large to reach the bed. The borehole is narrowest in the middle of the glacier where the ice is coolest, so this was where it got stuck, roughly 400m below[…]