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SUMMARY:Hydrological networks and flow of the Greenland Ice Sheet: Overvie
 w of the RESPONDER project - Poul Christoffersen (University of Cambridge)
DTSTART:20200305T160000Z
DTEND:20200305T170000Z
UID:TALK139297@talks.cam.ac.uk
CONTACT:Frazer Christie
DESCRIPTION:TALK CANCELLED DUE TO INDUSTRIAL ACTION\n\nGlaciers drain ice 
 sheets by transporting ice from the interior to the coast where ice is dis
 charged into the sea as icebergs. In Greenland\, glaciers are flowing fast
 er\, posing a global risk of accelerated sea level rise. In this talk I re
 port outcomes from the interdisciplinary RESPONDER project (www.erc-respon
 der.eu)\, which is investigating hydrological networks and flow of the Gre
 enland ice sheet. In a multi-disciplinary effect\, the team combined geoph
 ysical techniques with high accuracy drone surveys in order to track the p
 athway of surface meltwater\, including its rapid descent to the bed when 
 fractures open and supraglacial lakes drain rapidly. The team also used a 
 hot-water borehole drilling system to gain access to the bed at specific t
 argets\, which included the shore of a rapidly draining lake\, and the dra
 ined lake floor where a hydrological connection continued to supply a sign
 ificant\, but variable amount of surface water directly to the basal drain
 age system. With sensors deployed at the bed and within the ice\, the proj
 ect has gained a better understanding of the basal hydrology and physical 
 conditions that drive the fast flow of Greenland’s marine-terminating gl
 aciers. This understanding is crucial for being able to predict Greenland
 ’s contribution to sea level rise over the coming decades and century.
LOCATION:Scott Polar Research Institute\, main lecture theatre
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