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SUMMARY:EESS talk on "Greenland subglacial hydrology in conduits and into 
 fjords"
DTSTART:20160308T121500
DTEND:20160308T131500
DTSTAMP:20260430T165948Z
UID:74ed321bad4a258396e7595ac13bf0e94e734e1c780ce497759ac533
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Ken Mankoff\, research associate\, Department of Geoscience
 s\, Pennsylvania State University\, USA \nAbstract:\nIce sheets and glacie
 rs are changing rapidly as the climate warms. Unfortunately\, the boundari
 es that primarily control the system – the glacier bed and the ice/ocean
  margin – are difficult to observe. In this talk I present observations 
 of a glacier bed collected in a subglacial conduit and of the ice/ocean bo
 undary at the calving edge of a Greenland glacier. To collect data under t
 he glacier we used ~500 CHF of equipment to build a 3D model used in a com
 putational fluid dynamics model. To collect data in the subglacial outflow
  plume at the marine edge we used a remote-controlled Jetski-powered kayak
 . Results from under the glacier show that traditional treatments of rough
 ness (and therefore heat transfer to the glacier bed) may be invalid due t
 o the size of rocks at the glacier bed. Results from the marine edge show 
 that a) most of the meltwater in the fjord comes from the ice front outsid
 e the plume region and b) melt rate cannot be diagnosed using only traditi
 onal oceanographic measurements.Short biography:\nDr Mankoff is a research
  associate at the Pennsylvania State University Department of Geosciences 
 where he studies ice sheet hydrology\, ice/ocean interactions\, and ice-pr
 oximal oceanography using a combination of observational fieldwork\, low-c
 ost robotic vehicles\, remote sensing and novel sensors and algorithms.\nH
 is research spans the path of a drop of water from when it melts on the su
 rface (or at the base) of the ice sheet\, flows through and under the ice 
 sheet\, and is exhausted into a Greenland fjord or under an Antarctic ice 
 shelf. The water is then one half of the ice/ocean boundary\, and this fre
 shwater flux is increasing in the warming climate. Further downstream\, th
 e meltwater modifies fjord properties and coastal seas\, changing oceanic 
 and ice conditions.
LOCATION:GR C0 01 http://plan.epfl.ch/?room=GR%20C0%2001
STATUS:CONFIRMED
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