Dr. Joel Harper presents:"Water Flow at the Bed Of the Greenland Ice Sheet Measured in a Network"
- Thursday, January 19, 2017 from 4:30pm to 5:20pm
- Gaines Hall - view map
On January 19th, 2017 at 4:30pm in Gaines Hall 243, Dr. Joel Harper from the University of Montana will be presenting "Water Flow at the Bed of the Greenland Ice Sheets Measured in a Netword of Boreholes" for the Department of Earth Science Weekly Seminar. Below is an abstract from Dr. Harper about his presentation. We hope you can attend!
As the arctic has warmed, the surface of the Greenland ice sheet has experienced increased surface melt. The meltwater is known to penetrate the ice sheet and gain access to the bed of the ice sheet, where it facilitates sliding motion. Some have argued that future increases in surface melt will therefore cause widespread increases in Greenland’s sliding speed. Others, however, argue that the seasonal development of a highly transmissive subglacial drainage system will modulate the impacts of increased water at the bed. These interpretations have primarily been based on surface observations, where changes in meltwater input are compared to changes in surface velocity. Here we explore the development of Greenland’s subglacial drainage system by focusing on the bed itself. We have drilled 36 boreholes to the bed of the Greenland ice sheet spaced along a 46 km transect. The boreholes have permitted in situ experimentation and collection of multi-year observational time series of subglacial water conditions. We combine our observations with modeling to test conceptualizations of the time evolution of the Greenland ice sheet’s subglacial drainage system. " - Dr. Joel Harper
- Department of Earth Sciences