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Climate Variability & Change, Water & Energy Cycles

Increases in surface melt rates along Greenland Ice Sheet margins has accelerated melt water production, consequently resulting in increases in melt water infiltration, which has a significant impact on ice sheet flow behavior. The relationship relating summer melt water accumulation into numerous lakes that span several square kilometers and drain rapidly through a network of englacial channels or moulins has been theoretically established, yet the controls on the spatial and temporal distributions of these supra-glacial lake features has not been well determined. This proposal seeks to use both ICESat laser and CryoSAT-2 radar altimeter data to characterize surface topographic structure and investigate the influence of basal structure and condition on surface topography to isolate primary drivers for lake distributions. This will be accomplished through spectra analysis of altimeter data, modeling of basal thermal regime, and derivation of a regionally constrained, high resolution basal topography estimate using airborne coherent ice penetrating radar data derived from the CRESIS data archive over the Jakobshavn region as well as mapping of lake features from a ten year archive of high resolution LandSAT data. The use of internet-based distributed services provides incredible opportunities for involving the broader public in science endeavors. Social networking services (Facebook, MySpace, etc.) are well poised to assist in the acquisition of useful glaciological information from large archives of satellite data acquired over large ice masses such as Antarctica and Greenland. I will implement a pilot collective intelligence outreach program that solicits online users of Facebook to map out supra-glacial lake boundaries over the proposed study region, based on an archive of acquired high resolution Landsat imagery. This program will serve as both an educational/instructional construct for course content enhancement, and will enable reaching a large swath of youth through an existing structure heavily utilized by technology savvy demographics.

Project PI: Derrick Lampkin/Pennsylvania State University

Geography Department Room 215 Walker Building State College, PA 16802

Phone: (814) 865-2493

Email: djl22@psu.edu

http://www.geog.psu.edu/people/lampkin/

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Started: Sep 27, 2010

Last Activity: Jan 04, 2011

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