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Summary of Proposal HYD2743

TitleUsage of TerraSAR-X images to characterize changes in shallow subsurface structures on Devon Ice Cap, Canada
Investigator Fernandes, Luisa - University of Alberta, Earth and Atmospheric Sciences
Team Member
PhD Sharp, Martin - University of Alberta, Earth and Atmospheric Sciences
SummaryThe goal of the proposed research is to use high-resolution data from TerraSAR-X (acquired in StripMap mode and dual polarization) to characterize changes in shallow subsurface structures and determine the physical characteristics of snow/ice on the Devon Ice Cap. We propose to use data collected since before the start of the melt season (April to early July) and after the end of the melt season (August to October) as we expect the firn to be frozen at those times, which will maximize the radar penetration depth. We will focus on the years 2014, 2015 and 2016. To complete these objectives, the following methods will be used: I. The Normalized Kennaugh Elements (NKE), a decomposition technique, will be used to separate backscattering strength from polarimetric information, which the first element always reflects the total intensity and the others can be divided into absorption, diatennuation and retardance. II. Use of (a) Ground-penetrating radar (GPR) survey data collected during May of 2015; (b) data from firn cores acquired in the same period of 2015; III. Analyze daily climate data from the ERA-Interim reanalysis to evaluate the likely timing and spatial distribution of summer melt across the ice cap for comparison with patterns of firn structure change.

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DLR 2004-2016