Radio-echo sounding at Dome C, East Antarctica: A comparison of measured and modeled data


Contact
anna.winter [ at ] awi.de

Abstract

The internal layering architecture of ice sheets, detected with radio-echo sounding (RES), contains clues to past ice-flow dynamics and mass balance. A common way of relating the recorded travel time of RES reflections to depth is by integrating a wave-speed distribution. This results in an increasing absolute error with depth. We present a synchronization of RES-internal layers of different radar systems (Alfred Wegener Institute, Center for Remote Sensing of Ice Sheets, Istituto Nazionale di Geofisica e Vulcanologia, British Antarctic Survey and University of Texas Institute for Geophysics) with ice-core records from the Antarctic deep drill site Dome C. Synthetic radar traces are obtained from measurements of ice-core density and conductivity with a 1D model of Maxwell’s equations. The reflection peaks of the different radar systems’ measurements are shifted by a wigglematching algorithm, so they match the synthetic trace. In this way, we matched pronounced internal reflections in the RES data to conductivity peaks with considerably smaller depth uncertainties, and assigned them with the ice-core age. We examine the differences in shifts and resolution of the different RES data to address the question of their comparability and combined analysis for an extensive age-depth distribution.



Item Type
Conference (Talk)
Authors
Divisions
Primary Division
Programs
Primary Topic
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
EGU General Assembly, 18 Apr 2016 - 22 Apr 2016, Vienna, Austria.
Eprint ID
39459
Cite as
Winter, A. , Eisen, O. , Steinhage, D. , Zirizzotti, A. , Urbini, S. , Cavitte, M. , Blankenship, D. D. and Wolff, E. (2016): Radio-echo sounding at Dome C, East Antarctica: A comparison of measured and modeled data , EGU General Assembly, Vienna, Austria, 18 April 2016 - 22 April 2016 .


Download
[img]
Preview
PDF
Winter_PicoEGU2016.pdf

Download (13MB) | Preview
Cite this document as:

Share

Research Platforms

Campaigns


Actions
Edit Item Edit Item