Analysis of characteristics of grounded inland ice using the method of phase sensitive radio echo sounding at Kohnen Station, Antarctica


Contact
sonja.schwerdhelm [ at ] gmx.de

Abstract

This work uses the method of Phase Sensitive Radio Echo Sounding (pRES) for investigating different characteristics of the inland ice around Kohnen Station, Antarctica. Measurements were carried out over three seasons, from season 2014/2015 to season 2016/2017. In 2017, stations were added to the original ones and used to perform polarimetric measurements, meaning, investigating the azimuth dependency of the backscatter of the electromagnetic wave, following studies that were performed at Kohnen Station beforehand but using a different device. Normal pRES measurements were analysed concerning the basal melt rate at the cite and the firn densification rate, PpRES measurements were analysed with the aim to assign depth intervals of 15m depth to the dominant backscatter pattern, either anisotropic backscattering or birefringence. The basal melt rates could not be determined, because of a too shallow correlation depth of measurement and remeasurement. Functions for vertical strain rates at five points were calculated. Polarimetric measurements reveal the dominant reflection mechanism per depth interval. A layer, that is found in all samples is located in about 830m depth. It shows anisotropic backscattering as the dominant mechanism and was linked to the transition from the last glacial maximum to Holocene ice.



Item Type
Thesis (Master)
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Divisions
Primary Division
Programs
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Peer revision
Not peer-reviewed
Publication Status
Published
Eprint ID
48261
Cite as
Schwerdhelm, S. M. (2018): Analysis of characteristics of grounded inland ice using the method of phase sensitive radio echo sounding at Kohnen Station, Antarctica Master thesis, University of Bremen.


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