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| Titel |
Imaging the structure of cave ice by ground-penetrating radar |
| VerfasserIn |
Helmut Hausmann, M. Behm |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 5, no. 2 ; Nr. 5, no. 2 (2011-04-13), S.329-340 |
| Datensatznummer |
250002426
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| Publikation (Nr.) |
 copernicus.org/tc-5-329-2011.pdf |
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| Schlagwörter |
Höhle, Eishöhle, Höhleneis, Bodenradar, Ground-Penetrating-Radar (GPR), Geophysik, Geodäsie, Nördliche Kalkalpen |
| Geograf. Schlagwort |
Österreich, Oberösterreich, Gmunden (Bezirk), Mammuthöhle, Salzburg, Sankt Johann im Pongau (Bezirk), Steiermark, Leoben (Bezirk), Gams bei Hieflau, Beilsteineishöhle, Eisriesenwelt, Tennengebirge, Dachsteingebiet |
| Blattnummer |
94 [Hallein], 101 [Eisenerz] |
| Blattnummer (UTM) |
3216 [Bischofshofen], 3216 [Bischofshofen], 4209 [Hieflau] |
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| Zusammenfassung |
Several caves in high elevated alpine regions host up to several meters
thick ice. The age of the ice may exceed some hundreds or thousands of
years. However, structure, formation and development of the ice are not
fully understood and are subject to relatively recent investigation. The
application of ground-penetrating radar (GPR) enables to determine
thickness, volume, basal and internal structure of the ice and provides as
such important constraints for related studies. We present results from four
caves located in the Northern Calcareous Alps of Austria.
We show that the ice is far from being uniform. The base has variable
reflection signatures, which is related to the type and size of underlying
debris. The internal structure of the cave ice is characterized by banded
reflections. These reflection signatures are interpreted as thin layers of
sediments and might help to understand the ice formation by representing
isochrones. Overall, the relatively low electromagnetic wave speed suggests
that the ice is temperate, and that a liquid water content of about 2%
is distributed homogenously in the ice. |
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