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| Titel |
Isotope hydrological studies of the perennial ice deposit of Saarhalle, Mammuthöhle, Dachstein Mts, Austria |
| VerfasserIn |
Z. Kern, I. Fórizs, R. Pavuza, M. Molnár, B. Nagy |
| 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. 1 ; Nr. 5, no. 1 (2011-03-29), S.291-298 |
| Datensatznummer |
250002287
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| Publikation (Nr.) |
 copernicus.org/tc-5-291-2011.pdf |
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| Zusammenfassung |
| A 5.28 m-long ice core was extracted from a major cave ice body in the
Mammuthöhle cave system. The upper ~1.2 m of ice most likely
originate from precipitation fallen before the 1960s (based on <8.5 TU).
Characteristic fluctuations in electrical conductivity were observed in the
cave ice profile, which seem to mirror the fluctuation of karst and surface
water in the water supply of the ice accumulation. The stable isotope
composition does not support the hypothesis that ice layers with low
conductivity are formed by freezing out of water vapour. Isotope
fractionation effects during the freezing process are indicated by the
enrichment of heavy stable isotopes (2H, 18O) in the ice compared
to the potential sources (local precipitation, karst water) and by the
characteristically low d-excess values. In addition, the cave ice water line
shows a slope coefficient of 8.13. A two-component open-system model (i.e. a
depleted component mixed with the freezing water) can adequately explain the
measured isotopic compositions of the Saarhalle cave ice. |
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