Subglacial carbonate deposits as a potential proxy for a glacier's former presence
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Published:2021-01-04
Issue:1
Volume:15
Page:17-30
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ISSN:1994-0424
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Container-title:The Cryosphere
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language:en
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Short-container-title:The Cryosphere
Author:
Lipar MatejORCID, Martín-Pérez Andrea, Tičar JureORCID, Pavšek Miha, Gabrovec MatejORCID, Hrvatin Mauro, Komac Blaž, Zorn MatijaORCID, Zupan Hajna NadjaORCID, Zhao Jian-Xin, Drysdale Russell N., Ferk Mateja
Abstract
Abstract. The retreat of ice shelves and glaciers over the last century provides unequivocal evidence of recent global warming. Glacierets (miniature glaciers) and ice patches are important components of the cryosphere that highlight the global retreat of glaciers, but knowledge of their behaviour prior to the Little Ice Age is lacking. Here, we report the uranium–thorium age of subglacial carbonate deposits from a recently exposed surface previously occupied by the disappearing Triglav Glacier (southeastern European Alps) that may elucidate the glacier's presence throughout the entire Holocene. The ages suggest the deposits' possible preservation since the Last Glacial Maximum and Younger Dryas. These thin deposits, formed by regelation, are easily eroded if exposed during previous Holocene climatic optima. The age data indicate the glacier's present unprecedented level of retreat since the Last Glacial Maximum and the potential of subglacial carbonates as additional proxies to highlight the extraordinary nature of the current global climatic changes.
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Water Science and Technology
Reference115 articles.
1. Aharon, P.: Oxygen, carbon and U-series isotopes of aragonites from Vestfold Hills, Antarctica: Clues to geochemical processes in subglacial environments, Geochim. Cosmochim. Ac., 52, 2321–2331, https://doi.org/10.1016/0016-7037(88)90134-2, 1988. 2. Alley, R. B.: The Younger Dryas cold interval as viewed from central Greenland, Quaternary Sci. Rev., 19, 213–226, https://doi.org/10.1016/s0277-3791(99)00062-1, 2000. 3. Antoniades, D., Francus, P., Pienitz, R., St-Onge, G., and Vincent, W. F.: Holocene dynamics of the Arctic's largest ice shelf, P. Natl. Acad. Sci. USA, 108, 18899–18904, https://doi.org/10.1073/pnas.1106378108, 2011. 4. Bahr, D. B. and Radić, V.: Significant contribution to total mass from very small glaciers, The Cryosphere, 6, 763–770, https://doi.org/10.5194/tc-6-763-2012, 2012. 5. Bajo, P., Hellstrom, J., Frisia, S., Drysdale, R., Black, J., Woodhead, J., Borsato, A., Zanchetta, G., Wallace, M. W., Regattieri, E., and Haese, R.: “Cryptic” diagenesis and its implications for speleothem geochronologies, Quaternary Sci. Rev., 148, 17–28, https://doi.org/10.1016/j.quascirev.2016.06.020, 2016.
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