Franziska A. Lechleitner, James U. L. Baldini, Sebastian Franz Martin Breitenbach, Jens Bernd Fohlmeister, Cameron McIntyre, Bedartha Goswami, Robert A. Jamieson, Tessa S. van der Voort, Keith Prufer, Norbert Marwan, Brendan J. Culleton, Douglas J. Kennett, Yemane Asmerom, Victor Polyak, Timothy I. Eglinton
- Precisely-dated stalagmites are increasingly important archives for the reconstruction of terrestrial paleoclimate at very high temporal resolution. In-depth understanding of local conditions at the cave site and of the processes driving stalagmite deposition is of paramount importance for interpreting proxy signals incorporated in stalagmite carbonate. Here we present a sub-decadally resolved dead carbon fraction (DCF) record for a stalagmite from Yok Balum Cave (southern Belize). The record is coupled to parallel stable carbon isotope (delta C-13) and U/Ca measurements, as well as radiocarbon (C-14) measurements from soils overlying the cave system. Using a karst carbon cycle model we disentangle the importance of soil and karst processes on stalagmite DCF incorporation, revealing a dominant host rock dissolution control on total DCF. Covariation between DCF, delta C-13, and U/Ca indicates that karst processes are a common driver of all three parameters, suggesting possible use of delta C-13 and trace element ratios to independentlyPrecisely-dated stalagmites are increasingly important archives for the reconstruction of terrestrial paleoclimate at very high temporal resolution. In-depth understanding of local conditions at the cave site and of the processes driving stalagmite deposition is of paramount importance for interpreting proxy signals incorporated in stalagmite carbonate. Here we present a sub-decadally resolved dead carbon fraction (DCF) record for a stalagmite from Yok Balum Cave (southern Belize). The record is coupled to parallel stable carbon isotope (delta C-13) and U/Ca measurements, as well as radiocarbon (C-14) measurements from soils overlying the cave system. Using a karst carbon cycle model we disentangle the importance of soil and karst processes on stalagmite DCF incorporation, revealing a dominant host rock dissolution control on total DCF. Covariation between DCF, delta C-13, and U/Ca indicates that karst processes are a common driver of all three parameters, suggesting possible use of delta C-13 and trace element ratios to independently quantify DCF variability. A statistically significant multi-decadal lag of variable length exists between DCF and reconstructed solar activity, suggesting that solar activity influenced regional precipitation in Mesoamerica over the past 1500 years, but that the relationship was non-static. Although the precise nature of the observed lag is unclear, solar-induced changes in North Atlantic oceanic and atmospheric dynamics may play a role. (C) 2016 Elsevier Ltd. All rights reserved.…
MetadatenVerfasserangaben: | Franziska A. Lechleitner, James U. L. Baldini, Sebastian Franz Martin BreitenbachORCiDGND, Jens Bernd FohlmeisterGND, Cameron McIntyre, Bedartha GoswamiORCiDGND, Robert A. Jamieson, Tessa S. van der Voort, Keith Prufer, Norbert MarwanORCiDGND, Brendan J. Culleton, Douglas J. Kennett, Yemane Asmerom, Victor Polyak, Timothy I. Eglinton |
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DOI: | https://doi.org/10.1016/j.gca.2016.08.039 |
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ISSN: | 0016-7037 |
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ISSN: | 1872-9533 |
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Titel des übergeordneten Werks (Englisch): | Geochimica et cosmochimica acta : journal of the Geochemical Society and the Meteoritical Society |
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Verlag: | Elsevier |
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Verlagsort: | Oxford |
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Publikationstyp: | Wissenschaftlicher Artikel |
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Sprache: | Englisch |
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Jahr der Erstveröffentlichung: | 2016 |
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Erscheinungsjahr: | 2016 |
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Datum der Freischaltung: | 22.03.2020 |
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Freies Schlagwort / Tag: | Hydroclimate; Radiocarbon; Stalagmite; Trace elements; Tropics |
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Band: | 194 |
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Seitenanzahl: | 20 |
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Erste Seite: | 233 |
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Letzte Seite: | 252 |
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Fördernde Institution: | European Research Council [240167]; European Union [691037] |
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Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
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| Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
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Peer Review: | Referiert |
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Name der Einrichtung zum Zeitpunkt der Publikation: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Erd- und Umweltwissenschaften |
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