Hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite
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 interpret...
Published in: | Geochimica et Cosmochimica Acta |
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ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:44726 2023-05-15T17:34:30+02:00 Hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite Lechleitner, Franziska A. Baldini, James U. L. Breitenbach, Sebastian Franz Martin Fohlmeister, Jens Bernd McIntyre, Cameron Goswami, Bedartha Jamieson, Robert A. van der Voort, Tessa S. Prufer, Keith Marwan, Norbert Culleton, Brendan J. Kennett, Douglas J. Asmerom, Yemane Polyak, Victor Eglinton, Timothy I. 2016 https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/44726 https://doi.org/10.1016/j.gca.2016.08.039 eng eng https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/44726 https://doi.org/10.1016/j.gca.2016.08.039 info:eu-repo/semantics/closedAccess Institut für Physik und Astronomie Institut für Geowissenschaften article doc-type:article 2016 ftubpotsdam https://doi.org/10.1016/j.gca.2016.08.039 2022-07-28T20:48:34Z 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 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. Article in Journal/Newspaper North Atlantic University of Potsdam: publish.UP Geochimica et Cosmochimica Acta 194 233 252 |
institution |
Open Polar |
collection |
University of Potsdam: publish.UP |
op_collection_id |
ftubpotsdam |
language |
English |
topic |
Institut für Physik und Astronomie Institut für Geowissenschaften |
spellingShingle |
Institut für Physik und Astronomie Institut für Geowissenschaften Lechleitner, Franziska A. Baldini, James U. L. Breitenbach, Sebastian Franz Martin Fohlmeister, Jens Bernd McIntyre, Cameron Goswami, Bedartha Jamieson, Robert A. van der Voort, Tessa S. Prufer, Keith Marwan, Norbert Culleton, Brendan J. Kennett, Douglas J. Asmerom, Yemane Polyak, Victor Eglinton, Timothy I. Hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite |
topic_facet |
Institut für Physik und Astronomie Institut für Geowissenschaften |
description |
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 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. |
format |
Article in Journal/Newspaper |
author |
Lechleitner, Franziska A. Baldini, James U. L. Breitenbach, Sebastian Franz Martin Fohlmeister, Jens Bernd McIntyre, Cameron Goswami, Bedartha Jamieson, Robert A. van der Voort, Tessa S. Prufer, Keith Marwan, Norbert Culleton, Brendan J. Kennett, Douglas J. Asmerom, Yemane Polyak, Victor Eglinton, Timothy I. |
author_facet |
Lechleitner, Franziska A. Baldini, James U. L. Breitenbach, Sebastian Franz Martin Fohlmeister, Jens Bernd McIntyre, Cameron Goswami, Bedartha Jamieson, Robert A. van der Voort, Tessa S. Prufer, Keith Marwan, Norbert Culleton, Brendan J. Kennett, Douglas J. Asmerom, Yemane Polyak, Victor Eglinton, Timothy I. |
author_sort |
Lechleitner, Franziska A. |
title |
Hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite |
title_short |
Hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite |
title_full |
Hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite |
title_fullStr |
Hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite |
title_full_unstemmed |
Hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite |
title_sort |
hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite |
publishDate |
2016 |
url |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/44726 https://doi.org/10.1016/j.gca.2016.08.039 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/44726 https://doi.org/10.1016/j.gca.2016.08.039 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.gca.2016.08.039 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
194 |
container_start_page |
233 |
op_container_end_page |
252 |
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1766133358540095488 |