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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Online Access: | http://eprints.gla.ac.uk/136587/ http://eprints.gla.ac.uk/136587/1/136587.pdf |
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ftuglasgow:oai:eprints.gla.ac.uk:136587 2023-05-15T17:33:55+02:00 Hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite Lechleitner, Franziska A. Baldini, James U.L. Breitenbach, Sebastian F.M. Fohlmeister, Jens 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. 2016-12 text http://eprints.gla.ac.uk/136587/ http://eprints.gla.ac.uk/136587/1/136587.pdf en eng Elsevier http://eprints.gla.ac.uk/136587/1/136587.pdf Lechleitner, F. A. et al. (2016) Hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite. Geochimica et Cosmochimica Acta <http://eprints.gla.ac.uk/view/journal_volume/Geochimica_et_Cosmochimica_Acta.html>, 194, 233 - 252. (doi:10.1016/j.gca.2016.08.039 <http://dx.doi.org/10.1016/j.gca.2016.08.039>) cc_by_nc_nd_4 CC-BY-NC-ND Articles PeerReviewed 2016 ftuglasgow https://doi.org/10.1016/j.gca.2016.08.039 2020-01-10T01:19:41Z 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 (δ13C) and U/Ca measurements, as well as radiocarbon (14C) 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, δ13C, and U/Ca indicates that karst processes are a common driver of all three parameters, suggesting possible use of δ13C 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. Article in Journal/Newspaper North Atlantic University of Glasgow: Enlighten - Publications Geochimica et Cosmochimica Acta 194 233 252 |
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Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
English |
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 (δ13C) and U/Ca measurements, as well as radiocarbon (14C) 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, δ13C, and U/Ca indicates that karst processes are a common driver of all three parameters, suggesting possible use of δ13C 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. |
format |
Article in Journal/Newspaper |
author |
Lechleitner, Franziska A. Baldini, James U.L. Breitenbach, Sebastian F.M. Fohlmeister, Jens 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. |
spellingShingle |
Lechleitner, Franziska A. Baldini, James U.L. Breitenbach, Sebastian F.M. Fohlmeister, Jens 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 |
author_facet |
Lechleitner, Franziska A. Baldini, James U.L. Breitenbach, Sebastian F.M. Fohlmeister, Jens 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 |
publisher |
Elsevier |
publishDate |
2016 |
url |
http://eprints.gla.ac.uk/136587/ http://eprints.gla.ac.uk/136587/1/136587.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://eprints.gla.ac.uk/136587/1/136587.pdf Lechleitner, F. A. et al. (2016) Hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite. Geochimica et Cosmochimica Acta <http://eprints.gla.ac.uk/view/journal_volume/Geochimica_et_Cosmochimica_Acta.html>, 194, 233 - 252. (doi:10.1016/j.gca.2016.08.039 <http://dx.doi.org/10.1016/j.gca.2016.08.039>) |
op_rights |
cc_by_nc_nd_4 |
op_rightsnorm |
CC-BY-NC-ND |
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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1766132576557203456 |