Radiocarbon calibration beyond the dendrochronology range
The radiocarbon timescale has been calibrated by dendrochronology back to 11.8 ka cal BP, and extended to 14.8 ka cal BP using laminated marine sediments from the Cariaco Basin. Extension to nearly 23.5 ka cal BP is based on comparison between 14C and U-Th ages of corals. Recently, attempts to furth...
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Department of Geosciences, University of Arizona
2000
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ftoceanrep:oai:oceanrep.geomar.de:2029 2024-09-30T14:39:26+00:00 Radiocarbon calibration beyond the dendrochronology range Stein, Mordechai Goldstein, Steven L. Schramm, Alexandra 2000 text https://oceanrep.geomar.de/id/eprint/2029/ https://oceanrep.geomar.de/id/eprint/2029/1/Stein.pdf https://doi.org/10.1017/S0033822200030344 en eng Department of Geosciences, University of Arizona https://oceanrep.geomar.de/id/eprint/2029/1/Stein.pdf Stein, M., Goldstein, S. L. and Schramm, A. (2000) Radiocarbon calibration beyond the dendrochronology range. Open Access Radiocarbon, 42 (3). pp. 415-422. DOI 10.1017/S0033822200030344 <https://doi.org/10.1017/S0033822200030344>. doi:10.1017/S0033822200030344 info:eu-repo/semantics/openAccess Article PeerReviewed 2000 ftoceanrep https://doi.org/10.1017/S0033822200030344 2024-09-04T05:04:40Z The radiocarbon timescale has been calibrated by dendrochronology back to 11.8 ka cal BP, and extended to 14.8 ka cal BP using laminated marine sediments from the Cariaco Basin. Extension to nearly 23.5 ka cal BP is based on comparison between 14C and U-Th ages of corals. Recently, attempts to further extend the calibration curve to >40 kyr are based on laminated sediments from Lake Suigetsu, Japan, foraminifera in North Atlantic sediments, South African cave deposits, tufa from Spain, and stalagmites from the Bahamas. Here we compare these records with a new comparison curve obtained by 234U-230Th ages of aragonite deposited at Lake Lisan (the last Glacial Dead Sea). This comparison reveals broad agreement for the time interval of 20–32 ka cal BP, but the data diverge over other intervals. All records agree that Δ14C values range between ∼250–450‰ at 20–32 ka cal BP. For ages >32 ka cal BP, the Lake Suigetsu data indicate low Δ14C values of less than 200‰ and small shifts. The other records broadly agree that Δ14C values range between ∼250 and 600‰ at 32–39 ka cal BP. At ∼42 ka cal BP, the North Atlantic calibration shows low Δ14C values, while the corals, Lisan aragonites, and the Spanish tufa indicate a large deviations of 700–900‰. This age is slightly younger than recent estimates of the timing of the Laschamp Geomagnetic Event, and are consistent with increased 14C production during this event. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Radiocarbon 42 3 415 422 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The radiocarbon timescale has been calibrated by dendrochronology back to 11.8 ka cal BP, and extended to 14.8 ka cal BP using laminated marine sediments from the Cariaco Basin. Extension to nearly 23.5 ka cal BP is based on comparison between 14C and U-Th ages of corals. Recently, attempts to further extend the calibration curve to >40 kyr are based on laminated sediments from Lake Suigetsu, Japan, foraminifera in North Atlantic sediments, South African cave deposits, tufa from Spain, and stalagmites from the Bahamas. Here we compare these records with a new comparison curve obtained by 234U-230Th ages of aragonite deposited at Lake Lisan (the last Glacial Dead Sea). This comparison reveals broad agreement for the time interval of 20–32 ka cal BP, but the data diverge over other intervals. All records agree that Δ14C values range between ∼250–450‰ at 20–32 ka cal BP. For ages >32 ka cal BP, the Lake Suigetsu data indicate low Δ14C values of less than 200‰ and small shifts. The other records broadly agree that Δ14C values range between ∼250 and 600‰ at 32–39 ka cal BP. At ∼42 ka cal BP, the North Atlantic calibration shows low Δ14C values, while the corals, Lisan aragonites, and the Spanish tufa indicate a large deviations of 700–900‰. This age is slightly younger than recent estimates of the timing of the Laschamp Geomagnetic Event, and are consistent with increased 14C production during this event. |
format |
Article in Journal/Newspaper |
author |
Stein, Mordechai Goldstein, Steven L. Schramm, Alexandra |
spellingShingle |
Stein, Mordechai Goldstein, Steven L. Schramm, Alexandra Radiocarbon calibration beyond the dendrochronology range |
author_facet |
Stein, Mordechai Goldstein, Steven L. Schramm, Alexandra |
author_sort |
Stein, Mordechai |
title |
Radiocarbon calibration beyond the dendrochronology range |
title_short |
Radiocarbon calibration beyond the dendrochronology range |
title_full |
Radiocarbon calibration beyond the dendrochronology range |
title_fullStr |
Radiocarbon calibration beyond the dendrochronology range |
title_full_unstemmed |
Radiocarbon calibration beyond the dendrochronology range |
title_sort |
radiocarbon calibration beyond the dendrochronology range |
publisher |
Department of Geosciences, University of Arizona |
publishDate |
2000 |
url |
https://oceanrep.geomar.de/id/eprint/2029/ https://oceanrep.geomar.de/id/eprint/2029/1/Stein.pdf https://doi.org/10.1017/S0033822200030344 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/2029/1/Stein.pdf Stein, M., Goldstein, S. L. and Schramm, A. (2000) Radiocarbon calibration beyond the dendrochronology range. Open Access Radiocarbon, 42 (3). pp. 415-422. DOI 10.1017/S0033822200030344 <https://doi.org/10.1017/S0033822200030344>. doi:10.1017/S0033822200030344 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/S0033822200030344 |
container_title |
Radiocarbon |
container_volume |
42 |
container_issue |
3 |
container_start_page |
415 |
op_container_end_page |
422 |
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1811642036911079424 |