The 8.2‐ka BP event in north‐eastern North America: first combined oxygen and hydrogen isotopic data from peat in Newfoundland
ABSTRACT Finding direct evidence for atmospheric circulation change in terrestrial records of Holocene climate variability remains a fundamental challenge. Here we present the first combined stable oxygen and hydrogen isotopic palaeorecord from a peatland core in Newfoundland, Canada. Sphagnum cellu...
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crwiley:10.1002/jqs.2870 2024-06-02T08:10:39+00:00 The 8.2‐ka BP event in north‐eastern North America: first combined oxygen and hydrogen isotopic data from peat in Newfoundland Daley, T. J. Barber, K. E. Hughes, P. D. M. Loader, N. J. Leuenberger, M. Street‐Perrott, F. A. NERC RAPID NERC PRECIP 2016 http://dx.doi.org/10.1002/jqs.2870 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.2870 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.2870 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Journal of Quaternary Science volume 31, issue 4, page 416-425 ISSN 0267-8179 1099-1417 journal-article 2016 crwiley https://doi.org/10.1002/jqs.2870 2024-05-03T10:35:24Z ABSTRACT Finding direct evidence for atmospheric circulation change in terrestrial records of Holocene climate variability remains a fundamental challenge. Here we present the first combined stable oxygen and hydrogen isotopic palaeorecord from a peatland core in Newfoundland, Canada. Sphagnum cellulose samples were isolated from a core from Nordan's Pond Bog, Newfoundland, and analysed for δD values. Combined with existing δ 18 O data, the resulting δD/δ 18 O bi‐plot correlates directly with existing measurements of the modern (late 20th century) isotopic composition of precipitation from GNIP stations in Nova Scotia and Labrador, implying a close relationship between the estimated isotopic composition of source water used by the mosses and that of the source precipitation. We use the relative variations between the two isotope records to test the hypothesis that atmospheric circulation changed in the millennium following the 8.2‐ka BP climate event. The data reveal a secondary complex isotopic response ∼200 years (8250–8050 a BP) after a primary oxygen isotopic event that is widespread in the north Atlantic region. This secondary event is characterized by a divergence in oxygen and hydrogen isotope records that can most plausibly be explained by the augmentation of precipitation moisture from a more distant and more continental vapour source. Article in Journal/Newspaper Newfoundland North Atlantic Wiley Online Library Canada Newfoundland Journal of Quaternary Science 31 4 416 425 |
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Open Polar |
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Wiley Online Library |
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crwiley |
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English |
description |
ABSTRACT Finding direct evidence for atmospheric circulation change in terrestrial records of Holocene climate variability remains a fundamental challenge. Here we present the first combined stable oxygen and hydrogen isotopic palaeorecord from a peatland core in Newfoundland, Canada. Sphagnum cellulose samples were isolated from a core from Nordan's Pond Bog, Newfoundland, and analysed for δD values. Combined with existing δ 18 O data, the resulting δD/δ 18 O bi‐plot correlates directly with existing measurements of the modern (late 20th century) isotopic composition of precipitation from GNIP stations in Nova Scotia and Labrador, implying a close relationship between the estimated isotopic composition of source water used by the mosses and that of the source precipitation. We use the relative variations between the two isotope records to test the hypothesis that atmospheric circulation changed in the millennium following the 8.2‐ka BP climate event. The data reveal a secondary complex isotopic response ∼200 years (8250–8050 a BP) after a primary oxygen isotopic event that is widespread in the north Atlantic region. This secondary event is characterized by a divergence in oxygen and hydrogen isotope records that can most plausibly be explained by the augmentation of precipitation moisture from a more distant and more continental vapour source. |
author2 |
NERC RAPID NERC PRECIP |
format |
Article in Journal/Newspaper |
author |
Daley, T. J. Barber, K. E. Hughes, P. D. M. Loader, N. J. Leuenberger, M. Street‐Perrott, F. A. |
spellingShingle |
Daley, T. J. Barber, K. E. Hughes, P. D. M. Loader, N. J. Leuenberger, M. Street‐Perrott, F. A. The 8.2‐ka BP event in north‐eastern North America: first combined oxygen and hydrogen isotopic data from peat in Newfoundland |
author_facet |
Daley, T. J. Barber, K. E. Hughes, P. D. M. Loader, N. J. Leuenberger, M. Street‐Perrott, F. A. |
author_sort |
Daley, T. J. |
title |
The 8.2‐ka BP event in north‐eastern North America: first combined oxygen and hydrogen isotopic data from peat in Newfoundland |
title_short |
The 8.2‐ka BP event in north‐eastern North America: first combined oxygen and hydrogen isotopic data from peat in Newfoundland |
title_full |
The 8.2‐ka BP event in north‐eastern North America: first combined oxygen and hydrogen isotopic data from peat in Newfoundland |
title_fullStr |
The 8.2‐ka BP event in north‐eastern North America: first combined oxygen and hydrogen isotopic data from peat in Newfoundland |
title_full_unstemmed |
The 8.2‐ka BP event in north‐eastern North America: first combined oxygen and hydrogen isotopic data from peat in Newfoundland |
title_sort |
8.2‐ka bp event in north‐eastern north america: first combined oxygen and hydrogen isotopic data from peat in newfoundland |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1002/jqs.2870 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.2870 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.2870 |
geographic |
Canada Newfoundland |
geographic_facet |
Canada Newfoundland |
genre |
Newfoundland North Atlantic |
genre_facet |
Newfoundland North Atlantic |
op_source |
Journal of Quaternary Science volume 31, issue 4, page 416-425 ISSN 0267-8179 1099-1417 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/jqs.2870 |
container_title |
Journal of Quaternary Science |
container_volume |
31 |
container_issue |
4 |
container_start_page |
416 |
op_container_end_page |
425 |
_version_ |
1800756559322546176 |