Stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern China surrounding the "8.2 ka event"
The prominent "8.2 ka event" was well documented in the Greenland ice cores. It remains unclear, however, about its duration, structure and forcing mechanism at low- to mid-latitude regions. Here we use the physical and geochemical data of stalagmites from the Nuanhe Cave in Liaoning Provi...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:a65e0f5efd86445b99919cbcd6d54e73 2023-05-15T16:29:44+02:00 Stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern China surrounding the "8.2 ka event" J. Y. Wu Y. J. Wang H. Cheng X. G. Kong D. B. Liu 2012-10-01 https://doi.org/10.5194/cp-8-1497-2012 http://www.clim-past.net/8/1497/2012/cp-8-1497-2012.pdf https://doaj.org/article/a65e0f5efd86445b99919cbcd6d54e73 en eng Copernicus Publications doi:10.5194/cp-8-1497-2012 1814-9324 1814-9332 http://www.clim-past.net/8/1497/2012/cp-8-1497-2012.pdf https://doaj.org/article/a65e0f5efd86445b99919cbcd6d54e73 undefined Climate of the Past, Vol 8, Iss 5, Pp 1497-1507 (2012) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2012 fttriple https://doi.org/10.5194/cp-8-1497-2012 2023-01-22T19:18:56Z The prominent "8.2 ka event" was well documented in the Greenland ice cores. It remains unclear, however, about its duration, structure and forcing mechanism at low- to mid-latitude regions. Here we use the physical and geochemical data of stalagmites from the Nuanhe Cave in Liaoning Province, northeastern China, to reconstruct a detailed history of East Asian monsoons covering the entire duration of the event. High-resolution chronologies of two contemporaneous stalagmites, each consisting of at least 770 yr annual growth bands, were established by calibrating and anchoring the floating band-counting ages against five high-precision 230Th dates. Two oxygen isotope profiles replicate each other on annual-decadal timescales despite their difference in growth rates, indicating that the δ18O variability has a climatic origin largely associated with changes in the rainfall δ18O from the West Pacific during summer season. A signal from the "8.2ka event" was faint in our δ18O records, not as significant as Indian monsoon dominated stalagmite δ18O records from Qunf in Oman and Dongge in Southern China. However, our δ13C and Ba/Ca profiles, as indicators of local environmental changes, provide strong support for a climate reversal centred at 8.2 ka BP, which is likely controlled by winter monsoon circulations via the westerly winds associated with North Atlantic climate. Therefore, we concluded that the winter- and summer-Asian monsoons responded independently to the high northern latitude climate. Article in Journal/Newspaper Greenland Greenland ice cores North Atlantic Unknown Greenland Indian Pacific Climate of the Past 8 5 1497 1507 |
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fttriple |
language |
English |
topic |
envir geo |
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envir geo J. Y. Wu Y. J. Wang H. Cheng X. G. Kong D. B. Liu Stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern China surrounding the "8.2 ka event" |
topic_facet |
envir geo |
description |
The prominent "8.2 ka event" was well documented in the Greenland ice cores. It remains unclear, however, about its duration, structure and forcing mechanism at low- to mid-latitude regions. Here we use the physical and geochemical data of stalagmites from the Nuanhe Cave in Liaoning Province, northeastern China, to reconstruct a detailed history of East Asian monsoons covering the entire duration of the event. High-resolution chronologies of two contemporaneous stalagmites, each consisting of at least 770 yr annual growth bands, were established by calibrating and anchoring the floating band-counting ages against five high-precision 230Th dates. Two oxygen isotope profiles replicate each other on annual-decadal timescales despite their difference in growth rates, indicating that the δ18O variability has a climatic origin largely associated with changes in the rainfall δ18O from the West Pacific during summer season. A signal from the "8.2ka event" was faint in our δ18O records, not as significant as Indian monsoon dominated stalagmite δ18O records from Qunf in Oman and Dongge in Southern China. However, our δ13C and Ba/Ca profiles, as indicators of local environmental changes, provide strong support for a climate reversal centred at 8.2 ka BP, which is likely controlled by winter monsoon circulations via the westerly winds associated with North Atlantic climate. Therefore, we concluded that the winter- and summer-Asian monsoons responded independently to the high northern latitude climate. |
format |
Article in Journal/Newspaper |
author |
J. Y. Wu Y. J. Wang H. Cheng X. G. Kong D. B. Liu |
author_facet |
J. Y. Wu Y. J. Wang H. Cheng X. G. Kong D. B. Liu |
author_sort |
J. Y. Wu |
title |
Stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern China surrounding the "8.2 ka event" |
title_short |
Stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern China surrounding the "8.2 ka event" |
title_full |
Stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern China surrounding the "8.2 ka event" |
title_fullStr |
Stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern China surrounding the "8.2 ka event" |
title_full_unstemmed |
Stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern China surrounding the "8.2 ka event" |
title_sort |
stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern china surrounding the "8.2 ka event" |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/cp-8-1497-2012 http://www.clim-past.net/8/1497/2012/cp-8-1497-2012.pdf https://doaj.org/article/a65e0f5efd86445b99919cbcd6d54e73 |
geographic |
Greenland Indian Pacific |
geographic_facet |
Greenland Indian Pacific |
genre |
Greenland Greenland ice cores North Atlantic |
genre_facet |
Greenland Greenland ice cores North Atlantic |
op_source |
Climate of the Past, Vol 8, Iss 5, Pp 1497-1507 (2012) |
op_relation |
doi:10.5194/cp-8-1497-2012 1814-9324 1814-9332 http://www.clim-past.net/8/1497/2012/cp-8-1497-2012.pdf https://doaj.org/article/a65e0f5efd86445b99919cbcd6d54e73 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-8-1497-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
5 |
container_start_page |
1497 |
op_container_end_page |
1507 |
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1766019445489139712 |