A series of climate oscillations around 8.2 ka revealed through multi-proxy speleothem records from North China
The 8.2 ka event has been extensively investigated as a remarkable single event but rarely considered as a part of multi-centennial climatic evolution. Here, we present absolutely dated speleothem multi-proxy records spanning 9.0–7.9 ka from Beijing in North China, near the northern limit of the Eas...
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ftdoajarticles:oai:doaj.org/article:011022b144d748378eea80e1d0e56d25 2024-09-09T19:57:40+00:00 A series of climate oscillations around 8.2 ka revealed through multi-proxy speleothem records from North China P. Duan H. Li Z. Ma J. Zhao X. Dong A. Sinha P. Hu H. Zhang Y. Ning G. Zhu H. Cheng 2024-06-01T00:00:00Z https://doi.org/10.5194/cp-20-1401-2024 https://doaj.org/article/011022b144d748378eea80e1d0e56d25 EN eng Copernicus Publications https://cp.copernicus.org/articles/20/1401/2024/cp-20-1401-2024.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-20-1401-2024 1814-9324 1814-9332 https://doaj.org/article/011022b144d748378eea80e1d0e56d25 Climate of the Past, Vol 20, Pp 1401-1414 (2024) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2024 ftdoajarticles https://doi.org/10.5194/cp-20-1401-2024 2024-08-05T17:49:05Z The 8.2 ka event has been extensively investigated as a remarkable single event but rarely considered as a part of multi-centennial climatic evolution. Here, we present absolutely dated speleothem multi-proxy records spanning 9.0–7.9 ka from Beijing in North China, near the northern limit of the East Asian summer monsoon (EASM) and thus sensitive to climate change, to provide evidence of the intensified multi-decadal climatic oscillations since 8.52 ka. Three extreme excursions characterized by inter-decadal consecutive δ 18 O excursions exceeding ±1 σ are identified from 8.52 ka in our speleothem record. The earlier two are characterized by enriched 18 O at ∼8.50 and 8.20 ka, respectively, suggesting a prolonged arid event, which is supported by the positive trend in δ 13 C values, increased trace element ratios, and lower growth rate. Following the 8.2 ka event, an excessive rebound immediately emerges in our δ 18 O and trace element records but moderate in the δ 13 C, probably suggesting pluvial conditions and nonlinear response of the local ecosystem. Following two similar severe droughts at 8.50 and 8.20 ka, the different behavior of δ 13 C suggests the recovering degree of resilient ecosystem responding to different rebounded rainfall intensity. A comparison with other high-resolution records suggests that the two droughts–one pluvial pattern between 8.52 and 8.0 ka is of global significance instead of being a regional phenomenon, and is causally linked to the slowdown and acceleration of the Atlantic Meridional Overturning Circulation that was further dominated by the freshwater injections in the North Atlantic. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Climate of the Past 20 6 1401 1414 |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 P. Duan H. Li Z. Ma J. Zhao X. Dong A. Sinha P. Hu H. Zhang Y. Ning G. Zhu H. Cheng A series of climate oscillations around 8.2 ka revealed through multi-proxy speleothem records from North China |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The 8.2 ka event has been extensively investigated as a remarkable single event but rarely considered as a part of multi-centennial climatic evolution. Here, we present absolutely dated speleothem multi-proxy records spanning 9.0–7.9 ka from Beijing in North China, near the northern limit of the East Asian summer monsoon (EASM) and thus sensitive to climate change, to provide evidence of the intensified multi-decadal climatic oscillations since 8.52 ka. Three extreme excursions characterized by inter-decadal consecutive δ 18 O excursions exceeding ±1 σ are identified from 8.52 ka in our speleothem record. The earlier two are characterized by enriched 18 O at ∼8.50 and 8.20 ka, respectively, suggesting a prolonged arid event, which is supported by the positive trend in δ 13 C values, increased trace element ratios, and lower growth rate. Following the 8.2 ka event, an excessive rebound immediately emerges in our δ 18 O and trace element records but moderate in the δ 13 C, probably suggesting pluvial conditions and nonlinear response of the local ecosystem. Following two similar severe droughts at 8.50 and 8.20 ka, the different behavior of δ 13 C suggests the recovering degree of resilient ecosystem responding to different rebounded rainfall intensity. A comparison with other high-resolution records suggests that the two droughts–one pluvial pattern between 8.52 and 8.0 ka is of global significance instead of being a regional phenomenon, and is causally linked to the slowdown and acceleration of the Atlantic Meridional Overturning Circulation that was further dominated by the freshwater injections in the North Atlantic. |
format |
Article in Journal/Newspaper |
author |
P. Duan H. Li Z. Ma J. Zhao X. Dong A. Sinha P. Hu H. Zhang Y. Ning G. Zhu H. Cheng |
author_facet |
P. Duan H. Li Z. Ma J. Zhao X. Dong A. Sinha P. Hu H. Zhang Y. Ning G. Zhu H. Cheng |
author_sort |
P. Duan |
title |
A series of climate oscillations around 8.2 ka revealed through multi-proxy speleothem records from North China |
title_short |
A series of climate oscillations around 8.2 ka revealed through multi-proxy speleothem records from North China |
title_full |
A series of climate oscillations around 8.2 ka revealed through multi-proxy speleothem records from North China |
title_fullStr |
A series of climate oscillations around 8.2 ka revealed through multi-proxy speleothem records from North China |
title_full_unstemmed |
A series of climate oscillations around 8.2 ka revealed through multi-proxy speleothem records from North China |
title_sort |
series of climate oscillations around 8.2 ka revealed through multi-proxy speleothem records from north china |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/cp-20-1401-2024 https://doaj.org/article/011022b144d748378eea80e1d0e56d25 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Climate of the Past, Vol 20, Pp 1401-1414 (2024) |
op_relation |
https://cp.copernicus.org/articles/20/1401/2024/cp-20-1401-2024.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-20-1401-2024 1814-9324 1814-9332 https://doaj.org/article/011022b144d748378eea80e1d0e56d25 |
op_doi |
https://doi.org/10.5194/cp-20-1401-2024 |
container_title |
Climate of the Past |
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20 |
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6 |
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1401 |
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1414 |
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1809928615105658880 |