Interdecadal to Centennial Climate Variability Surrounding the 8.2 ka Event in North China Revealed Through an Annually Resolved Speleothem Record From Beijing

Pengzhen Duan; Hanying Li; Zhibang Ma; Jingyao Zhao; Xiyu Dong; Ashish Sinha; Peng Hu; Haiwei Zhang; Yanjun Cai; Youfeng Ning; R. Lawrence Edwards; Hai Cheng

doi:10.1029/2022GL101182

Interdecadal to Centennial Climate Variability Surrounding the 8.2 ka Event in North China Revealed Through an Annually Resolved Speleothem Record From Beijing

Pengzhen Duan, Hanying Li, Zhibang Ma, Jingyao Zhao, Xiyu Dong, Ashish Sinha, Peng Hu, Haiwei Zhang, Yanjun Cai, Youfeng Ning, R. Lawrence Edwards, Hai Cheng

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3 Scopus citations

Abstract

The 8.2 ka event has been extensively studied, whereas its structure is ambiguous in North China. Here we present a high-resolution (∼1 year) δ¹⁸O record from annual laminated speleothem from Beijing to characterize the detailed variability across this event in North China. Our record indicates a dry 8.2 ka event spanning 8.254–8.107 ka BP with a two-stage structure superimposed by three prominent high δ¹⁸O excursions. The identical structure of speleothem δ¹⁸O records between North and central China during the event suggests a common forcing/response in East China, whereas the progressively increased offset between their average values may reflect changes in moisture source or rainout effect. A close comparison with the Greenland ice core records suggests a strong linear response of the Asian summer monsoon to the North Atlantic climate changes across the early and middle stages of the event, but a different mechanism in the termination processes.

Original language	English (US)
Article number	e2022GL101182
Journal	Geophysical Research Letters
Volume	50
Issue number	1
DOIs	https://doi.org/10.1029/2022GL101182
State	Published - Jan 16 2023
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China Grants (41731174, 41888101, and 42150710534 to H.C.). We thank Prof. Ming Tan, Dr. Wuhui Duan, Jiapeng Miao, and Xian Wu for their suggestions and help on the modern climate analysis. We thank Xiaoli Qu from Xi'an Jiaotong University for helping on CLFM scanning.

Funding Information:
This work was supported by the National Natural Science Foundation of China Grants (41731174, 41888101, and 42150710534 to H.C.). We thank Prof. Ming Tan, Dr. Wuhui Duan, Jiapeng Miao, and Xian Wu for their suggestions and help on the modern climate analysis. We thank Xiaoli Qu from Xi'an Jiaotong University for helping on CLFM scanning.

Publisher Copyright:
© 2022. The Authors.

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Duan, P., Li, H., Ma, Z., Zhao, J., Dong, X., Sinha, A., Hu, P., Zhang, H., Cai, Y., Ning, Y., Edwards, R. L., & Cheng, H. (2023). Interdecadal to Centennial Climate Variability Surrounding the 8.2 ka Event in North China Revealed Through an Annually Resolved Speleothem Record From Beijing. Geophysical Research Letters, 50(1), Article e2022GL101182. https://doi.org/10.1029/2022GL101182

Duan, P, Li, H, Ma, Z, Zhao, J, Dong, X, Sinha, A, Hu, P, Zhang, H, Cai, Y, Ning, Y, Edwards, RL & Cheng, H 2023, 'Interdecadal to Centennial Climate Variability Surrounding the 8.2 ka Event in North China Revealed Through an Annually Resolved Speleothem Record From Beijing', Geophysical Research Letters, vol. 50, no. 1, e2022GL101182. https://doi.org/10.1029/2022GL101182

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abstract = "The 8.2 ka event has been extensively studied, whereas its structure is ambiguous in North China. Here we present a high-resolution (∼1 year) δ18O record from annual laminated speleothem from Beijing to characterize the detailed variability across this event in North China. Our record indicates a dry 8.2 ka event spanning 8.254–8.107 ka BP with a two-stage structure superimposed by three prominent high δ18O excursions. The identical structure of speleothem δ18O records between North and central China during the event suggests a common forcing/response in East China, whereas the progressively increased offset between their average values may reflect changes in moisture source or rainout effect. A close comparison with the Greenland ice core records suggests a strong linear response of the Asian summer monsoon to the North Atlantic climate changes across the early and middle stages of the event, but a different mechanism in the termination processes.",

author = "Pengzhen Duan and Hanying Li and Zhibang Ma and Jingyao Zhao and Xiyu Dong and Ashish Sinha and Peng Hu and Haiwei Zhang and Yanjun Cai and Youfeng Ning and Edwards, {R. Lawrence} and Hai Cheng",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China Grants (41731174, 41888101, and 42150710534 to H.C.). We thank Prof. Ming Tan, Dr. Wuhui Duan, Jiapeng Miao, and Xian Wu for their suggestions and help on the modern climate analysis. We thank Xiaoli Qu from Xi'an Jiaotong University for helping on CLFM scanning. Funding Information: This work was supported by the National Natural Science Foundation of China Grants (41731174, 41888101, and 42150710534 to H.C.). We thank Prof. Ming Tan, Dr. Wuhui Duan, Jiapeng Miao, and Xian Wu for their suggestions and help on the modern climate analysis. We thank Xiaoli Qu from Xi'an Jiaotong University for helping on CLFM scanning. Publisher Copyright: {\textcopyright} 2022. The Authors.",

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