ENSO effect on hydroclimate changes in southeastern China over the past two millennia

Jianshun Chen; Kan Zhao; Yongjin Wang; Yingfang Cui; Yijia Liang; Qingfeng Shao; Hai Cheng; R. Lawrence Edwards; Fucai Duan; Shitao Chen; Chuang Pian; Junji Zhu

doi:10.1016/j.quascirev.2022.107539

ENSO effect on hydroclimate changes in southeastern China over the past two millennia

Jianshun Chen, Kan Zhao, Yongjin Wang, Yingfang Cui, Yijia Liang, Qingfeng Shao, Hai Cheng, R. Lawrence Edwards, Fucai Duan, Shitao Chen, Chuang Pian, Junji Zhu

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Abstract

Meteorological observations indicate that both natural and anthropogenic forcing contribute to regional drought/flood in the East Asian summer monsoon (EASM) domain. However, spatiotemporal rainfall pattern and its dynamics during natural climatic variability remains unclear. Here we reconstruct a ∼3 year-resolution EASM precipitation record over the past two millennia, based on 13 ²³⁰Th dates and 600 δ¹⁸O in a stalagmite from Songya Cave, southeastern China. The δ¹⁸O sequence shows a long-term decreasing trend, indicating an increasing monsoon precipitation over the past two millennia. A series of centennial-scale fluctuations are superimposed on the long-term trend, with a wetter Little Ice Age than the Medieval Warm Period. The long-term trend and centennial-scale oscillations in EASM rainfall are broadly related to El Niño-Southern Oscillation (ENSO) and Pacific decadal oscillation (PDO) variations, with an increased (decreased) EASM rainfall corresponding to El Niño-like (La Niña-like) conditions and positive (negative) phase of PDO. Comparison of δ¹⁸O records from Songya and Wanxiang Cave shows an anti-phased spatial rainfall pattern between southeastern and northwestern China. This spatiotemporal rainfall pattern, consistent with the modern observations, is possibly regulated by the ENSO, through changes in the location and strength of the Western Pacific Subtropical High (WPSH).

Original language	English (US)
Article number	107539
Journal	Quaternary Science Reviews
Volume	285
DOIs	https://doi.org/10.1016/j.quascirev.2022.107539
State	Published - Jun 1 2022
Externally published	Yes

Bibliographical note

Funding Information:
We thank Dr. Zhenqiu Zhang and Ms. Lianhua Xue for their help with the isotope analyses. This work was supported by National Natural Science Foundation of China (Grants 41931178 , 42071105 , 41877430 , 42072207 ), Postgraduate Research & Practice Innovation Program of Jiangsu Province , the U.S. National Science Foundation (Grant 1702816 ), the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (Grant 164320H116 ), Jiangsu Province “Qinglan Project” (2020), the 111 Program of China (Grant D19002 ) and State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS (No. SKLLQG2120 ).

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

EASM
ENSO
Southeastern China
Stalagmite
The last two millennia

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title = "ENSO effect on hydroclimate changes in southeastern China over the past two millennia",

abstract = "Meteorological observations indicate that both natural and anthropogenic forcing contribute to regional drought/flood in the East Asian summer monsoon (EASM) domain. However, spatiotemporal rainfall pattern and its dynamics during natural climatic variability remains unclear. Here we reconstruct a ∼3 year-resolution EASM precipitation record over the past two millennia, based on 13 230Th dates and 600 δ18O in a stalagmite from Songya Cave, southeastern China. The δ18O sequence shows a long-term decreasing trend, indicating an increasing monsoon precipitation over the past two millennia. A series of centennial-scale fluctuations are superimposed on the long-term trend, with a wetter Little Ice Age than the Medieval Warm Period. The long-term trend and centennial-scale oscillations in EASM rainfall are broadly related to El Ni{\~n}o-Southern Oscillation (ENSO) and Pacific decadal oscillation (PDO) variations, with an increased (decreased) EASM rainfall corresponding to El Ni{\~n}o-like (La Ni{\~n}a-like) conditions and positive (negative) phase of PDO. Comparison of δ18O records from Songya and Wanxiang Cave shows an anti-phased spatial rainfall pattern between southeastern and northwestern China. This spatiotemporal rainfall pattern, consistent with the modern observations, is possibly regulated by the ENSO, through changes in the location and strength of the Western Pacific Subtropical High (WPSH).",

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author = "Jianshun Chen and Kan Zhao and Yongjin Wang and Yingfang Cui and Yijia Liang and Qingfeng Shao and Hai Cheng and Edwards, {R. Lawrence} and Fucai Duan and Shitao Chen and Chuang Pian and Junji Zhu",

note = "Funding Information: We thank Dr. Zhenqiu Zhang and Ms. Lianhua Xue for their help with the isotope analyses. This work was supported by National Natural Science Foundation of China (Grants 41931178 , 42071105 , 41877430 , 42072207 ), Postgraduate Research & Practice Innovation Program of Jiangsu Province , the U.S. National Science Foundation (Grant 1702816 ), the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (Grant 164320H116 ), Jiangsu Province “Qinglan Project” (2020), the 111 Program of China (Grant D19002 ) and State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS (No. SKLLQG2120 ). Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

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AU - Chen, Jianshun

AU - Zhao, Kan

AU - Wang, Yongjin

AU - Cui, Yingfang

AU - Liang, Yijia

AU - Shao, Qingfeng

AU - Cheng, Hai

AU - Edwards, R. Lawrence

AU - Duan, Fucai

AU - Chen, Shitao

AU - Pian, Chuang

AU - Zhu, Junji

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PY - 2022/6/1

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N2 - Meteorological observations indicate that both natural and anthropogenic forcing contribute to regional drought/flood in the East Asian summer monsoon (EASM) domain. However, spatiotemporal rainfall pattern and its dynamics during natural climatic variability remains unclear. Here we reconstruct a ∼3 year-resolution EASM precipitation record over the past two millennia, based on 13 230Th dates and 600 δ18O in a stalagmite from Songya Cave, southeastern China. The δ18O sequence shows a long-term decreasing trend, indicating an increasing monsoon precipitation over the past two millennia. A series of centennial-scale fluctuations are superimposed on the long-term trend, with a wetter Little Ice Age than the Medieval Warm Period. The long-term trend and centennial-scale oscillations in EASM rainfall are broadly related to El Niño-Southern Oscillation (ENSO) and Pacific decadal oscillation (PDO) variations, with an increased (decreased) EASM rainfall corresponding to El Niño-like (La Niña-like) conditions and positive (negative) phase of PDO. Comparison of δ18O records from Songya and Wanxiang Cave shows an anti-phased spatial rainfall pattern between southeastern and northwestern China. This spatiotemporal rainfall pattern, consistent with the modern observations, is possibly regulated by the ENSO, through changes in the location and strength of the Western Pacific Subtropical High (WPSH).

AB - Meteorological observations indicate that both natural and anthropogenic forcing contribute to regional drought/flood in the East Asian summer monsoon (EASM) domain. However, spatiotemporal rainfall pattern and its dynamics during natural climatic variability remains unclear. Here we reconstruct a ∼3 year-resolution EASM precipitation record over the past two millennia, based on 13 230Th dates and 600 δ18O in a stalagmite from Songya Cave, southeastern China. The δ18O sequence shows a long-term decreasing trend, indicating an increasing monsoon precipitation over the past two millennia. A series of centennial-scale fluctuations are superimposed on the long-term trend, with a wetter Little Ice Age than the Medieval Warm Period. The long-term trend and centennial-scale oscillations in EASM rainfall are broadly related to El Niño-Southern Oscillation (ENSO) and Pacific decadal oscillation (PDO) variations, with an increased (decreased) EASM rainfall corresponding to El Niño-like (La Niña-like) conditions and positive (negative) phase of PDO. Comparison of δ18O records from Songya and Wanxiang Cave shows an anti-phased spatial rainfall pattern between southeastern and northwestern China. This spatiotemporal rainfall pattern, consistent with the modern observations, is possibly regulated by the ENSO, through changes in the location and strength of the Western Pacific Subtropical High (WPSH).

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ENSO effect on hydroclimate changes in southeastern China over the past two millennia

Abstract

Bibliographical note

Keywords

UN SDGs

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