气候变化领域集成服务门户(CCPortal): Dipolar mode of precipitation changes between north China and the Yangtze River Valley existed over the entire Holocene: Evidence from the sediment record of Nanyi Lake

CCPortal

DOI	10.1002/joc.6906
	Dipolar mode of precipitation changes between north China and the Yangtze River Valley existed over the entire Holocene: Evidence from the sediment record of Nanyi Lake
	Liu, Jianbao; Shen, Zhongwei; Chen, Wei; Chen, Jie; Zhang, Xu; Chen, Jianhui; Chen, Fahu
通讯作者	Chen, FH (通讯作者)
发表日期	2021
ISSN	0899-8418
EISSN	1097-0088
起始页码	1667
结束页码	1681
卷号	41 期号:3
英文摘要	Instrumental data indicate the occurrence of a dipolar pattern of precipitation anomalies between north China and the Yangtze River Valley (YRV), which was termed northern drought (flood)-southern flood (drought) scenario. It has been shown that this pattern occurred during the Medieval Climate Anomaly (MCA) and the Little Ice Age (LIA). However, there are questions about whether this dipolar pattern also occurred during the entire Holocene, and the mechanism responsible. Addressing these questions is of fundamental importance for understanding the spatiotemporal evolution of precipitation in East Asian summer monsoon region. Numerous studies of north China have demonstrated that the mid-Holocene was humid, and the early and late Holocene were dry. However, there are relatively few equivalent studies in the YRV. To this end, we conducted detailed geochemical analysis of an AMS C-14-dated sediment core from Lake Nanyi in the YRV. Our results indicate humid periods at Lake Nanyi occurred during 11.5-8.0 ka and from 2.0 ka to the present, while dry conditions occurred during similar to 8.0-2.0 ka. These results, together with published records from Dajiuhu peatland and Heshang Cave, collectively indicate in the YRV, the mid-Holocene (similar to 8.0-3.0 ka) was dry, while the early and late Holocene were humid, which is the inverse of the pattern in north China. Thus, we conclude there was an asynchronous evolution of hydroclimatic changes between north China and the YRV during the Holocene. We interpret this dipolar pattern as the result of ENSO variations: in a La Nina-like state, the Western Pacific Subtropical High retreated northeastward, which would enable the rainfall belt to move northward and result in increased (decreased) precipitation in north China (the YRV). Sea surface temperature records from the Pacific Ocean and model simulations support this mechanism: a La Nina-like state in the mid-Holocene resulted in more (less) precipitation in north China (the YRV).
关键词	EAST-ASIAN SUMMER CLIMATE-CHANGE MOISTURE EVOLUTION MONSOON VEGETATION POLLEN LOESS VARIABILITY EVENT MOUNTAINS
英文关键词	East Asian summer monsoon; elemental analysis; lake sediments; precipitation; the Holocene; the Yangtze River Valley
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000585604100001
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260138
推荐引用方式 GB/T 7714	Liu, Jianbao,Shen, Zhongwei,Chen, Wei,et al. Dipolar mode of precipitation changes between north China and the Yangtze River Valley existed over the entire Holocene: Evidence from the sediment record of Nanyi Lake[J]. 中国科学院青藏高原研究所,2021,41(3).
APA	Liu, Jianbao.,Shen, Zhongwei.,Chen, Wei.,Chen, Jie.,Zhang, Xu.,...&Chen, Fahu.(2021).Dipolar mode of precipitation changes between north China and the Yangtze River Valley existed over the entire Holocene: Evidence from the sediment record of Nanyi Lake.INTERNATIONAL JOURNAL OF CLIMATOLOGY,41(3).
MLA	Liu, Jianbao,et al."Dipolar mode of precipitation changes between north China and the Yangtze River Valley existed over the entire Holocene: Evidence from the sediment record of Nanyi Lake".INTERNATIONAL JOURNAL OF CLIMATOLOGY 41.3(2021).