气候变化领域集成服务门户(CCPortal): Holocene variability of East Asian summer monsoon as viewed from the speleothem δ18O records in central China

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DOI	10.1016/j.epsl.2021.116758
	Holocene variability of East Asian summer monsoon as viewed from the speleothem δ18O records in central China
	Cai Y.; Cheng X.; Ma L.; Mao R.; Breitenbach S.F.M.; Zhang H.; Xue G.; Cheng H.; Edwards R.L.; An Z.
发表日期	2021
ISSN	0012821X
卷号	558
英文摘要	Monsoon precipitation in East China shows distinct spatial distribution and its variability is closely linked with the changes of the East Asian summer monsoon (EASM). Located in the transition zone between the southern subtropical humid climate and the northern warm temperate semi-humid climate, central China is a core region for recognizing and understanding the spatio-temporal variability of the EASM. Using U-series dating and stable isotope analysis on five stalagmites (MG-1, MG-2, MG-7, MG-40 and MG-64) from Magou Cave, Henan Province, Central China, we construct a high-resolution and precisely dated composite stalagmite δ18O time series covering most of the Holocene. This composite record reveals variations in precipitation δ18O between 11.7 and 1.1 ka BP with average resolution of ∼4 yrs. The Magou composite record demonstrates that EASM intensity dominates long-term changes in precipitation δ18O, which generally follows the northern hemisphere summer insolation (NHSI) trend. Both, Ensemble Empirical Mode Decomposition (EEMD) and wavelet filtering analyses real that the amplitudes of long-term (100-500 and 500-3000 yrs) components were slightly reduced between 8.5 and 4.9 ka BP, implying a weakened influence of climatic forcings on centennial and even millennial timescales during this warm period. Variance on 1-30-yr timescales is relatively low and ascribed to sampling resolution. Fourteen weak EASM intervals, including the 8.2 ka event, were identified within the period corresponding broadly with the Holocene Megathermal. Since no cold excursions other than the 8.2 ka event are found in the Greenland ice core records, we tentatively propose that oscillations in tropical sea surface temperature (SST) likely play an important role in steering other weak monsoon events. Aligning the Magou composite record and other moisture records with archaeological records from the study region, it seems that climate change influenced both the spatial distribution and agricultural practices of ancient cultures. However, overall moderate climatic changes in this region, most likely characterized by shifts between subtropical humid climate and warm temperate semi-humid climate, supported a generally consecutive development of ancient cultures without major hiatuses. © 2021 Elsevier B.V.
关键词	central China East Asian summer monsoon Holocene stable isotopes stalagmite variability
英文关键词	Agricultural robots; Atmospheric thermodynamics; Glacial geology; Oceanography; Spatial distribution; Surface waters; Time series analysis; Tropics; Wavelet decomposition; Agricultural practices; East Asian summer monsoon; Ensemble empirical mode decompositions (EEMD); Monsoon precipitation; Northern Hemispheres; Sea surface temperature (SST); Spatiotemporal variability; Stable-isotope analysis; Climate change; Holocene; monsoon; oxygen isotope; paleoclimate; speleothem; stable isotope; stalagmite; summer; China
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203042
作者单位	State Key Laboratory of Loess and Quaternary Geology, Center for Excellence in Quaternary Science and Global Change, Institute of Earth Environment, Chinese Academy of Science, Xi'an, 710061, China; Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, 710049, China; Open Studio for OCCEC, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Department of Geography and Environmental Sciences, Northumbria UniversityNE1 8ST, United Kingdom; Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, United States
推荐引用方式 GB/T 7714	Cai Y.,Cheng X.,Ma L.,et al. Holocene variability of East Asian summer monsoon as viewed from the speleothem δ18O records in central China[J],2021,558.
APA	Cai Y..,Cheng X..,Ma L..,Mao R..,Breitenbach S.F.M..,...&An Z..(2021).Holocene variability of East Asian summer monsoon as viewed from the speleothem δ18O records in central China.Earth and Planetary Science Letters,558.
MLA	Cai Y.,et al."Holocene variability of East Asian summer monsoon as viewed from the speleothem δ18O records in central China".Earth and Planetary Science Letters 558(2021).