气候变化领域集成服务门户(CCPortal): Relationship between the Asian summer monsoon circulation and speleothem δ18O of Xiaobailong cave

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DOI	10.1007/s00382-019-04935-6
	Relationship between the Asian summer monsoon circulation and speleothem δ18O of Xiaobailong cave
	Yang Y.; Yang R.; Cao J.; Zhao J.; Cheng H.; Wang J.
发表日期	2019
ISSN	0930-7575
起始页码	6351
结束页码	6362
卷号	53 期号:2020-09-10
英文摘要	The negative correlation between the local precipitation and speleothem δ18O is used extensively in the study of monsoon variability. However, the correlation coefficient between them do not always pass the significance test, which makes it difficult to interpret the monsoon variability using speleothem δ18O. In this study, regression analysis and corresponding significance test method are employed to investigate the relationship between the Asian summer monsoon circulation and speleothem δ18O of Xiaobailong cave using CERA-20C, speleothem δ18O of Xiaobailong cave, and precipitation and temperature data from 8 meteorological stations around the cave. Diagnostic results indicate that the speleothem δ18O of Xiaobailong cave can reflect the variability of Asian summer monsoon circulation via the rainout effect from the nearest upstream sources to destination. The stronger (weaker) ASM circulation causes isotopically depleted (enriched) water vapor via enhancing (reducing) the Rayleigh distillation processes during the transport of water vapor from the northern Bay of Bengal and the northern South China Sea to the region around the cave. The lower (higher) isotope value in water vapor further leads to depleted (enriched) speleothem δ18O of Xiaobailong cave. The numerical experiments using isotope-incorporated spectral model substantiate the key physical process revealed in the observational analysis. These results provide an efficient way for reconstructing the paleomonsoon circulation with δ18O in speleothems, ice cores, and tree ring cellulose. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	air temperature; atmospheric circulation; cave; distillation; monsoon; oxygen isotope; precipitation (climatology); regression analysis; speleothem; water vapor; Bay of Bengal; Indian Ocean; Pacific Ocean; South China Sea
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145852
作者单位	Department of Atmospheric Sciences, Yunnan University, Kunming, 650500, China; Institute of Global Environmental Change, Xi’an Jiaotong University, Xi’an, 710049, China; Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, United States
推荐引用方式 GB/T 7714	Yang Y.,Yang R.,Cao J.,et al. Relationship between the Asian summer monsoon circulation and speleothem δ18O of Xiaobailong cave[J],2019,53(2020-09-10).
APA	Yang Y.,Yang R.,Cao J.,Zhao J.,Cheng H.,&Wang J..(2019).Relationship between the Asian summer monsoon circulation and speleothem δ18O of Xiaobailong cave.Climate Dynamics,53(2020-09-10).
MLA	Yang Y.,et al."Relationship between the Asian summer monsoon circulation and speleothem δ18O of Xiaobailong cave".Climate Dynamics 53.2020-09-10(2019).