气候变化领域集成服务门户(CCPortal): Variations of Stable Isotopic Composition in Atmospheric Water Vapor and their Controlling Factors—A 6-Year Continuous Sampling Study in Nanjing, Eastern China

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DOI	10.1029/2019JD031697
	Variations of Stable Isotopic Composition in Atmospheric Water Vapor and their Controlling Factors—A 6-Year Continuous Sampling Study in Nanjing, Eastern China
	Li Y.; An W.; Pang H.; Wu S.-Y.; Tang Y.; Zhang W.; Hou S.
发表日期	2020
ISSN	2169897X
卷号	125 期号:22
英文摘要	Long-term continuous monitoring of water vapor isotopes has great potential to improve our understanding of mechanisms that control stable isotope variations in hydrological processes, which is essential for accurate interpretation of isotopic proxy records. Here we presented a 6-year daily data set of stable isotopes in atmospheric water vapor (δ18Ov, δDv, and d-excessv) and precipitation (δ18Op, δDp, and d-excessp) at Nanjing in Eastern China, an area under the influence of the East Asian Monsoon. Based on isotopic variations, we divided a year into three seasons, that is, summer monsoon season (June–September), spring (March–May), and fall-winter (October–February). During summer monsoon season, the low δ18Ov values were mainly caused by the upstream convective rainout process during the large-scale water vapor transport, and the d-excessv values were the lowest due to the weak kinetic isotopic fractionation over its oceanic moisture source. Spring had the highest δ18Ov values, which was related to less distillation of local moisture under relatively high air temperatures. The relatively high d-excessv values resulted from the kinetic isotopic fractionation due to drier condition. The fall-winter season has the lowest δ18Ov values because the local distillation was the strongest with low air temperature. The d-excessv values were highest during this season because of the strongest kinetic isotopic fractionation during the continental moisture recycling under dry climate condition. Using the isotopic composition of both precipitation and water vapor, we found that the annual mean subcloud raindrop evaporation is ~11% of precipitation. These findings improve our understanding of hydrological cycle on the East Asian Monsoon region and will potentially improve our interpretation of numerous isotopic proxy records from this region. ©2020. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185648
作者单位	Key Laboratory of Coast and Island Development of Ministry of Education, School of Geography and Ocean Science, Nanjing University, Nanjing, China; Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; CAS Center for Excellence in Life and Paleoenvironment, Beijing, China; Collaborative Innovation Center of Climate Change, Jiangsu Province, Nanjing, China; Department of Geology, University of Dayton, Dayton, OH, United States; School of Oceanography, Shanghai Jiao Tong University, Shanghai, China
推荐引用方式 GB/T 7714	Li Y.,An W.,Pang H.,等. Variations of Stable Isotopic Composition in Atmospheric Water Vapor and their Controlling Factors—A 6-Year Continuous Sampling Study in Nanjing, Eastern China[J],2020,125(22).
APA	Li Y..,An W..,Pang H..,Wu S.-Y..,Tang Y..,...&Hou S..(2020).Variations of Stable Isotopic Composition in Atmospheric Water Vapor and their Controlling Factors—A 6-Year Continuous Sampling Study in Nanjing, Eastern China.Journal of Geophysical Research: Atmospheres,125(22).
MLA	Li Y.,et al."Variations of Stable Isotopic Composition in Atmospheric Water Vapor and their Controlling Factors—A 6-Year Continuous Sampling Study in Nanjing, Eastern China".Journal of Geophysical Research: Atmospheres 125.22(2020).