气候变化领域集成服务门户(CCPortal): Effect of precipitation seasonality on annual oxygen isotopic composition in the area of spring persistent rain in southeastern China and its paleoclimatic implication

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DOI	10.5194/cp-16-211-2020
	Effect of precipitation seasonality on annual oxygen isotopic composition in the area of spring persistent rain in southeastern China and its paleoclimatic implication
	Zhang H.; Cheng H.; Cai Y.; Spötl C.; Sinha A.; Kathayat G.; Li H.
发表日期	2020
ISSN	18149324
起始页码	211
结束页码	225
卷号	16 期号:1
英文摘要	This study examines the seasonality of precipitation amount and δ18O over the monsoon region of China (MRC). We found that the precipitation amount associated with the East Asian summer monsoon (EASM) in the spring persistent rain (SPR) region is equivalent to that of the nonsummer monsoon (NSM). The latter contributes ∼ 50% to amount-weighted annual δ18O values, in contrast with other areas in the MRC, where the δ18O of annual precipitation is dominated by EASM precipitation. Interannual relationships between the El Niño-Southern Oscillation (ENSO) index, simulated δ18O data from IsoGSM, and seasonal precipitation amount in the SPR region were also examined. We found that on interannual timescales, the seasonality of precipitation amount (EASM =NSM ratio) was modulated by ENSO and primarily influences the variability of amountweighted annual precipitation δ18O values in the SPR region, although integrated regional convection and moisture source and transport distance may also play subordinate roles. During El Niño (La Niña) phases, less (more) EASM and more (less) NSM precipitation leading to lower (higher) EASM=NSM precipitation amount ratios results in higher (lower) amount-weighted annual precipitation δ18O values and, consequently, in higher (lower) speleothem δ18O values. Characterizing spatial differences in seasonal precipitation is, therefore, key to correctly interpreting speleothem δ18O records from the MRC. © Author(s) 2020.
语种	英语
scopus关键词	atmospheric convection; El Nino; El Nino-Southern Oscillation; isotopic composition; oxygen isotope; paleoclimate; precipitation (climatology); seasonality; spatial variation; speleothem; spring (season); China
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146749
作者单位	Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, 710054, China; Institute of Earth Environment, Chinese Academy of Sciences, State Key Laboratory of Loess and Quaternary Geology, Xi'an, 710061, China; Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, United States; Institute of Geology, University of Innsbruck, Innsbruck, 6020, Austria; Department of Earth Science, California State University Dominguez Hills, Carson, CA 90747, United States
推荐引用方式 GB/T 7714	Zhang H.,Cheng H.,Cai Y.,et al. Effect of precipitation seasonality on annual oxygen isotopic composition in the area of spring persistent rain in southeastern China and its paleoclimatic implication[J],2020,16(1).
APA	Zhang H..,Cheng H..,Cai Y..,Spötl C..,Sinha A..,...&Li H..(2020).Effect of precipitation seasonality on annual oxygen isotopic composition in the area of spring persistent rain in southeastern China and its paleoclimatic implication.Climate of the Past,16(1).
MLA	Zhang H.,et al."Effect of precipitation seasonality on annual oxygen isotopic composition in the area of spring persistent rain in southeastern China and its paleoclimatic implication".Climate of the Past 16.1(2020).