On the timing of the East Asian summer monsoon maximum during the Holocene—Does the speleothem oxygen isotope record reflect monsoon rainfall variability?
On the timing of the East Asian summer monsoon maximum during the Holocene—Does the speleothem oxygen isotope record reflect monsoon rainfall variability?作者机构：Key Laboratory of West China s Environmental System(Ministry of Education)College of Earth and Environmental SciencesLanzhou University Department of GeosciencesUniversity of Arkansas Institute of Nihewan Archaeology ResearchHebei Normal University
出 版 物：《Science China Earth Sciences》 (中国科学:地球科学(英文版))
年 卷 期：2016年第59卷第12期
页 面：2328-2338页
核心收录：
学科分类：070905[理学-第四纪地质学] 070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学]
基 金：supported by the National Natural Science Foundation of China(Grant Nos.41130102 & 41471162) the Fundamental Research Funds for the Central Universities(Grant Nos.LZUJBKY-2015-K09 & LZUJBKY-2015-124) JC is partially supported by the Chinese Scholarship Council
主 题：East Asian summer monsoon Holocene Speleothem oxygen isotopes
摘 要：The evolution of the East Asian summer monsoon(EASM) during the Holocene has long been of significant *** of past EASM variability not only increases our understanding of monsoon dynamics on a long timescale,but it also provides an environmental and climatic background for research into Chinese cultural ***,the timing of the EASM maximum remains *** popular concept of an early Holocene maximum is mainly based on speleothemδ18O(δ18Oc) records from caves in southern China;however,the interpretation of δ18OCas a reliable proxy for EASM intensity is being increasingly *** present paper is a critical review of the climatic significance of the δ18OCrecord from ***,we suggest that precipitation in northern China is an appropriate index of EASM intensity,the variation of which clearly indicates a mid-Holocene monsoon ***,an interregional comparison demonstrates that the precipitation record in northern China is quite different from that in southern China on a range of timescales,and is inconsistent with the spatial similarity exhibited by speleothem oxygen isotope ***,both modeling and observational data show that the δ18OCrecords from southern China indeed reflect changes in precipitation δ18O(δ18OP) rather than precipitation amount,and therefore that their use as an EASM proxy is ***,we address several significant monsoon-related issues-including the driving mechanism of the EASM on an orbital timescale,the climatic significance of speleothem oxygen isotopes,and the relationship between atmospheric circulation and precipitation in monsoonal regions.
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