气候变化领域集成服务门户(CCPortal): Integrating paleolimnological hydrogen and oxygen isotope records during the Holocene on the Tibetan Plateau

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DOI	10.1016/j.gloplacha.2024.104432
	Integrating paleolimnological hydrogen and oxygen isotope records during the Holocene on the Tibetan Plateau
	Gao, Xiaoxue; Sun, Zhe; Hou, Xiaohuan; Ji, Kejia; Wang, Mingda; Hou, Juzhi
发表日期	2024
ISSN	0921-8181
EISSN	1872-6364
起始页码	236
卷号	236
英文摘要	Stable isotopes are effective proxy indicators for past climate and environment changes. Paleolimnological hydrogen and oxygen isotopes have been used to reconstruct changes in precipitation isotopes and continental climates. However, the stable hydrogen and oxygen isotope records from lakes are rarely compared and integrated directly to study past changes in climate and environment due to their different fractionation pathways. Combined studies on hydrogen and oxygen isotopes would provide much more information than single isotope records. Here, we reanalyzed published lacustrine hydrogen and oxygen isotope records across the Tibetan Plateau, to investigate how both isotope records reveal the influences of the Indian summer monsoon and the westerlies on the Plateau throughout the Holocene. Principal component analysis (PCA) shows that the first principal component (PC1) of 16 lacustrine hydrogen isotope records resembles that of 28 oxygen isotope records. The PC1s of the hydrogen and oxygen isotope records were generally low at 12-6 ka BP, followed by gradual increase since 6 ka BP, suggesting the influence of the Indian summer monsoon. Reconstruction of Holocene precipitation isotopes showed that the slopes of segmented precipitation isotope lines generally followed changes in monsoon intensity. The PC2s for hydrogen and oxygen isotope records remained relatively low at similar to 8-4 ka BP, coinciding with moisture variation in westerlies dominated regions. The millennial-scale variations in both hydrogen and oxygen isotope records, revealed by the PC3-PC6, likely responded to the ice drift events in the North Atlantic Ocean, as well as differences in the isotope fractionation pathways at specific sites. The reanalysis of stable hydrogen and oxygen records across the Tibetan Plateau suggests that the water vapor source is the most important factor affecting the isotope variation, though the isotopic fractionation processes may differ significantly. Our results revealed nonlinear variations of monsoon and westerlies on the Tibetan Plateau during the Holocene. This review shows that integration of the stable hydrogen and oxygen isotope records would provide comprehensive understanding of the atmospheric circulation on the Tibetan Plateau.
英文关键词	Tibetan Plateau; Hydrogen isotope; Oxygen isotope; Holocene; Paleolimnology
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001222383900001
来源期刊	GLOBAL AND PLANETARY CHANGE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303820
作者单位	Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Sichuan Normal University; Liaoning Normal University
推荐引用方式 GB/T 7714	Gao, Xiaoxue,Sun, Zhe,Hou, Xiaohuan,et al. Integrating paleolimnological hydrogen and oxygen isotope records during the Holocene on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2024,236.
APA	Gao, Xiaoxue,Sun, Zhe,Hou, Xiaohuan,Ji, Kejia,Wang, Mingda,&Hou, Juzhi.(2024).Integrating paleolimnological hydrogen and oxygen isotope records during the Holocene on the Tibetan Plateau.GLOBAL AND PLANETARY CHANGE,236.
MLA	Gao, Xiaoxue,et al."Integrating paleolimnological hydrogen and oxygen isotope records during the Holocene on the Tibetan Plateau".GLOBAL AND PLANETARY CHANGE 236(2024).