干旱区生态环境知识资源中心(Arid): The centennial-resolution loess δDwax record indicates summer precipitation variations in the marginal region of the East Asian monsoon during the last deglaciation

Arid

DOI	10.1016/j.palaeo.2023.111961
	The centennial-resolution loess δDwax record indicates summer precipitation variations in the marginal region of the East Asian monsoon during the last deglaciation
	Wang, Zheng; Zhang, Fan; Xing, Meng; Cao, Yunning; Hu, Jing; Dong, Jibao; Wang, Huanye; Lu, Hongxuan; Liu, Hu; Liu, Zhonghui; Liu, Weiguo
通讯作者	Wang, Z
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2024
卷号	635
英文摘要	Precipitation isotopic composition variations that are directly recorded in geological samples play an important role in understanding past hydroclimatic changes. In arid regions, the hydrogen isotopes of leaf wax (delta Dwax) in loess sections can provide records of summer precipitation isotopes. However, previous studies have primarily focused on the orbital scale, and there was still a lack of clear understanding of variations in precipitation iso-topes on shorter timescales and their implications for climate change. In this study, we report centennial -resolution loess delta Dwax records from the central Chinese Loess Plateau (CLP) from the last deglaciation to the early Holocene. We compared the loess optically stimulated luminescence chronology and U-Th ages conveyed by linking stalagmite delta 18O and loess delta Dwax to validate the delta Dwax method as a potential tool for assessing loess chronology on the suborbital scale. Our findings also indicated that regional precipitation isotopes experienced a depletion of approximately 24%o for delta D and around 3.2%o for delta 18O during the last deglaciation. The overall precipitation isotope amplitude in the central CLP was similar to that of typical East Asian monsoon regions and lower than that of the Indian monsoon and westerly regions. However, the precipitation isotope oscillations on the millennial scale in the central CLP were significantly weaker than those in eastern to central China. The finding affirmed that although the summer precipitation in the CLP was primarily influenced by the East Asian monsoon system at the orbital scale, the northern boundary of the summer rain belt remained a distance away from the interior of the CLP during the last deglaciation. As a result, the short-term oscillations of atmospheric circulation were not strongly reflected in the precipitation isotopes of the central CLP. This result highlighted spatial and temporal differences in precipitation isotope variability between the dominant and marginal regions of the East Asian monsoon system.
英文关键词	Hydrogen isotopes of leaf wax Last deglaciation Chinese Loess Plateau Asia summer monsoon variations
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001139449400001
WOS关键词	HYDROGEN ISOTOPIC COMPOSITIONS ; LEAF-WAX BIOMARKERS ; CHAIN N-ALKANES ; CHINESE LOESS ; GLACIAL MAXIMUM ; VEGETATION CHARACTERISTICS ; PALEOSOL SEQUENCE ; CLIMATE-CHANGE ; PLATEAU ; HYDROCLIMATE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405024
推荐引用方式 GB/T 7714	Wang, Zheng,Zhang, Fan,Xing, Meng,et al. The centennial-resolution loess δDwax record indicates summer precipitation variations in the marginal region of the East Asian monsoon during the last deglaciation[J],2024,635.
APA	Wang, Zheng.,Zhang, Fan.,Xing, Meng.,Cao, Yunning.,Hu, Jing.,...&Liu, Weiguo.(2024).The centennial-resolution loess δDwax record indicates summer precipitation variations in the marginal region of the East Asian monsoon during the last deglaciation.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,635.
MLA	Wang, Zheng,et al."The centennial-resolution loess δDwax record indicates summer precipitation variations in the marginal region of the East Asian monsoon during the last deglaciation".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 635(2024).