干旱区生态环境知识资源中心(Arid): Holocene C3/C4 vegetation variations in arid Central Asia: Implications for paleoclimate

Arid

DOI	10.1016/j.palaeo.2022.110905
	Holocene C3/C4 vegetation variations in arid Central Asia: Implications for paleoclimate
	Zhao, Jiaju; An, Chengbang; Zhao, Yongtao; Dong, Weimiao
通讯作者	Zhao, JJ ; An, CB
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2022
卷号	592
英文摘要	Understanding past climate and environmental evolutions is of great significance for predicting the future in the context of global warming in arid Central Asia. Here, we report new Holocene paleovegetation records based on the concentrations and distributions of leaf wax long chain (C-28-C-32) n-acids and stable carbon isotopes of leaf wax C-28 n-acid from Lake Balikun, arid Central Asia. The long chain (C-28-C-32) n-acid concentrations show two distinct terrestrial vegetation degradation and desertification events during periods of 12.0-7.8 ka (1 ka = 1000 cal. yr BP) and 5.8-3.6 ka, indicating dry climate conditions. We reconstructed Holocene C-4 plant relative abundance variations (ranging from 0 to 49%) based on stable carbon isotope records of leaf wax C-28 n-acid. The C-4 plants show large fluctuations in the early Holocene, high abundance in the mid-Holocene and a decrease of 40% after 3.6 ka, which is likely driven by precipitation seasonality. In Lake Balikun, the C-4 grass expansion during 7.8-5.8 ka indicates significantly increased summer precipitation, resulting in a wet climate during the warm mid-Holocene. In contrast, C-3 plant expansion indicates the increased contribution of precipitation in winter and spring seasons during the late Holocene. According to our results, we propose that the regional and temporal differences in the Holocene optimum moisture and moisture-temperature relationships are likely attributed to asynchronous precipitation in the winter-spring and summer seasons, linked to the interaction of westerlies and the Asian summer monsoon.
英文关键词	Leaf wax carbon isotope C-3/C-4 vegetation Precipitation seasonality Holocene Lake Balikun
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000793174800003
WOS关键词	WINTER-SPRING PRECIPITATION ; N-ALKYL LIPIDS ; GEOGRAPHICAL-DISTRIBUTION ; MOISTURE EVOLUTION ; SURROUNDING AREAS ; CLIMATIC CHANGES ; LAKE BARKOL ; C-4 PLANTS ; XINJIANG ; VARIABILITY
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/2XILL650/393902
推荐引用方式 GB/T 7714	Zhao, Jiaju,An, Chengbang,Zhao, Yongtao,et al. Holocene C3/C4 vegetation variations in arid Central Asia: Implications for paleoclimate[J],2022,592.
APA	Zhao, Jiaju,An, Chengbang,Zhao, Yongtao,&Dong, Weimiao.(2022).Holocene C3/C4 vegetation variations in arid Central Asia: Implications for paleoclimate.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,592.
MLA	Zhao, Jiaju,et al."Holocene C3/C4 vegetation variations in arid Central Asia: Implications for paleoclimate".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 592(2022).