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	Ecologic shift and aridification in the northern Tibetan Plateau revealed by leaf wax n-alkane delta H-2 and delta C-13 records
	Wu, Minghao1; Zhuang, Guangsheng1; Hou, Mingqiu1; Miao, Yunfa2
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2019-01-15
卷号	514页码:464-473
关键词	Qaidam Basin Paleoclimate Paleoecology Stable isotope Tectonic uplift Global cooling
ISSN号	0031-0182
DOI	10.1016/j.palaeo.2018.11.005
通讯作者	Zhuang, Guangsheng(gzhuang@lsu.edu)
英文摘要	Two competing factors, the global cooling and the uplift of Tibetan Plateau, have been proposed to drive the central Asian aridification, but their relative role has seldom been discriminated in paleoclimate and paleoenvironment records. Here, we reconstruct a 14-million-year-long record of paleohydrology and paleoecology in the western Qaidam Basin by applying the compound-specific hydrogen (delta H-2) and carbon (delta C-13) isotope analyses to terrestrial leaf wax long-chain n-alkanes. The delta H-2 values are low during the interval of 14.6 to 13.0 Ma. Then the delta H-2 increases from 13.0 to 12.2 Ma and maintains high values from 12.2 to 3.2 Ma with a peak high value of -156.1 parts per thousand at 8.0 Ma. After 3.2 Ma, the delta H-2 values are low and vary larger than 30 parts per thousand. The delta C-13 values decrease from 14.6 to 13.0 Ma and are low from 13.0 to 3.2 Ma except a high value at 3.8 Ma. Then they decrease slightly after 3.2 Ma. Low delta H-2 values indicate relatively wet climate between 14.6 and 13.0 Ma. The decreasing delta C-13 values during the same time period support the ecologic shift with the decline of warm component of conifers after the Mid-Miocene Climatic Optimum. High delta H-2 values since 13.0 Ma are synchronous with the uplift of northern Tibetan Plateau, implying tectonics-driven aridity. Large-amplitude variation in delta H-2 values since ca. 3.2 Ma seen in East and West Qaidam and lower delta C-13 values reveal the climatic cyclic responses to the Northern Hemisphere Glaciation.
收录类别	SCI
WOS关键词	WESTERN QAIDAM BASIN ; STABLE-ISOTOPE COMPOSITION ; MIDDLE MIOCENE ; CENTRAL-ASIA ; CLIMATE-CHANGE ; INTENSIFIED ARIDITY ; TECTONIC UPLIFT ; QILIAN SHAN ; SEDIMENTARY RECORDS ; TOPOGRAPHIC GROWTH
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000456355800035
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558202
专题	寒区旱区环境与工程研究所
通讯作者	Zhuang, Guangsheng
作者单位	1.Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Inst, Key Lab Desert & Desertificat, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Wu, Minghao,Zhuang, Guangsheng,Hou, Mingqiu,et al. Ecologic shift and aridification in the northern Tibetan Plateau revealed by leaf wax n-alkane delta H-2 and delta C-13 records[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2019,514:464-473.
APA	Wu, Minghao,Zhuang, Guangsheng,Hou, Mingqiu,&Miao, Yunfa.(2019).Ecologic shift and aridification in the northern Tibetan Plateau revealed by leaf wax n-alkane delta H-2 and delta C-13 records.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,514,464-473.
MLA	Wu, Minghao,et al."Ecologic shift and aridification in the northern Tibetan Plateau revealed by leaf wax n-alkane delta H-2 and delta C-13 records".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 514(2019):464-473.

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