气候变化领域集成服务门户(CCPortal): Spatial patterns of soil n-alkane delta D values on the Tibetan Plateau: Implications for monsoon boundaries and paleoelevation reconstructions

CCPortal

DOI	10.1029/2012JD017803
	Spatial patterns of soil n-alkane delta D values on the Tibetan Plateau: Implications for monsoon boundaries and paleoelevation reconstructions
	Bai, Yan; Fang, Xiaomin; Tian, Qian
通讯作者	Fang, XM (通讯作者)
发表日期	2012
ISSN	2169-897X
卷号	117
英文摘要	Between 2010 and 2011, this project collected and analyzed forty-nine superficial soil samples, for wax-derived n-alkane delta D values (delta D-wax), along a south to north transect of the Tibetan Plateau, from the southern Plateau and Nepalese Himalayas, passing through the Nam Co basin, to Qilian Mountains. Twenty-two paired river water samples were also collected from northeastern Tibet during this period and analyzed for delta D (delta D-RW). The delta D-RW and delta D-wax values become progressively more negative northward from similar to 27.5 degrees N, and reach a minimum at similar to 30.6 degrees N (Nam Co basin). North of the Nam Co basin, to 35 degrees N, isotope values increase, due to increasing contributions from the year-round westerlies and recycled moisture from the Plateau. Relatively high and constant delta D-wax and delta D-RW values prevail in areas north of similar to 35 degrees N in northeastern Tibet. Results show that these delta D-wax values vary considerably with location and relate closely to the influences of the summer monsoon and circulation changes. These changes track the spatial variability of isotopes from modern river water and precipitation at large spatial scales. Paleoelevation reconstructions should take into account the impact of mixing between continental and monsoon-derived moisture on the relationships with elevation and delta D-wax (and linear isotopic lapse rates) for central northeastern Tibet. Based on extended and more sensitive (relative to delta O-18) delta D-wax and delta D-RW values, we infer that in the past the westerlies reached further south, to the north piedmont of the Nyainqentanglha Range, and that Indian Summer Monsoon moisture pushes across the Tanggula Mountains and approaches the Kunlun Mountains.
关键词	HYDROGEN ISOTOPE RATIOS VS. ALTITUDE GRADIENTS SURFACE SEDIMENT STABLE-ISOTOPES MOISTURE ORIGIN NAM CO PRECIPITATION WATER CHINA PALEOALTIMETRY
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000310342500004
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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/258012
推荐引用方式 GB/T 7714	Bai, Yan,Fang, Xiaomin,Tian, Qian. Spatial patterns of soil n-alkane delta D values on the Tibetan Plateau: Implications for monsoon boundaries and paleoelevation reconstructions[J]. 中国科学院青藏高原研究所,2012,117.
APA	Bai, Yan,Fang, Xiaomin,&Tian, Qian.(2012).Spatial patterns of soil n-alkane delta D values on the Tibetan Plateau: Implications for monsoon boundaries and paleoelevation reconstructions.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,117.
MLA	Bai, Yan,et al."Spatial patterns of soil n-alkane delta D values on the Tibetan Plateau: Implications for monsoon boundaries and paleoelevation reconstructions".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 117(2012).