气候变化领域集成服务门户(CCPortal): Hf-Nd-Sr Isotopic Composition as Fingerprint for Long-Range Transported Eolian Dust Deposition in Glacier Snowpack of Eastern Tibetan Plateau

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DOI	10.1029/2018JD028581
	Hf-Nd-Sr Isotopic Composition as Fingerprint for Long-Range Transported Eolian Dust Deposition in Glacier Snowpack of Eastern Tibetan Plateau
	Dong, Zhiwen; Shao, Yaping; Qin, Dahe; Kang, Shichang; Wei, Ting; Wang, Xuejia; Wang, Shijin
发表日期	2018
ISSN	2169-897X
EISSN	2169-8996
卷号	123 期号:13
英文摘要	This study presents the Hf-Nd-Sr isotopic compositions of eolian dust deposited on glacier snowpacks along a longitude transect on the eastern Tibetan Plateau, in order to trace its source areas and the provenance of long-range transported (LRT) Asian dust on the eastern margin of Tibetan Plateau. Most of the glacier snowpack samples from northern locations (Qiyi and Lenglongling Glaciers) indicated similar Hf-Nd-Sr isotopic ratios with that of large central Asian deserts. However, the southern locations (Dagu, Hailuogou, and Baishui Glaciers) showed dramatic difference in the Hf-Nd-Sr isotopic ratios of snowpack dust compared with those of large Asian deserts, but were more similar to that of Tibetan Plateau surface crust. Hf-Nd isotopes indicated that the southern Tibetan Plateau locations are hardly influenced by central Asian dust, but probably influenced by southward dust transport from the Loess Plateau, in addition to the arid deserts on the Tibetan Plateau surface. Meteorological data and aerosol optical depth also demonstrated the potential differences of eolian dust transport and input between the north and south locations. Loess Plateau is even in today's climate a dust sink, but dust emission from the Loess Plateau is also possible. The influence of the Tibetan Plateau and southwest vortex of China to atmospheric circulation may have caused such eolian transport, in particular for LRT eolian dust transport to southeastern Tibetan Plateau glaicers. This study is also of importance in that the Hf-Nd isotopic fingerprinting could provide new evidences for LRT dust deposition on the Tibetan Plateau. Plain Language Summary This study is aimed to examine the spatial variation of eolian dust transport and deposition in the eastern margin of Tibetan Plateau, for which the sources and provenance of the dust deposited in high elevation glaciers have not been investigated. The dust transport route is also important for understanding regional atmospheric circulation and climate. This study is thus intended to provide a better understanding of long-range transported dust transport and dust deposition on the eastern margin of Tibetan Plateau. Hf-Nd isotopic fingerprinting is used to provide new evidence for tracing long-range transported dust in high mountain glaicers when compared with Nd-Sr isotopes.
关键词	snowpack dust Hf-Nd-Sr isotopes Asian dust southwest vortex of China eastern Tibetan Plateau margin
学科领域	Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111954
作者单位	Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryosphere Sci, Lanzhou, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Dong, Zhiwen,Shao, Yaping,Qin, Dahe,et al. Hf-Nd-Sr Isotopic Composition as Fingerprint for Long-Range Transported Eolian Dust Deposition in Glacier Snowpack of Eastern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2018,123(13).
APA	Dong, Zhiwen.,Shao, Yaping.,Qin, Dahe.,Kang, Shichang.,Wei, Ting.,...&Wang, Shijin.(2018).Hf-Nd-Sr Isotopic Composition as Fingerprint for Long-Range Transported Eolian Dust Deposition in Glacier Snowpack of Eastern Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(13).
MLA	Dong, Zhiwen,et al."Hf-Nd-Sr Isotopic Composition as Fingerprint for Long-Range Transported Eolian Dust Deposition in Glacier Snowpack of Eastern Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.13(2018).