气候变化领域集成服务门户(CCPortal): Soluble ionic and oxygen isotopic compositions of a shallow firn profile, Baishui glacier No. 1, southeastern Tibetan Plateau

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DOI	10.3189/172756407782871648
	Soluble ionic and oxygen isotopic compositions of a shallow firn profile, Baishui glacier No. 1, southeastern Tibetan Plateau
	Pang, Hongxi; He, Yuanqing; Theakstone, Wilfred H.; Zhang, David D.
发表日期	2007
ISSN	0260-3055
起始页码	325
结束页码	+
卷号	46
英文摘要	In the summer of 2004, a firn profile, 18.3 m long, extending down to glacier ice, was recovered in the accumulation area of the largest glacier, Baishui No. 1, on Yulong mountain, the southernmost glacier-covered area in mainland Eurasia. Multivariate empirical orthogonal function (EOF) and statistical correlation analyses of major-ion data from the profile demonstrate that three distinct types of ionic material contribute to the chemical characteristics of firn in this monsoonal region: material of marine origin, which is transported by the Indian southwest monsoon; crustal materials, which come from local sources; and anthropogenic pollutants, which are produced by industrial and agricultural activities in South Asia. Although the influence of post-depositional processes on the seasonal isotopic and soluble ionic compositions is significant, dust layers in the firn profile are clearly visible. Due to the effects of meltwater percolation, the dust layers generally coincide with late-summer snow surfaces. We therefore use the dust layers, combined with the seasonal variations of electrical conductivity (EC), Ca2+ and Mg2+, to establish a depth/age scale for the firn profile. The reconstructed net accumulation has a significant negative correlation with the temperature at Lijiang, whereas the correlation between the net accumulation and the precipitation amount at Lijiang is weak. Although the 8180 time series of the firn profile was modified significantly by meltwater percolation, the correlation between annual mean 8180 values and the Indian southwest monsoon index (WSI1) is significant. This result suggests that delta O-18 records from monsoon-influenced temperate glaciers can provide a valuable record of past variations of the Indian southwest monsoon.
关键词	CENTRAL TIEN-SHAN ASIAN GLACIERS ICE CORES MONSOON AEROSOL SIGNALS PRECIPITATION HIMALAYAS REGION SNOW
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000250954200047
来源期刊	ANNALS OF GLACIOLOGY, VOL 46, 2007
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/257505
推荐引用方式 GB/T 7714	Pang, Hongxi,He, Yuanqing,Theakstone, Wilfred H.,et al. Soluble ionic and oxygen isotopic compositions of a shallow firn profile, Baishui glacier No. 1, southeastern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2007,46.
APA	Pang, Hongxi,He, Yuanqing,Theakstone, Wilfred H.,&Zhang, David D..(2007).Soluble ionic and oxygen isotopic compositions of a shallow firn profile, Baishui glacier No. 1, southeastern Tibetan Plateau.ANNALS OF GLACIOLOGY, VOL 46, 2007,46.
MLA	Pang, Hongxi,et al."Soluble ionic and oxygen isotopic compositions of a shallow firn profile, Baishui glacier No. 1, southeastern Tibetan Plateau".ANNALS OF GLACIOLOGY, VOL 46, 2007 46(2007).