Past atmospheric Pb deposition in Lake Qinghai, northeastern Tibetan Plateau
Past atmospheric Pb deposition in Lake Qinghai, northeastern Tibetan Plateau
复制标题
青藏高原东北部青海湖过去大气铅沉降
DOI：
10.1007/s10933-009-9351-6
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发表时间：
2010-03
影响因子：
2.1
通讯作者：
Chen, Li
中科院分区：
文献类型：
--
作者：
Han, Yongming;Jin, Zhangdong;Chen, Li
Two short sediment cores were recovered from sub-basins of Lake Qinghai, China and were analyzed for concentrations of Pb and 16 other elements to determine historic, regional atmospheric Pb deposition on the Tibetan Plateau. Core chronologies, dating back to the eighteenth century, were established using activities of210Pb and137Cs. The 17 elements were divided into three principal components. Variations in concentrations of PC1 elements (Al, Cr, Cu, Fe, K, Mn, Ni, and Ti) demonstrate different patterns between the two cores, and are attributed to different sediment sources in the two sub-basins. PC2 elements (Ba, Ca, Na, and Sr) may be associated with the degree of catchment weathering and/or water chemistry. Four elements (Pb, Zn, P, and Co) are related to both PC1 and PC2, and reflect a mixture of natural and anthropogenic sources. The PC3 element is Mg in the north sub-basin, and is perhaps related to aragonite precipitation and/or increased farming. Elevated Pb concentrations in uppermost sediments of both cores signify a recent regional/global increase in anthropogenic Pb release into the environment. After subtracting lithogenic Pb, derived from rock weathering and/or dust and normalized to the background immobile element Ti, results suggest that excess, anthropogenic Pb is transferred to the lake and its sediments predominantly via the atmosphere. This anthropogenic atmospheric Pb is comparable in magnitude and displays similar variation patterns in the two cores, reflecting regional atmospheric deposition and local erosion. The average anthropogenic Pb deposition rate in Lake Qinghai since the 1960s has been ~12.2 ± 3.5 mg/m2/a, comparable with atmospheric Pb fluxes reported for sites elsewhere in the northern hemisphere.
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影响因子：
5
作者：
C. Boutron;J. Candelone;Sungmin Hong
通讯作者：
C. Boutron;J. Candelone;Sungmin Hong
DOI：
10.1016/s0048-9697(02)00032-3
发表时间：
2002-06
期刊：
The Science of the total environment
影响因子：
--
作者：
I. Renberg;M. Brännvall;R. Bindler;O. Emteryd
通讯作者：
I. Renberg;M. Brännvall;R. Bindler;O. Emteryd
影响因子：
56.9
作者：
Shotyk, W;Weiss, D;Van der Knaap, WO
通讯作者：
Van der Knaap, WO
影响因子：
--
作者：
L. Zhen;Tandong Yao;Tian Lide;Baiqing Xu;Yuefang Li
通讯作者：
L. Zhen;Tandong Yao;Tian Lide;Baiqing Xu;Yuefang Li
影响因子：
2.1
作者：
D. Hammarlund;A. Mackay;D. Fallon;Gemma Pateman;Luisa C. Tavio;M. Leng;N. Rose
通讯作者：
D. Hammarlund;A. Mackay;D. Fallon;Gemma Pateman;Luisa C. Tavio;M. Leng;N. Rose