Identifying the change in atmospheric sulfur sources in China using isotopic ratios in mosses

	Identifying the change in atmospheric sulfur sources in China using isotopic ratios in mosses
	Hua-Yun Xiao; Cong-Guo Tang; Hong-Wei Xiao; Xue-Yan Liu; Cong-Qiang Liu
	2009
发表期刊	Journal of Geophysical Research Atmospheres
卷号	114 期号:D16 页码:4723-4734
摘要	A considerable number of studies on rainwater sulfur isotopic ratios (d34Srain) have been conducted to trace sulfur sources at a large number of sites in the past. If longitudinal studies on the isotope composition of precipitation sulfate were conducted, it is possible to relate that to changes in sulfur emissions. But direct measurement needs considerable labor and time. So, in this study, sulfur isotopic ratios in rainwater and mosses were analyzed at Guiyang and Nanchang to evaluate the possibility of using mosses as a substitute for rainwater. We found that present moss sulfur isotopic ratios were comparable to those of present rainwater. Additionally, we investigated the changes of atmospheric sulfur sources and sulfur concentrations using an isotopic graphic analysis at five industrial cities, two forested areas, and two remote areas in China. Mosses in industrial cities show a wide range of d34S values, with the highest occurring at Chongqing (+3.9%) and the lowest at Guiyang (3.1%). But as compared to those in forested and remote areas, d34S values of mosses in all the five industrial cities are lower. On the basis of isotopic comparisons between past rainwater (reported in the literature) and present mosses, in the plot of d34Smoss versus d34Srain, six zones indicating different atmospheric sulfur change are separated by the 1:1 line and d34S values of potential sulfur sources. Our results indicate that atmospheric sulfur pollution in most of the industrial cities decreased, while at the two forested areas, no significant changes were observed, and a new anxiousness coming from new energy sources (e.g., oil) appeared in some cities. Studies on the change of ambient SO2 concentrations support these results.
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/6749
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Hua-Yun Xiao,Cong-Guo Tang,Hong-Wei Xiao,et al. Identifying the change in atmospheric sulfur sources in China using isotopic ratios in mosses[J]. Journal of Geophysical Research Atmospheres,2009,114(D16):4723-4734.
APA	Hua-Yun Xiao,Cong-Guo Tang,Hong-Wei Xiao,Xue-Yan Liu,&Cong-Qiang Liu.(2009).Identifying the change in atmospheric sulfur sources in China using isotopic ratios in mosses.Journal of Geophysical Research Atmospheres,114(D16),4723-4734.
MLA	Hua-Yun Xiao,et al."Identifying the change in atmospheric sulfur sources in China using isotopic ratios in mosses".Journal of Geophysical Research Atmospheres 114.D16(2009):4723-4734.

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