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Chemical characteristics, deposition fluxes and source apportionment of precipitation components in the Jiaozhou Bay, North China
Xing, Jianwei1,2; Song, Jinming1,2,3; Yuan, Huamao1,2,3; Li, Xuegang1,2,3; Li, Ning1,2,3; Duan, Liqin1,2,3; Qu, Baoxiao1,3; Wang, Qidong1,3; Kang, Xuming1,3
2017-07-01
发表期刊ATMOSPHERIC RESEARCH
卷号190页码:10-20
文章类型Article
摘要To systematically illustrate the chemical characteristics, deposition fluxes and potential sources of the major components in precipitation, 49 rainwater and snow water samples were collected in the Jiaozhou Bay from June 2015 to May 2016. We determined the pH, electric conductivity (EC) and the concentrations of main ions (Na+, K+, Ca2+, Mg2+, NH4+, SO42- ,NO3-, CI- and F-) as well as analyzed their source contributions and atmospheric transport. The results showed that the precipitation samples were severely acidified with an annual volume -weighted mean (VWM) pH of 4.77. The frequency of acid precipitation (pH < 5.6) reached up to 71.4%, and the mean EC value was relatively higher at 64.9 mu S cm(-1), all of which suggested a higher atmospheric pollution level over the Jiaozhou Bay. Surprisingly, NH4+ (40.4%), which is higher than Ca2+ (293%), is the dominant species of cations, which is different from that in most areas of China. SO42- was the most abundant anions, and accounted for 41.6% of the total anions. The wet deposition fluxes of sulfur (S) was 12.98 kg ha(-1) yr(-1). Rainfall, emission intensity and long-range transport of natural and anthropogenic pollutants together control the concentrations and wet deposition fluxes of chemical components in the precipitation. Non-sea-salt SO42- and NO3- were the primary acid components while NH4+ and non-sea-salt Ca2+ were the dominating neutralizing constituents. The comparatively lower rainwater concentration of Ca2+ in the Jiaozhou Bay than that in other regions in Northern China likely to be a cause for the strong acidity of precipitation. Based on the combined enrichment factor and correlation analysis, the integrated contributions of sea-salt, crustal and anthropogenic sources to the total ions of precipitation were estimated to be 28.7%, 14.5% and 56.8%, respectively. However, the marine source fraction of SO42- may be underestimated as the contribution from marine phytoplankton was neglected. Therefore, the precipitation components in the Jiaozhou Bay present complex chemical characteristics under the combined effects of natural changes and anthropogenic activities. (c) 2017 Elsevier B.V. All rights reserved.
关键词Precipitation Major Inorganic Ions Acid Deposition Acid Neutralization Source Contribution Jiaozhou Bay
DOI10.1016/j.atmosres2017.02.001
收录类别SCI
语种英语
WOS记录号WOS:000399631900002
引用统计
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/136702
专题海洋生态与环境科学重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China
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GB/T 7714
Xing, Jianwei,Song, Jinming,Yuan, Huamao,et al. Chemical characteristics, deposition fluxes and source apportionment of precipitation components in the Jiaozhou Bay, North China[J]. ATMOSPHERIC RESEARCH,2017,190:10-20.
APA Xing, Jianwei.,Song, Jinming.,Yuan, Huamao.,Li, Xuegang.,Li, Ning.,...&Kang, Xuming.(2017).Chemical characteristics, deposition fluxes and source apportionment of precipitation components in the Jiaozhou Bay, North China.ATMOSPHERIC RESEARCH,190,10-20.
MLA Xing, Jianwei,et al."Chemical characteristics, deposition fluxes and source apportionment of precipitation components in the Jiaozhou Bay, North China".ATMOSPHERIC RESEARCH 190(2017):10-20.
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