Precipitation chemistry and atmospheric nitrogen deposition at a rural site in Beijing, China
文献类型：期刊论文
| 作者 | Xu, Wen; Wen, Zhang; Shang, Bo; Dore, Anthony J.; Tang, Aohan; Xia, Xiaoping; Zheng, Aihua; Han, Mengjuan; Zhang, Lin; Zhao, Yuanhong |
| 刊名 | ATMOSPHERIC ENVIRONMENT
 |
| 出版日期 | 2020-02-15 |
| 卷号 | 223页码:1-6 |
| ISSN号 | 1352-2310 |
| 关键词 | Rainwater chemistry Nitrogen deposition Source apportionment Ammonia Air pollution |
| 英文摘要 | Precipitation chemistry and atmospheric nitrogen (N) deposition are of great concern worldwide due to their close relationships with air quality and impacts on ecosystems. However, evaluation of the chemical composition of precipitation and N deposition flux in rural areas of Beijing has received little attention to date. This paper presents the chemical constituents, possible sources and wet deposition fluxes of water-soluble ions (NH4+, NO3- SO42-, Cl-, Na+, K+, Ca2+, Mg2+) in precipitation samples collected during 2017-2018 at a rural site located at northwest of Beijing city; meanwhile, dry deposition of reactive N species (gaseous ammonia, nitrogen dioxide, nitric acid, and particulate (p) NH4+ and NO3-) were also quantified. During this 2-year period, the volume-weighted mean (VWM) pH of precipitation was 6.73, and all samples had pH values above 6.0. The VWM electric conductivity of precipitation and the mean sum of all measured ions was 43.8 mu S cm(-1) and 591.9 mu eq L-1, respectively, indicating a significant impact of atmospheric pollution. Ca2+ and NH4+ were the dominant neutralizing species for precipitation acidity. Positive matrix factorization analysis further confirmed five sources for water-soluble ions, including sea salt aging, secondary formation, agriculture, crust, and biomass burning. The annual mean wet N deposition was 4.6, 3.4 and 8.0 kg N ha(-1) yr(-1) for NH4+, NO3- and total inorganic N, respectively. The total dry N deposition was dominated by gaseous ammonia (11.5 kg N ha(-1) yr(-1)). The total N deposition (wet plus dry) was 27.7 kg N ha(-1) yr(-1), where dry deposition contributed to 75% and wet deposition 25% of the total. The simulations from the GEOS-Chem model indicate that agricultural (fertilizer use and livestock) and nonagricultural sources (industry, power plant, and transportation) are both important contributors to total N deposition. These results could be useful in evaluating/developing emission control policies to protect the eco-environment in Beijing. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44410]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Xu, Wen,Wen, Zhang,Shang, Bo,et al. Precipitation chemistry and atmospheric nitrogen deposition at a rural site in Beijing, China[J]. ATMOSPHERIC ENVIRONMENT,2020,223:1-6. |
| APA | Xu, Wen.,Wen, Zhang.,Shang, Bo.,Dore, Anthony J..,Tang, Aohan.,...&Zhang, Fusuo.(2020).Precipitation chemistry and atmospheric nitrogen deposition at a rural site in Beijing, China.ATMOSPHERIC ENVIRONMENT,223,1-6. |
| MLA | Xu, Wen,et al."Precipitation chemistry and atmospheric nitrogen deposition at a rural site in Beijing, China".ATMOSPHERIC ENVIRONMENT 223(2020):1-6. |
入库方式： OAI收割
来源：生态环境研究中心
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