| 南京市降水化学特征及其来源研究 |
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| 引用本文： | 张泽锋,沈利娟,朱彬,岳江,王红磊,张秋晨.南京市降水化学特征及其来源研究[J].大气科学学报,2015,38(4):473-482. |
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| 作者姓名： | 张泽锋 沈利娟 朱彬 岳江 王红磊 张秋晨 |
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| 作者单位： | 南京信息工程大学 中国气象局气溶胶云降水重点开放实验室, 江苏 南京 210044;南京信息工程大学 中国气象局气溶胶云降水重点开放实验室, 江苏 南京 210044;嘉兴市环境保护监测站, 浙江 嘉兴 314000;南京信息工程大学 中国气象局气溶胶云降水重点开放实验室, 江苏 南京 210044;山西省气象科学研究所, 山西 太原 030002;南京信息工程大学 中国气象局气溶胶云降水重点开放实验室, 江苏 南京 210044;南京信息工程大学 中国气象局气溶胶云降水重点开放实验室, 江苏 南京 210044 |
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| 基金项目： | 国家自然科学基金资助项目(41005071);江苏省高校自然科学研究计划项目(10KJB610008);江苏高校优势学科建设工程资助项目(PAPD);教育部留学回国人员科研启动基金资助项目 |
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| 摘 要： | 为了解南京江北地区降水化学特征,分析了2011年3—6月共25个降水日的109个降水样品中的主要水溶性离子,并利用后向轨迹模式探讨了降水气团来源.结果表明:1)南京地区3—6月降水主要受南、北2种气团影响,北方气团降水的主要离子浓度高于南方气团降水.2)海盐示踪法和相关性分析显示,降水中NO3-和SO42-主要来自燃煤、工业排放和汽车尾气;Ca2+主要来自地壳源;Cl-主要来自海洋;海洋源和陆源对Mg2+和K+都有贡献,Mg2+的陆源贡献大于海洋源贡献,K+受海洋源的影响程度要低于Mg2+.3)南、北气团初期降水的各离子浓度高于总降水的各离子浓度,且初期降水的主要离子的富集系数高于总降水.这说明在降水初始阶段,雨水对南京大气中污染物(气态污染物和颗粒物)的云下冲刷去除作用较强,降水的离子浓度最高,局地源对降水离子的贡献较明显.
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| 关 键 词： | 降水化学 后向轨迹 海盐示踪法 相关性分析 |
| 收稿时间： | 2014/1/2 0:00:00 |
| 修稿时间： | 2015/5/8 0:00:00 |
Chemical characteristics and potential sources of precipitation in Nanjing |
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| ZHANG Ze-feng,SHEN Li-juan,ZHU Bin,YUE Jiang,WANG Hong-lei and ZHANG Qiu-chen.Chemical characteristics and potential sources of precipitation in Nanjing[J].大气科学学报,2015,38(4):473-482. |
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| Authors: | ZHANG Ze-feng SHEN Li-juan ZHU Bin YUE Jiang WANG Hong-lei and ZHANG Qiu-chen |
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| Institution: | Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, NUIST, Nanjing 210044, China;Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, NUIST, Nanjing 210044, China;Jiaxing Environmental Protection and Monitoring Station, Jiaxing 314000, China;Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, NUIST, Nanjing 210044, China;Shanxi Institute of Meteorological Sciences, Taiyuan 030002, China;Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, NUIST, Nanjing 210044, China;Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, NUIST, Nanjing 210044, China |
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| Abstract: | Total 109 precipitation samples were collected in north suburb of Nanjing from March to June 2011.In order to investigate the chemistry characteristics of precipitation,the concentration of water-soluble ions were analyzed and the air mass sources of precipitation were also discussed using the back trajectory model.Results show that the precipitation is mainly controlled by southern and northern air masses,and the concentrations of major ions from precipitation of northern air masses are higher than those from southern.The sea salt tracer method and the correlation analysis indicate that NO3- and SO42- are mainly from coal burning,industrial emissions and vehicle exhaust emissions.Ca2+ and Cl- mainly derive from crustal and marine sources,respectively.K+ and Mg2+ are both from marine and terrestrial sources,while the terrestrial contribution of Mg2+ is dominant,and the impact of marine on K+ is lower than on Mg2+.Due to the scavenging process,the concentrations of different ions and the enrichment factors of main ions in the early period of precipitation are higher than those in the whole period of precipitation,which are attributed to the main contribution of local pollution sources. |
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| Keywords: | precipitation chemistry back trajectory sea salt tracer method correlation analysis |
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