引用本文:
周焱博, 竺夏英, 潘月鹏, 田世丽, 刘全, 孙扬, 安俊琳, 王跃思. 城市近地层气态污染物的垂直分布特征[J]. 环境化学, 2017, 36(8): 1752-1759
ZHOU Yanbo, ZHU Xiaying, PAN Yuepeng, TIAN Shili, LIU Quan, SUN Yang, AN Junlin, WANG Yuesi. Vertical distribution of gaseous pollutants in the lower atmospheric boundary layer in urban Beijing[J]. Environmental Chemistry, 2017, 36(8): 1752-1759

城市近地层气态污染物的垂直分布特征
周焱博1,2, 竺夏英3, 潘月鹏2, 田世丽2, 刘全4, 孙扬2, 安俊琳1, 王跃思2
1. 南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与 评估协同创新中心/中国气象局气溶胶与云降水重点开放实验室, 南京, 210044;
2. 中国科学院大气物理研究所 LAPC, 北京, 100029;
3. 国家气候中心, 北京, 100081;
4. 北京市气象局, 北京, 100089
摘要:
为研究大气污染物在近地层内的垂直分布规律,2009年2月10-25日利用被动采样器在北京325 m气象铁塔10个高度(8、15、47、80、120、160、200、240、280、320 m)对SO2、NO2、O3、NH3和苯系物(苯benzene、甲苯toluene、乙苯ethylbenzene和二甲苯xylene)共8种大气污染物浓度进行了同步观测.结果表明,北京城区冬季污染物浓度具有明显的垂直变化特征,污染物浓度从近地面开始逐渐上升,在80-160 m以内的某一高度到达峰值后逐渐下降;200-300 m范围内,大气污染物浓度的垂直变化幅度相对较小,浓度值与地面接近;200 m以下各种污染物浓度的变化比较剧烈,浓度极大值出现的高度有所不同,O3、SO2和NH3极大值位于160 m,苯和NO2极大值出现在120 m,甲苯、乙苯和二甲苯极大值在80 m处.污染物在不同高度富集可能与污染源排放高度、城市冠层的热动力作用和气象因素有关,区分这些因素的各自贡献尚需进一步研究.
关键词:    气态污染物    城市边界层    垂直分布    逆温层    北京   
Vertical distribution of gaseous pollutants in the lower atmospheric boundary layer in urban Beijing
ZHOU Yanbo1,2, ZHU Xiaying3, PAN Yuepeng2, TIAN Shili2, LIU Quan4, SUN Yang2, AN Junlin1, WANG Yuesi2
1. Key Laboratory of Meteorological Disaster, Ministry of Education(KLME), Joint International Research Laboratory of Climate and Environment Change(ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing, 210044, China;
2. LAPC, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China;
3. National Climate Centre, Beijing, 100081, China;
4. Beijing Meteorological Service, Beijing, 100089, China
Abstract:
To examine the vertical distribution of air pollutants in the lower atmospheric boundary layer, the concentrations of SO2, NO2, O3, NH3 and BTEX (benzene, toluene, ethylbenzene and xylene) were measured simultaneously by passive samplers on a 325 m meteorological tower at ten heights(8,15,47,80,120,160,200,240,280 and 320 m), during February 10-25, 2009 in urban Beijing. The results show that the highest concentration of aforementioned air pollutants along the vertical profile was always observed at 80-160 m height, decreasing toward the surface and toward higher altitudes. The concentrations of these pollutants between 200-300 m varied insignificantly, with values close to those at the surface. In contrast, the concentrations of these pollutants changed dramatically below 200 m, with the maximum values at 160 m for O3, SO2 and NH3; at 120 m for benzene and NO2; and at 80 m for toluene, ethylbenzene and xylene. The elevated concentrations of gaseous pollutants coincided with the inversion layer and were likely influenced by the emission heights of point sources and the meteorological conditions, as well as the dynamic and thermal effects of urban canopy combined. The individual contribution of these factors needs to be separated in future work.
Key words:    gaseous pollutants    urban boundary layer    vertical distribution    inversion layer    Beijing   
收稿日期: 2016-12-07
基金项目: 国家自然科学基金(41405144),国家重点研发计划专项(2016YFD0800302,2016YFC0201802,2017YFC0210103)和北京市科委科技创新中心建设战略研究及专家咨询专项研究课题(Z171100003217064)资助.
潘月鹏,E-mail:panyuepeng@mail.iap.ac.cn
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