| 北京大气细粒子及其成分的浓度变化特征 |
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| 引用本文： | 任希岩,吉东生,王跃思,胡波,孙扬.北京大气细粒子及其成分的浓度变化特征[J].地球信息科学,2008,10(4):426-430. |
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| 作者姓名： | 任希岩 吉东生 王跃思 胡波 孙扬 |
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| 作者单位： | 1. 中国科学研究院大气物理研究所, 北京 100029;
2. 中国城市规划设计研究院, 北京 100037 |
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| 基金项目： | 国家重点基础研究发展计划
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国家高技术研究发展计划
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北京及周边地区奥运大气环境监测和预警联合行动计划-2008 |
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| 摘 要： | 硫酸盐、硝酸盐是城市的大气细粒子重要组成部分之一。本文利用RCFP仪器针对北京市2004～2007年北京大气细粒子的成分进行了连续的观测与分析发现,硝酸盐年平均下降率为7%,约合0.7微克/立方米;而硫酸盐浓度从2006年的28微克/立方米下降到了18微克/立方米。同时特别分析了2007年8月17日至20日机动车限行期间,北京及周边地区区域气象特征、细颗粒污染物浓度特征,及其主要化学成分的特征,并参照反向轨迹演算发现以硫酸盐为表征的北京周边地区污染物随弱南向气团向北京输移,以湿气团和氯离子为共同表征的东南海陆特性气团随东南气流向北京输移,从而证明偏南气流将北京周边地区的细颗粒物污染物输移向北京的特征。
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| 关 键 词： | 大气观测 大气细颗粒物 北京及周边地区 大气污染 |
| 收稿时间： | 2008-06-01; |
The Characteristics of the Concentrations of Fine Particles and Their Composition in Beijing |
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| REN Xiyan,JI Dongsheng,WANG Yuesi,HU Bo,SUN Yang.The Characteristics of the Concentrations of Fine Particles and Their Composition in Beijing[J].Geo-information Science,2008,10(4):426-430. |
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| Authors: | REN Xiyan JI Dongsheng WANG Yuesi HU Bo SUN Yang |
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| Institution: | 1. Institute of Atmospheric Physics, CAS, Beijing 100029, China;
2. China academy of urban planning & design, Beijing 100037, China |
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| Abstract: | Sulfate and nitrate are the main components of fine particles in the urban atmosphere.Utilizing the rapid collection of atmospheric particles and the chemical component in line analysis system,the concentrations of sulfate and nitrate in fine particles from 2004 to 2007 in Beijing were observed.The results show that the average decline rate of nitrate is 7 %,about 0.7μg/m3,and the concentrations of sulfate declined from 28μg/m3 in 2006 to 18μg/m3 in 2007.There is a special analysis on regional meteorological characteristics,the characteristics of the concentrations of fine particles pollution,and the main chemical components of fine particles in the surrounding areas of Beijing from August 17 to 20 in 2007 when Beijing began a four-day test scheme to take 1.3m vehicles off the city's roads.The variations of the concentrations of sulfate and chloride combined with the backward trajectory calculations show that as the tracer of the pollutants in the surrounding areas of Beijing,the sulfate moves to Beijing with the weak south air mass,and as the tracer of sea air mass of south east China Sea,the wet air mass and chloride moves to Beijing with the airflow from south east.It proves that the south air mass helps tp transport the fine particles in the surrounding areas of Beijing to Beijing. |
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| Keywords: | atmospheric observation fine particles Beijing and its surrounding areas air pollution |
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