| 天津2011年秋冬季PM2.5组分特征及其对能见度的影响 |
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| 引用本文： | 刘爱霞,韩素芹,姚青,张敏,蔡子颖.天津2011年秋冬季PM2.5组分特征及其对能见度的影响[J].气象与环境学报,2013,29(2):42-47. |
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| 作者姓名： | 刘爱霞 韩素芹 姚青 张敏 蔡子颖 |
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| 作者单位： | 天津市气象科学研究所，天津 300074 |
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| 基金项目： | 环保公益性行业科研专项(201009001-4);天津市科委基金项目(10JCYBJC05800)共同资助 |
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| 摘 要： | 利用2011年能见度、相对湿度、风速逐时观测资料和11月16日至12月13日期间颗粒物膜采样数据，分析天津市大气能见度与PM2.5组分的关系。结果表明：天津颗粒物质量浓度与能见度变化总体呈负相关，PM2.5和相对湿度对能见度的影响作用明显。能见度与颗粒物中TC质量浓度变化呈负相关，SO42-,NO3-,OC和EC是影响大气能见度的主要组分，其中SO42-浓度对能见度影响最大，其次为OC浓度、EC浓度，NO3-浓度对能见度的影响相对较小。后向轨迹和混合层高度分析表明，气象条件是造成PM2.5质量浓度分布差异的重要原因。
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| 关 键 词： | 大气能见度 相对湿度 PM2.5 水溶性离子 碳组分 |
Characteristics of chemical composition of PM2. 5 and its effect on visibility in autumn and winter of 2011 in Tianjin |
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| LIU Ai-xia,HAN Su-qin,YAO Qing,ZHANG Min,CAI Zi-ying.Characteristics of chemical composition of PM2. 5 and its effect on visibility in autumn and winter of 2011 in Tianjin[J].Journal of Meteorology and Environment,2013,29(2):42-47. |
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| Authors: | LIU Ai-xia HAN Su-qin YAO Qing ZHANG Min CAI Zi-ying |
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| Institution: | Tianjin Institute of Meteorological Science, Tianjin 300074, China |
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| Abstract: | Based on the hourly visibility and relative humidity as well as wind speed data in 2011, particulate sam- ple data from November 16 to December 13,2011, the relationship between the visibility and chemical composition of PM2. 5 was analyzed in Tianjin. The results indicate that the visibility has a negative correlation with the mass concentration of the particulate, and PM2.5 and relative humidity plays a major role in the poor visibility. Atmos- pheric visibility also has a significantly negative correlation with the mass concentration of the total carbon （TC）. The SO42- , NO3-, OC and EC are the key factors influencing the visibility, especially the SO42- , then the OC and EC, while the effect of the NO3- is relatively small. The simulations of the backward trajectory and analysis of the mixed layer height have shown that the heavy PM2.5 pollution during the observational period is mainly caused by meteorological conditions. |
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| Keywords: | Atmospheric visibility Relative humidity PM2 5 Water-soluble iron Carbon composition |
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