| 王伟齐,王章军,臧增亮,胡俊忠,张诚杰,庄全风.北京地区大气温湿廓线对气溶胶垂直分布的影响[J].装备环境工程,2019,16(6):47-54. WANG Wei-qi,WANG Zhang-jun,ZANG Zeng-liang,HU Jun-zhong,ZHANG Cheng-jie,ZHUANG Quan-feng.Effects of Atmospheric Temperature and Humidity Profiles on Vertical Distribution of Aerosols in Beijing[J].Equipment Environmental Engineering,2019,16(6):47-54. |
| 北京地区大气温湿廓线对气溶胶垂直分布的影响 |
| Effects of Atmospheric Temperature and Humidity Profiles on Vertical Distribution of Aerosols in Beijing |
| 投稿时间：2019-01-07 修订日期：2019-06-25 |
| DOI：10.7643/ issn.1672-9242.2019.06.009 |
| 中文关键词: 气溶胶消光系数 温湿廓线 PM2.5 污染条件 |
| 英文关键词:aerosol extinction coefficient temperature and humidity profiles PM2.5 pollution conditions |
| 基金项目:国家自然科学基金（41775123） |
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| Author | Institution |
| WANG Wei-qi | 1. Unit 66199 of PLA, Beijing 100041, China |
| WANG Zhang-jun | 2. Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266001, China |
| ZANG Zeng-liang | 3. Institute of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, China |
| HU Jun-zhong | 1. Unit 66199 of PLA, Beijing 100041, China |
| ZHANG Cheng-jie | 1. Unit 66199 of PLA, Beijing 100041, China |
| ZHUANG Quan-feng | 2. Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266001, China |
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| 中文摘要: |
| 目的 分析北京地区大气温湿廓线对气溶胶垂直分布的影响。方法 利用北京地区2017年9月至2018年8月每日两次（08时和20时）的气象探空、地面PM2.5浓度和气溶胶激光雷达消光系数资料，分析不同污染条件下大气温湿廓线与气溶胶消光系数廓线的关系。结果 地面PM2.5浓度和210 m气溶胶消光系数的相关系数达到0.77。春季、秋季和冬季污染条件下的近地面消光系数约是清洁条件下的5倍，夏季污染条件下的近地面消光系数约是清洁条件下的3倍。相比清洁条件下，污染条件下各季节的大气温度垂直递减率偏小，并且低层大气相对湿度偏大。结论 大气温度廓线代表大气层结稳定性，影响气溶胶的扩散高度，而相对湿度廓线与气溶胶吸湿增长密切相关，两者对气溶胶消光系数的垂直分布都有重要影响。 |
| 英文摘要: |
| Objective To analyze effects of atmospheric temperature and humidity profiles on the vertical distribution of aerosols in Beijing. Methods The relationship between atmospheric temperature and humidity profiles and aerosol extinction coefficient profiles under different pollution conditions was analyzed with meteorological sounding, ground PM2.5 concentration and aerosol lidar extinction coefficient data twice (08:00 and 20:00) a day from September 2017 to August 2018 in Beijing. Results The correlation coefficients of ground PM2.5 concentration and aerosol extinction coefficient at 210 m was 0.77. The extinction coefficient of near ground in spring, autumn and winter was about 5 times of that under clean conditions; and that under summer pollution was about 3 times of that under clean conditions. Compared with the clean conditions, the vertical decline rate of atmospheric temperature in each season under the pollution conditions was smaller; and the relative humidity in the lower atmosphere was larger. Conclusion The atmospheric temperature profile represents the stability of atmospheric stratification and affects the height of aerosol diffusion. The relative humidity profile is closely related to the aerosol hygroscopicity growth. Both have important effects on the vertical distribution of aerosol extinction coefficient. |
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