2010年1月北京城区大气消光系数重建及其贡献因子; Reconstructed Ambient Light Extinction Coefficient and Its Contribution Factors in Beijing in January, 2010 | |
朱李华 ; 陶俊 ; 陈忠明 ; 赵岳 ; 张仁健 ; 曹军骥 | |
刊名 | 环境科学
![]() |
2012 | |
关键词 | PM2.5 PM2.5 aerosol chemical compositions extinction coefficient reconstruction contribution factors 化学组分 消光系数 重建 贡献因子 |
英文摘要 | 于2010年1月1~31日在北京城区每天采集PM2.5样品. 利用热光碳分析仪、离子色谱和X荧光光谱仪分别分析样品中有机碳/元素碳、水溶性离子和土壤元素,同步收集了大气散射系数(bsp)、吸收系数(bap)和气象数据. 利用IMPROVE方程重建大气消光系数,并与实测大气消光系数进行对比.结果发现,PM2.5日均值质量浓度为(144.3±89.1)μg· m-3,实测值bap、bsp和消光系数(bext)分别为(67.4±54.3)、(328.5±353.8)和(395.9±405.2)Mm-1. IMPROVE方程适用于观测期间北京大气消光系数的解析. 观测期间计算值b'ext均值为(611±503)Mm-1,(NH4)2SO4、NH4NO3、OM、EC和FS对b'ext的贡献分别为24.6%、11.6%、45.5%、11.9%和6.4%.; Aerosol samples for PM2.5 were collected from 1st January to 31st January 2010, in Beijing. The concentrations of organic carbon, elemental carbon, water-solubile ions and soil elements of all particle samples were determined by thermal/optical carbon analyzer,ion chromatography and X-ray fluorescence spectrometer, respectively. The scattering coefficients (bsp), absorbing coefficients (bap) and meteorological parameters for this period were also measured. Ambient light extinction coefficients were reconstructed by IMPROVE formula and were compared with measured light extinction coefficients. The results showed that the average mass concentration of PM2.5 was (144.3±89.1) μg· m-3 during campaigning period. The average values of measured bap, bsp and extinction coefficient (bext) were (67.4±54.3), (328.5±353.8) and (395.9±405.2) Mm-1, respectively. IMPROVE formula is suitable for source apportionment of light extinction coefficient in campaign period. The average value of calculated b'ext was (611±503) Mm-1 in January, 2010. The major contributors to ambient light extinction coefficients included (NH4)2SO4(24.6%), NH4NO3(11.6%), OM(45.5%), EC(11.9%) and FS (6.4%), respectively.; 国家环境保护公益性行业科研专项; 国家重点基础研究发展规划(973)项目; 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 0; 1; 13-19; 33 |
语种 | 中文 |
内容类型 | 期刊论文 |
源URL | [http://ir.pku.edu.cn/handle/20.500.11897/271145] ![]() |
专题 | 环境科学与工程学院 |
推荐引用方式 GB/T 7714 | 朱李华,陶俊,陈忠明,等. 2010年1月北京城区大气消光系数重建及其贡献因子, Reconstructed Ambient Light Extinction Coefficient and Its Contribution Factors in Beijing in January, 2010[J]. 环境科学,2012. |
APA | 朱李华,陶俊,陈忠明,赵岳,张仁健,&曹军骥.(2012).2010年1月北京城区大气消光系数重建及其贡献因子.环境科学. |
MLA | 朱李华,et al."2010年1月北京城区大气消光系数重建及其贡献因子".环境科学 (2012). |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论