| 嘉兴市春季PM、主要污染气体和气溶胶粒径分布的周末效应 |
| 摘要点击 1969 全文点击 1228 投稿时间：2015-07-07 修订日期：2015-08-03 |
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| 中文关键词 嘉兴 周末效应 污染气体 气溶胶 粒径分布 |
| 英文关键词 Jiaxing weekend effect gas pollutant aerosol size distribution |
| 作者 | 单位 | E-mail | | 沈利娟 | 嘉兴市环境保护监测站, 嘉兴 314000
南京信息工程大学环境科学与工程学院, 江苏省大气环境监测与污染控制高技术研究重点实验室, 南京 210044 | shenlijuan_428@163.com | | 王红磊 | 南京信息工程大学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-云-降水重点开放实验室, 南京 210044 | hongleiwang_2009@163.com | | 吕升 | 嘉兴市环境保护监测站, 嘉兴 314000 | | | 李莉 | 嘉兴市环境保护监测站, 嘉兴 314000 | | | 张孝寒 | 嘉兴市环境保护监测站, 嘉兴 314000 | | | 章国骏 | 嘉兴市环境保护监测站, 嘉兴 314000 | | | 王翡 | 嘉兴市环境保护监测站, 嘉兴 314000 | |
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| 中文摘要 |
| 为研究嘉兴市周末与工作日主要污染物和气溶胶粒径分布变化的差异,对2015年5月南湖区城区污染气体(SO2、NO2、CO和O3)、PM(PM10和PM2.5)和10 nm~10 μm气溶胶数浓度粒径谱分布进行了观测分析. 结果表明,嘉兴市SO2、NO2、CO和O3存在显著的周末效应,周末白天O3浓度低于工作日. O3在周末峰值出现时间为14:00,比工作日晚1 h. PM2.5的周末效应要比PM10明显. PM2.5/PM10周末为0.7,在工作日为0.6. 嘉兴市气溶胶数浓度均集中在500 nm以下,周末和工作日平均数浓度分别为16602 cm-3和23309 cm-3. 核模态粒子数浓度的周末效应最显著,核模态和粗模态粒子表面积浓度的周末效应最显著,积聚模态和粗模态粒子质量浓度的周末效应最显著. 周末和工作日气溶胶数浓度谱分布为单峰型分布,表面积浓度谱为三峰型分布,质量浓度谱为四峰型分布. |
| 英文摘要 |
| To investigate the discrepancy of distributions of major gas pollutants and aerosol size between weekdays and weekends, trace gases (SO2, NO2, CO and O3), PM (PM10 and PM2.5) and aerosol spectral distributions at 10 nm-10 μm were monitored in May 2015 at Nanhu district in Jiaxing. The results showed that the gas pollutants of SO2, NO2, CO and O3 had significant weekend effects in Jiaxing. The O3 concentration on daytime of weekends was lower than that of weekdays. The peak of O3 occurred at 14:00 on weekends, which was 1 hour later than that on weekdays. The weekend effect of PM2.5 was observed to be much more obvious compared to that of PM10. The ratios of PM2.5/PM10 were 0.7 and 0.6 on weekends and weekdays, respectively. The aerosol number concentration was mostly concentrated at particle size below 500nm, with values of 16602 cm-3 and 23309 cm-3 on weekends and weekdays. The most remarkable weekend effect was found for aerosol number concentration in nuclei mode, for surface area concentration in nuclei and coarse mode, and for mass concentration in accumulation and coarse mode. The spectra of aerosol number concentration, surface area concentration and mass concentration showed unimodal, trimodal and four-peak distributions, respectively. |
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