| 嘉兴市不同天气条件下大气污染物和气溶胶化学组分的分布特征 |
| 摘要点击 1852 全文点击 912 投稿时间：2017-02-17 修订日期：2017-04-05 |
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| 中文关键词 天气条件 污染气体 数浓度 化学组分 日变化 |
| 英文关键词 weather conditions gaseous pollutants number concentration chemical component diurnal variation |
| 作者 | 单位 | E-mail | | 王红磊 | 南京信息工程大学气象灾害教育部重点实验室, 气候与环境变化国际合作联合实验室, 气象灾害预报预警与评估协同创新中心, 中国气象局气溶胶与云降水重点开放实验室, 南京 210044 | hongleiwang@nuist.edu.cn | | 沈利娟 | 嘉兴市环境保护监测站, 嘉兴 314000 | | | 唐倩 | 浙江省环境监测中心, 杭州 310000 | | | 吕升 | 嘉兴市环境保护监测站, 嘉兴 314000 | | | 田旭东 | 浙江省环境监测中心, 杭州 310000 | | | 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 | |
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| 中文摘要 |
| 为研究不同天气条件下大气污染物（PM2.5、PM1.0、SO2、NO2、O3和CO）和气溶胶化学组分的污染特征，分别使用SHARP-5030监测仪、热电EMS系统、气溶胶化学成分在线监测仪（ACSM）和宽范围颗粒粒径谱仪（WPS）对嘉兴市2015年5月1~31日PM、污染气体、PM1.0中化学组分和10 nm~10 μm气溶胶数浓度进行了观测分析.结果表明，观测期间嘉兴市PM2.5、PM1.0、SO2、NO2、O3和CO的平均浓度分别为52.8和37.2 μg·m-3、10.3 μg·m-3、38.1 μg·m-3、92.1 μg·m-3和1.2mg·m-3.PM1.0中OA、SO42-、NO3-、NH4+和Cl-的平均浓度为2.18、1.24、0.87、0.63和0.08 μg·m-3.数浓度主要集中在爱根核模态（20~100 nm），浓度为12411.2 cm-3，其次是核模态（10~20 nm），浓度为4946.6 cm-3.不同天气过程中PM和污染气体的浓度分布和日变化特征不同.不同天气条件下PM1.0中化学组分分布不同.雨天和晴天PM1.0中化学组分浓度从大到小顺序均为OA > SO42- > NO3- > NH4+ > Cl-，新粒子天PM1.0中化学组分浓度的顺序为OA > NO3- > SO42- > NH4+ > Cl-.新粒子天OA和NO3-分别是晴天的1.61和1.42倍，说明OA和NO3-是影响新粒子生成事件的主要化学成分.不同天气条件下不同模态气溶胶的日变化特征不同. |
| 英文摘要 |
| Distribution characteristics of air pollutants and aerosol chemical components under different weather conditions were investigated in Jiaxing between May 1 and 31, 2015. The particulate matter (PM), gaseous pollutants, chemical components in PM1.0, and aerosol number concentrations ranging from 10 nm to 10 μm were measured using the SHARP-5030 monitoring instrument, Thermo EMS system, Aerodyne Aerosol Chemical Speciation Monitor (ACSM), and Wide-Range Particle Spectrometer (WPS), respectively. The average concentrations of PM2.5, PM1.0, SO2, NO2, O3, and CO were 52.8 μg·m-3, 37.2 μg·m-3, 10.3 μg·m-3, 38.1 μg·m-3, 92.1 μg·m-3, and 1.2 mg·m-3 during the observation period. The chemical components of OA, SO42-, NO3-, NH4+, and Cl-in PM1.0 had average concentrations of 2.18, 1.24, 0.87, 0.63, and 0.08 μg·m-3, respectively. The aerosol number concentrations were mainly centralized in Aitken mode (20-100 nm), with a value of 12411.2 cm-3. The nuclei mode aerosols (10-20 nm) followed the number concentrations with 4946.6 cm-3. The concentration distributions and diurnal variations of PM and gaseous pollutants, and the distributions of chemical components of PM1.0 varied under different weather conditions. The concentrations of chemical components were ranked in the order of OA > SO42- > NO3- > NH4+ > Cl- on rainy days and sunny days, and in the order of OA > NO3- > SO42- > NH4+ > Cl- on new particle formation (NPF) days. The OA and NO3- concentrations on NPF days were 1.61 and 1.42 times larger than those on sunny days, suggesting that the components of OA and NO3- were the main substances influencing the NPF events. Additionally, the diurnal variations of aerosols in different modes varied under different types of weather conditions. |
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