Wang Hong-Lei, Shen Li-Juan, Tang Qian, Lü Sheng, Tian Xu-Dong, Li Li, Zhang Xiao-Han
Key Laboratory of Meteorological Disaster, Ministry of Education(KLME), Joint International Research Laboratory of Climate and Environment Change(ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China.
Jiaxing Environmental Monitoring Station, Jiaxing 314000, China.
Huan Jing Ke Xue. 2017 Sep 8;38(9):3594-3604. doi: 10.13227/j.hjkx.201702093.
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 PM, 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 PM, PM, SO, NO, O, and CO were 52.8 μg·m, 37.2 μg·m, 10.3 μg·m, 38.1 μg·m, 92.1 μg·m, and 1.2 mg·m during the observation period. The chemical components of OA, SO, NO, NH, and Clin PM had average concentrations of 2.18, 1.24, 0.87, 0.63, and 0.08 μg·m, respectively. The aerosol number concentrations were mainly centralized in Aitken mode (20-100 nm), with a value of 12411.2 cm. The nuclei mode aerosols (10-20 nm) followed the number concentrations with 4946.6 cm. The concentration distributions and diurnal variations of PM and gaseous pollutants, and the distributions of chemical components of PM varied under different weather conditions. The concentrations of chemical components were ranked in the order of OA > SO > NO > NH > Cl on rainy days and sunny days, and in the order of OA > NO > SO > NH > Cl on new particle formation (NPF) days. The OA and NO concentrations on NPF days were 1.61 and 1.42 times larger than those on sunny days, suggesting that the components of OA and NO were the main substances influencing the NPF events. Additionally, the diurnal variations of aerosols in different modes varied under different types of weather conditions.
2015年5月1日至31日期间，对嘉兴不同天气条件下空气污染物和气溶胶化学成分的分布特征进行了调查。分别使用SHARP - 5030监测仪、Thermo EMS系统、Aerodyne气溶胶化学形态监测仪（ACSM）和宽范围粒子光谱仪（WPS）测量了颗粒物（PM）、气态污染物、PM中的化学成分以及粒径范围为10纳米至10微米的气溶胶数浓度。观测期间，PM、PM、SO、NO、O和CO的平均浓度分别为52.8微克·立方米、37.2微克·立方米、10.3微克·立方米、38.1微克·立方米、92.1微克·立方米和1.2毫克·立方米。PM中OA、SO、NO、NH和Cl的化学成分平均浓度分别为2.18、1.24、0.87、0.63和0.08微克·立方米。气溶胶数浓度主要集中在爱根核模态（20 - 100纳米），数值为12411.2立方厘米。核模态气溶胶（10 - 20纳米）的数浓度次之，为4946.6立方厘米。不同天气条件下，PM和气态污染物的浓度分布及日变化，以及PM化学成分的分布均有所不同。雨天和晴天化学成分浓度排序为OA > SO > NO > NH > Cl，新粒子生成（NPF）日排序为OA > NO > SO > NH > Cl。NPF日的OA和NO浓度分别是晴天的1.61倍和1.42倍，表明OA和NO的成分是影响NPF事件的主要物质。此外，不同天气条件下不同模态气溶胶的日变化也有所不同。
