Wang Honglei, Shen Lijuan, Zhu Bin, Kang Hanqing, Hou Xuewei, Miao Qing, Yang Yang, Shi Shuangshuang
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 and Technology, Nanjing, 210044, China.
Jiaxing Environmental Monitoring Station, Jiaxing, 314000, China.
Arch Environ Contam Toxicol. 2017 May;72(4):481-495. doi: 10.1007/s00244-017-0401-1. Epub 2017 Apr 22.
The origins and spatial and temporal distributions of air pollutants (PM, PM, CO, SO, NO and O) during May to June of 2015 were investigated using data from 1490 monitoring sites in China. Aerosol number concentrations and meteorological data from Shijiazhuang, Nanjing, and Suzhou were combined with the MIX Asian emission data and the HYSPLIT model. Furthermore, the diurnal variation, size distribution, and main sources of air pollutants and aerosols were selectively characterized in the North China Plain (NCP) and the Yangtze River Delta (YRD). High values of particulate matter concentrations (PM), including PM and PM, occurred in the northwestern and central regions of eastern China. Elevated PM and PM concentrations represented natural dust sources and anthropogenic resident, power plant, industry, and traffic emissions sources, respectively. The concentrated distributions of SO were similar to those of PM. The CO concentrations were distributed uniformly in China. High O values occurred above the Qinghai province. During the observation period, the air masses mainly originated from the northwest NCP and from the southwest or northeastern ocean in the YRD, resulting in high concentrations of PM, PM, SO, and CO in the NCP, the average values of which were 61.8 ± 40.0, 118.8 ± 66.4, 24.1 ± 24.6 μg m, and 1.2 ± 0.9 mg m, respectively, and were 1.2, 1.4, 1.5, and 1.3 times larger than those in the YRD. NO had higher concentrations in the YRD with an average of 43.7 ± 24.8 μg m, which was 1.2 times larger than that in the NCP. The diurnal variations of PM, NO and CO had bimodal distributions and SO and O had unimodal distributions in the NCP and YRD. The aerosol number concentrations had average values of 12,661 ± 5266, 11,189 ± 5905, and 12,797 ± 5931 cm in Shijiazhuang, Nanjing, and Suzhou. Their diurnal variations displayed trimodal peaks at 18:00-21:00, 11:00-14:00, and 06:00-08:00, and their spectra distributions were all unimodal with peaks at 60-70, 60-70, and 100-110 nm, respectively.
利用中国1490个监测站点的数据，对2015年5月至6月期间空气污染物（PM、PM、CO、SO、NO和O）的来源以及时空分布进行了调查。将石家庄、南京和苏州的气溶胶数浓度及气象数据与亚洲MIX排放数据和HYSPLIT模型相结合。此外，还对华北平原（NCP）和长江三角洲（YRD）地区空气污染物和气溶胶的日变化、粒径分布及主要来源进行了选择性表征。包括PM和PM在内的颗粒物浓度（PM）高值出现在中国东部的西北部和中部地区。PM和PM浓度升高分别代表自然沙尘源以及人为居民、发电厂、工业和交通排放源。SO的集中分布与PM相似。CO浓度在中国分布较为均匀。O高值出现在青海省上空。在观测期内，气团主要源自华北平原西北部以及长江三角洲的西南或东北海洋，导致华北平原PM、PM、SO和CO浓度较高，其平均值分别为61.8±40.0、118.8±66.4、24.1±24.6μg m和1.2±0.9mg m，分别是长江三角洲地区的1.2倍、1.4倍、1.5倍和1.3倍。NO在长江三角洲地区浓度较高，平均值为43.7±24.8μg m，是华北平原地区的1.2倍。在华北平原和长江三角洲地区，PM、NO和CO的日变化呈双峰分布，SO和O呈单峰分布。石家庄、南京和苏州的气溶胶数浓度平均值分别为12,661±5266、11,189±5905和12,797±5931cm。它们的日变化在18:00 - 21:00、11:00 - 14:00和06:00 - 08:00呈现三峰，其谱分布均为单峰，峰值分别在60 - 70、60 - 70和A100 - 110nm。
