Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, China.
Key Lab of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
Ecotoxicol Environ Saf. 2021 Sep 1;220:112329. doi: 10.1016/j.ecoenv.2021.112329. Epub 2021 May 18.
Studying the characteristics of new particle formation (NPF) is conducive to exploring the impact of atmospheric particulate matter on the climate, environment, and human health. The particle number size distributions (5.6-560 nm) of aerosols were measured using a fast mobility particle sizer (FMPS) from 1 to 11 May 2019. The clean atmosphere was one of the basic conditions for the occurrence of this continuous new particle formation events. It started between 9:00 and 12:00, and it mainly ended after 20:00. The growth rate (GR) and condensation sink (CS) values in Hefei were 2.98 ± 0.97 nm·h and (3.0 ± 0.4) × 10 s, respectively. Back trajectory clustering analysis revealed that the mass concentration of the air masses from the southeastern part of Henan Province and the southern part of Anhui Province surrounding the study area were relatively high. The analysis results of the potential source contribution function (PSCF) and the concentration weighted trajectory (CWT) methods show that in addition to local pollution, the long-distance transport of pollutants in the Yangtze River Delta (YRD) greatly contributed to the accumulation modal particulate concentration in Hefei. Moreover, the population affected by PM during the observation period reached 8.19 × 10, accounting for 1.08% to the total population in Hefei. The premature death cases associated with PM reached 8.35 × 10. This study is helpful to understand the main influencing factors of consecutive NPF events and the health risks of fine particles.
研究新粒子形成（NPF）的特征有助于探索大气颗粒物对气候、环境和人类健康的影响。使用快速迁移率颗粒尺寸分析仪（FMPS）测量了 2019 年 5 月 1 日至 11 日气溶胶的粒子数浓度粒径分布（5.6-560nm）。清洁的大气是连续新粒子形成事件发生的基本条件之一。它始于 9:00 至 12:00 之间，主要在 20:00 之后结束。合肥的生长率（GR）和凝结汇（CS）值分别为 2.98±0.97nm·h和（3.0±0.4）×10 s。后向轨迹聚类分析表明，来自研究区域东南部的河南省和安徽省南部的空气团的质量浓度相对较高。潜在源贡献函数（PSCF）和浓度加权轨迹（CWT）方法的分析结果表明，除了本地污染外，长三角（YRD）污染物的远距离输送对合肥积累模态颗粒物浓度的贡献很大。此外，在观测期间，受 PM 影响的人口达到 8.19×10，占合肥总人口的 1.08%。与 PM 相关的过早死亡人数达到 8.35×10。本研究有助于了解连续 NPF 事件的主要影响因素和细颗粒物的健康风险。
