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Key characteristics of new particle formation events occurring simultaneously in the Yangtze River Delta and northeast rural sites in China
Atmospheric Environment ( IF 5 ) Pub Date : 2024-02-22 , DOI: 10.1016/j.atmosenv.2024.120406 Shuo Liu , Peng Wang , Qainli Ma , Xiaojing Shen , Kang Hanqing , Junying Sun , Quan Liu , Yangmei Zhang , Muzhen Shi , Dajiang Yu , Junting Zhong , Xinyao Hu , Jiayuan Lu , Aoyuan Yu , Huizheng Che , Xiaoye Zhang
Atmospheric Environment ( IF 5 ) Pub Date : 2024-02-22 , DOI: 10.1016/j.atmosenv.2024.120406 Shuo Liu , Peng Wang , Qainli Ma , Xiaojing Shen , Kang Hanqing , Junying Sun , Quan Liu , Yangmei Zhang , Muzhen Shi , Dajiang Yu , Junting Zhong , Xinyao Hu , Jiayuan Lu , Aoyuan Yu , Huizheng Che , Xiaoye Zhang
Continuous measurements of particle number size distributions with mobility diameters ranging from 3 to 800 nm were performed at the Longfengshan (LFS) and Lin'an (LAN) stations, which represent the background atmospheric conditions in the Northeast China Plain and the Yangtze River Delta regions, respectively, from October 2021 to April 2022. The mean number concentration of total particles was (5.3 ± 5.1) × 10 cm at LFS and (6.1 ± 2.8) × 10 cm at LAN, respectively. During the measurements, the occurrence frequency of new particle formation (NPF) events was 29% at LFS and 12% at LAN. The mean formation rate of 3 nm particles was 0.45 and 1.65 cm s, the mean particle growth rate was 4.2 and 5.1 nm h, and the mean condensation sink () was 0.019 and 0.023 s at LFS and LAN, respectively. At the LFS, a higher NPF occurrence probability was observed during the measurement period, which could be related to higher SO emissions, low and low temperature during the heating season. However, a higher formation and growth rate of LAN was found, which was probably caused by the higher emission rate of biogenic volatile organic vapors, especially in spring. There was a total of 11 NPF events coincided with LFS and LAN during the measurement, which accounted for 18% and 39% of all NPF events in LFS and LAN, respectively. The simultaneously NPF events occurring at both sites were favored by synoptic conditions, with a cold vortex system dominating Northeastern China. This is also the first time that NPF events have been reported in the cold areas of Northeast China.
更新日期：2024-02-22
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