JpGU-AGU Joint Meeting 2020

講演情報

[E] ポスター発表

セッション記号 A (大気水圏科学) » A-AS 大気科学・気象学・大気環境

[A-AS13] New particle formation and its impacts on atmospheric chemistry

コンビーナ:Jun Zheng(Nanjing University of Information Science and Technology)、Lin Wang(Fudan University)

[AAS13-P04] Nucleation events within an industrial zone in the YRD region of China

*Jun Zheng1Yan Ma1Dongsen Yang1 (1.Nanjing University of Information Science and Technology)

キーワード:Nucleation, Criegee radicals, Sulfuric acid

Nucleation processes contribute substantial secondary aerosols in the atmosphere, which often lead to severe air pollution episodes in China, especially in heavily populated urban area. In this work, we conducted field observations of nucleation events in Nanjing, China. The field observations were conducted during the Fall of 2015. Both gaseous sulfuric acid (H2SO4) and sub-3 nm particles were simultaneously detected. H2SO4 and sub-3 nm aerosols showed excellent correlations during the nucleation events. Multivariate analysis indicated that two or three molecules of H2SO4 might be present in the critical nuclei. Several nocturnal nucleation events with concurring H2SO4 peaks were also observed while the site was within the industrial plumes. High level of alkenes and relative high concentration of O3 (~30 ppbv) indicated that alkene ozonolysis might be responsible for the nighttime production of H2SO4. The impacts of the nocturnal nucleation processes on the local air quality need to be further investigated.