COVID‐19 impact on the concentration and composition of submicron particulate matter in a typical city of Northwest China,Geophysical Research Letters

当前位置： X-MOL 学术 › Geophys. Res. Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

COVID‐19 impact on the concentration and composition of submicron particulate matter in a typical city of Northwest China
Geophysical Research Letters ( IF 5.2 ) Pub Date : 2020-10-05 , DOI: 10.1029/2020gl089035
Jianzhong Xu ₁ , Xinlei Ge ₂ , Xinghua Zhang ₁ , Wenhui Zhao ₁ , Ruixiong Zhang ₃ , Yuzhong Zhang ₄

Affiliation

Abstract In this study, we evaluated the variations of air quality in Lanzhou, a typical city in Northwestern China impacted by the COVID‐19 lockdown. The mass concentration and chemical composition of non‐refractory submicron particulate matter (NR‐PM1) were determined by a high‐resolution aerosol mass spectrometer during January‐March 2020. The concentration of NR‐PM1 dropped by 50% from before to during control period. The five aerosol components (sulfate, nitrate, ammonium, chloride, and organic aerosol [OA]) all decreased during the control period with the biggest decrease observed for secondary inorganic species (70% of the total reduction). Though the mass concentration of OA decreased during the control period, its source emissions varied differently. OA from coal and biomass burning remained stable from before to during control period, while traffic and cooking related emissions were reduced by 25% and 50%, respectively. The low concentration during the control period was attributed to the lower production rate for secondary aerosols.

更新日期：2020-10-05

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>