文献类型：期刊文献

英文题名：Sources and vertical distribution of PM2.5 over Shanghai during the winter of 2017

作者：Zhang, Kun[1,2,3,4];Zhou, Lei[1,3,5];Fu, Qingyan[6];Yan, Lei[1,3];Morawska, Lidia[4];Jayaratne, Rohan[4];Xiu, Guangli[1,3,5]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China;[3]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai Environm Protect Key Lab Environm Stand, Shanghai 200237, Peoples R China;[4]Queensland Univ Technol, Ctr Med & Hlth Phys, GPO Box 2434, Brisbane, Qld 4001, Australia;[5]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[6]Shanghai Environm Monitoring Ctr, Shanghai 200235, Peoples R China

年份：2020

卷号：706

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20195007829864);WOS:【SCI-EXPANDED(收录号:WOS:000506376300124)】；

基金：This work was supported by the National Key Research and Development Program of China (No. 2016YFC0200502) and the Natural Science Foundation of China (21806037). The authors would like to thank Juntao Huo from the Shanghai Environment Monitoring Center, and Dongnian Fei from China Electronics Technology Group Corporation No, 38 Research Institute for their technical support on the field campaign. This project was also supported by the Australia-China Centre for Air Quality Science and Management.

语种：英文

外文关键词：Tethered balloon; GAMs; Vertical profiles, Shanghai

摘要：Shanghai, a metropolitan city in China, has suffered from severe air pollution, especially PM2.5, in the last few years. Up to now the contribution of local emission and regional transport to the formation of haze in Shanghai remains unclear. With an aim to characterize the mechanism of haze formation in Shanghai, the present paper attempted to provide an overview of a tethered balloon-based field campaign. According to the backward trajectories, the air mass traveling slowly from Jiangsu province accounted for the highest PM2.5, concentration (66 +/- 20 mu g/m(3)). Seventy vertical profiles of PM2.5 NO, NO2, SO2 and O-3 within 1000 m were obtained, through which a comparison study on the characteristics of the vertical distributions of air pollutants on clean days and haze days was conducted. When altitude increased, clearly decreasing pattern of PM2.5, NO, and NO2 was observed during the field campaign. Due to the low atmospheric boundary layer, the diffusion of air pollutants was suppressed, which favored the formation of haze. The results of the generalized additive model revealed NO2 could the most significant factor influencing the vertical distribution of PM2.5 in both clean and haze days. This study provides new insight into the sources and vertical distribution of PM2.5, which could offer references for air pollution modeling. (C) 2019 Elsevier BM. All rights reserved.