KMS Chongqing Institute of Green and Intelligent Technology, CAS
Evolution of black carbon and brown carbon during summertime in Southwestern China: An assessment of control measures during the 2023 Chengdu Summer World University Games | |
Bao, Zhier1; Zeng, Xiaoling1; Zhou, Jiawei1; Yang, Fumo2; Lu, Keding3; Zhai, Chongzhi4; Li, Xin3; Feng, Miao5; Tan, Qinwen5; Chen, Yang1 | |
2024-09-15 | |
摘要 | The 31st FISU Summer World University Games (SWUG) was held in Chengdu, southwestern China, from July 22 to August 8, 2023. A series of control measures were carried out to ensure good air quality during the SWUG, providing an opportunity to investigate the atmospheric behaviors of light-absorbing aerosols under such a substantial disturbance caused by the control measures. To assess the impacts of emission controls on primary pollutants, a field campaign was conducted at a rural site in Chengdu to investigate the characterization of equivalent black carbon (eBC). The changes of eBC concentrations before, during, and after the SWUG were characterized. The sources of eBC were resolved, and the impacts of atmospheric processes on the absorption capacity were also investigated. During the SWUG, the eBC concentration decreased by 12.1 % and 25.3 % compared with those before and after the SWUG. A fossil fuel combustion (eBCff) and a biomass burning (eBCbb) originated eBC were resolved using the aethalometer model. Both eBCff and eBCbb decreased during the SWUG, indicating the effectiveness of control measures. After the SWUG, the influence of biomass burning emissions became more and more significant, and the contribution of brown carbon (BrC) to light absorption at 370-660 nm increased by 52, 19, 7, 6, and 17 % compared to those during the SWUG. As the biomass burning emitted aerosols aged, the absorption & Aring;ngstro |
关键词 | Black carbon Source apportionment Summer World University Games Optical properties |
DOI | 10.1016/j.envpol.2024.124467 |
发表期刊 | ENVIRONMENTAL POLLUTION |
ISSN | 0269-7491 |
卷号 | 357页码:11 |
通讯作者 | Chen, Yang(chenyang@cigit.ac.cn) |
收录类别 | SCI |
WOS记录号 | WOS:001264164800001 |
语种 | 英语 |