Contributions of different organic compounds to brown carbon light absorption in a river-valley region, China

被引：0
|
作者：
Li, Yu [1 ,2 ,3 ]
Wang, Qiyuan [1 ,3 ,4 ]
Zhang, Yong [1 ]
Wang, Jin [1 ]
Zhou, Bianhong [5 ]
Tian, Jie [1 ]
Liu, Huikun [1 ]
Liu, Suixin [1 ]
Ran, Weikang [1 ,3 ]
Cao, Junji [6 ]
机构：
[1] Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
[2] Xian Inst Innovat Earth Environm Res, Xian 710061, Peoples R China
[3] Natl Observat & Res Stn Reg Ecol Environm Change &, Xian 710499, Shaanxi, Peoples R China
[4] Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
[5] Baoji Univ Arts & Sci, Coll Geog & Environm, Shaanxi Key Lab Disaster Monitoring & Mech Simulat, Baoji 721013, Peoples R China
[6] Chinese Acad Sci, Inst Atmospher & Phys, Beijing 100029, Peoples R China
来源：
ATMOSPHERIC ENVIRONMENT | 2024年 / 335卷
关键词：
Brown carbon; Mass absorption efficiency; Light absorption; River-valley region; AEROSOL OPTICAL-PROPERTIES; BLACK CARBON; PARTICULATE MATTER; MIXING STATE; BIOMASS; ENHANCEMENT; EMISSIONS; PARTICLES; AMBIENT; WINTER;
D O I：
10.1016/j.atmosenv.2024.120731
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
.102938 demonstrate that biomass-burning OA (BBOA) accounted for 33% of the BrC absorption at a wavelength of 370 nm, surpassing the contributions of coal combustion OA (CCOA) at 30% and cooking OA (COA) at 29% during the observation period. Notably, BBOA's contribution to BrC absorption intensified as air quality deteriorated from excellent to polluted, whereas COA's contribution decreased. The impact of CCOA on BrC absorption showed minor variations with air quality. Additionally, the source contributions to BrC absorption differed between daytime and nighttime, with CCOA dominating during daytime and BBOA leading at night. This study enhances our comprehension of BrC's optical characteristics and the array of sources influencing its light absorption in river-valley regions.
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页数：10
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