In-cloud scavenging characteristics of black carbon in the mountain background region of South China
XU Hai-bao1,2, MA Nan1,2, YANG Zheng1,2, PENG Long1,2, XIE Lin-hong1,2, HE Yao1,2, TAO Jiang-chuan1,2, HONG Juan1,2, WANG Qiao-qiao1,2, WANG Bo-guang1,2, BI Xin-hui3,4,5
1. Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China; 2. Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou 511443, China; 3. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; 4. Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou 510640, China; 5. Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou 510640, China
Abstract:During three typical cloud events occurred in the mountain region of South China, a ground-based counterflow virtual impactor was used to collect particulate matter in clouds. A single particle soot photometer and a fog monitor were used to analyze the black carbon (BC) concentration and cloud parameters, respectively. BC in-cloud scavenging efficiency and its influencing factors were discussed. Results showed that the proportion of in-cloud BC was about 20%. 4.67% droplets contained BC, while the proportion of BC-containing interstitial particles is 15.31%. The mass and number scavenging efficiency of BC with different particle sizes were similar, ranging from 28% to 59%. High liquid water content and cloud droplet number concentration were beneficial to the in-cloud scavenging of BC, while BC in-cloud scavenging efficiency decreased with increasing total BC concentration. The order of the influence factors of BC in-cloud scavenging efficiency was cloud droplet number concentration > liquid water content> total BC concentration.
徐海保, 马楠, 杨争, 彭龙, 谢林宏, 何瑶, 陶江川, 洪娟, 王俏巧, 王伯光, 毕新慧. 华南高山背景地区黑碳云内清除特征[J]. 中国环境科学, 2022, 42(10): 4475-4485.
XU Hai-bao, MA Nan, YANG Zheng, PENG Long, XIE Lin-hong, HE Yao, TAO Jiang-chuan, HONG Juan, WANG Qiao-qiao, WANG Bo-guang, BI Xin-hui. In-cloud scavenging characteristics of black carbon in the mountain background region of South China. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(10): 4475-4485.
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