Concentrations and Sources of Black Carbon Aerosols in Rural Areas of Southern North China Plain

被引：0
|
作者：
Zhang L. [1 ]
Kong S.-F. [1 ]
Zheng H. [1 ]
Hu Y. [1 ]
Zeng X. [1 ]
Cheng Y. [1 ]
Qi S.-H. [1 ,2 ]
机构：
[1] School of Environmental Studies, China University of Geosciences, Wuhan
[2] State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan
来源：
Huanjing Kexue/Environmental Science | 2022年 / 43卷 / 05期
关键词：
Black carbon aerosol; Rural region; Source identification; Source region; The southern North China Plain;
D O I：
10.13227/j.hjkx.202108052
中图分类号：
学科分类号：
摘要：
The southern North China Plain is currently one of the regions with serious air pollution in China. Despite its role as a key connection region for air mass transportation between south and north China, there are still few studies on the atmospheric environment in this region. To obtain the levels and sources of black carbon (BC) aerosol, an online continuous measurement of BC by Aethalometer Model AE-33 was conducted at a rural site in the southern North China Plain. The results indicated that the average ρ(BC) was (3.51±2.29) μg•m-3 during the observation period, and the average ρ(BC) were (8.21±3.26), (3.49±1.69), and (2.37±0.71) μg•m-3 in winter, spring, and summer, respectively. The seasonal variation in ρ(BC) was caused by the variations in meteorological factors and emission sources. ρ(BC) peaked at 08:00 [(4.66±3.24) μg•m-3] and 20:00 [(4.25±6.73) μg•m-3] within one day, which was consistent with the cooking time of local residents. The valley value appeared at 14:00 [(2.44±3.33) μg•m-3] during the day, which was mainly related to the high boundary layer height. The aerosol absorption exponent (AAE) was between 1.08-1.66, and the average values were 1.41±0.08, 1.28±0.10, and 1.20±0.06 in winter, spring, and summer, respectively. This indicated that fossil fuel burning was a main source of BC in the rural area of this region. In winter, the contribution of biomass fuel burning emissions to BC was the highest [(41±12)%], which was related to the frequent burning activities of wood, straw, and other biomass fuels by local residents. The influence of northern air masses (40%) was obvious in winter and spring, and the influence of southern air masses (34%) was obvious in summer. The higher BC concentrations in winter were related to local human activities such as firewood heating and civil coal furnaces, as well as the long-range transportation of air masses. This study is helpful for understanding the concentration, source, and optical properties of BC in rural areas of China and also provides a dataset of the key note sites for investigating the interaction of atmospheric pollutant transport between North and South China. © 2022, Science Press. All right reserved.
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页码：2363 / 2372
页数：9
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