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DOI	10.5194/acp-21-11405-2021
	Reduced light absorption of black carbon (BC) and its influence on BC-boundary-layer interactions during APEC Blue
	Gao M.; Yang Y.; Liao H.; Zhu B.; Zhang Y.; Liu Z.; Lu X.; Wang C.; Zhou Q.; Wang Y.; Zhang Q.; Carmichael G.R.; Hu J.
发表日期	2021
ISSN	1680-7316
起始页码	11405
结束页码	11421
卷号	21 期号:14
英文摘要	Light absorption and radiative forcing of black carbon (BC) is influenced by both BC itself and its interactions with other aerosol chemical compositions. Although the changes in BC concentrations in response to emission reduction measures have been well documented, the influence of emission reductions on the light absorption properties of BC and its influence on BC-boundary-layer interactions has been less explored. In this study, we used the online coupled WRF-Chem model to examine how emission control measures during the Asia-Pacific Economic Cooperation (APEC) summit affect the mixing state and light absorption of BC, and the associated implications for BC-PBL interactions. We found that both the mass concentration of BC and the BC coating materials declined during the APEC week, which reduced the light absorption and light absorption enhancement (Eab) of BC. The reduced absorption aerosol optical depth (AAOD) during APEC was caused by both the decline in the mass concentration of BC itself (52.0ĝ€¯%), and the lensing effect of BC (48.0ĝ€¯%). The reduction in coating materials (39.4ĝ€¯%) contributed the most to the influence of the lensing effect, and the reduced light absorption capability (Eab) contributed 3.2ĝ€¯% to the total reduction in AAOD. Reduced light absorption of BC due to emission control during APEC enhanced planetary boundary layer height (PBLH) by 8.2ĝ€¯m. PM2.5 and O3 were found to have different responses to the changes in the light absorption of BC. Reduced light absorption of BC due to emission reductions decreased near-surface PM2.5 concentrations but near-surface O3 concentrations were enhanced in the North China Plain. These results suggest that current measures to control SO2, NOx, etc. would be effective in reducing the absorption enhancement of BC and in inhibiting the feedback of BC on the boundary layer. However, enhanced ground O3 might be a side effect of current emission control strategies. How to control emissions to offset this side effect of current emission control measures on O3 should be an area of further focus. © Copyright:
语种	英语
scopus关键词	aerosol composition; black carbon; concentration (composition); particulate matter; radiative forcing; source apportionment; weather forecasting; China; North China Plain
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246696
作者单位	Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Nanjing University of Information Science and Technology, Nanjing, 210044, China; Department of Geography, State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Hong Kong, 999077, Hong Kong; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing, 210044, China; School of Atmospheric Sciences, Nanjing University, Nanjing, 210023, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; School of Atmospheric Sciences, Sun Yat-Sen University, Zhuhai, 519082, China; Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, IA 52242, United States; Ministr...
推荐引用方式 GB/T 7714	Gao M.,Yang Y.,Liao H.,et al. Reduced light absorption of black carbon (BC) and its influence on BC-boundary-layer interactions during APEC Blue[J],2021,21(14).
APA	Gao M..,Yang Y..,Liao H..,Zhu B..,Zhang Y..,...&Hu J..(2021).Reduced light absorption of black carbon (BC) and its influence on BC-boundary-layer interactions during APEC Blue.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(14).
MLA	Gao M.,et al."Reduced light absorption of black carbon (BC) and its influence on BC-boundary-layer interactions during APEC Blue".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.14(2021).