Effect of source variation on the size and mixing state of black carbon aerosol in urban Beijing from 2013 to 2019: Implication on light absorption

doi:10.1016/j.envpol.2020.116089

IEECAS OpenIR > 粉尘与环境研究室

	Effect of source variation on the size and mixing state of black carbon aerosol in urban Beijing from 2013 to 2019: Implication on light absorption
	Wu, Yunfei 1; Xia, Yunjie 1,9; Zhou, Chang 1,9; Tian, Ping 2; Tao, Jun 3; Huang, Ru-Jin 4; Liu, Dantong 5; Wang, Xin 6; Xia, Xiangao 1,8; Han, Zhiwei 7; Zhang, Renjian 1,8
通讯作者	Wu, Yunfei(wuyf@mail.iap.ac.cn)
	2021-02-01
发表期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
卷号	270 页码:13
摘要	Black carbon (BC) is the most important aerosol light-absorbing component, and its effect on radiation forcing is determined by its microphysical properties. In this study, two microphysical parameters of refractory BC (rBC), namely, size distribution and mixing state, in urban Beijing from 2013 to 2019 were investigated to understand the effects of source changes over the past years. The mass equivalent diameter of rBC (Dc) exhibited bimodal lognormal distributions in all seasons, with the major modes accounting for most (>85%) of the rBC masses. The mass median diameter (MMD) was obviously larger in winter (209 nm) than in summer (167 nm) likely due to the contribution of more rBC with larger Dc from solid fuel combustion and enhanced coagulation of rBC in polluted winter. More rBC particles were thickly coated in winter, with the number fraction of thickly coated rBC (fcoatBC) ranging within 29%-48% compared with that of 12%-14% in summer. However, no evidential increase in BC light-absorption capability was observed in winter. This finding was likely related to the lower absorption efficiency of larger rBC in winter, which partly offset the coating-induced light enhancement. Two stage of decreases in MMD and fcoatBC were observed, accompanied with a persistent decrease in rBC loading, thereby reflecting the discrepant effects of source control measures on rBC loading and physical properties. The control measures in the earlier stage before 2016 was more efficient to reduce the rBC loading but slightly influenced the microphysical properties of rBC. As of 2016, the reduction in rBC concentration slowed down because of its low atmospheric loading. However, rBC showed a more obvious decrease in its core size and became less coated. The decrease in fcoatBC may have weakened the BC absorption and accelerated the decrease in light absorption resulting from the reduction in rBC loading. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	Black carbon Size distribution Mixing state Source variation Absorption capability
DOI	10.1016/j.envpol.2020.116089
关键词[WOS]	PARTICLE SOOT PHOTOMETER ; AIR-QUALITY IMPROVEMENT ; QINGHAI-TIBETAN PLATEAU ; SOURCE APPORTIONMENT ; ANTHROPOGENIC EMISSIONS ; PHYSICAL-PROPERTIES ; PARTICULATE MATTER ; OPTICAL-PROPERTIES ; COASTAL CITY ; CHINA
收录类别	SCI ; SCI
语种	英语
资助项目	National Key Research and Development Program of China[2019YFA0606801] ; Natural Science Foundation of China[41775155] ; Natural Science Foundation of China[41830966] ; Jiangsu Collaborative Innovation Center for Climate Change
WOS研究方向	Environmental Sciences & Ecology
项目资助者	National Key Research and Development Program of China ; Natural Science Foundation of China ; Jiangsu Collaborative Innovation Center for Climate Change
WOS类目	Environmental Sciences
WOS记录号	WOS:000608065400043
出版者	ELSEVIER SCI LTD
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/15883
专题	粉尘与环境研究室
通讯作者	Wu, Yunfei
作者单位	1.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Obser, Beijing 100029, Peoples R China 2.Beijing Weather Modificat Off, Beijing 100089, Peoples R China 3.Minist Ecol & Environm, South China Inst Environm Sci, Guangzhou 510530, Peoples R China 4.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 5.Zhejiang Univ, Sch Earth Sci, Dept Atmospher Sci, Hangzhou 310027, Peoples R China 6.Lanzhou Univ, Key Lab Semiarid Climate Change, Minist Educ, Lanzhou 730000, Peoples R China 7.Chinese Acad Sci, Key Lab Reg Climate Environm Temperate East Asia, Inst Atmospher Phys, Beijing 100029, Peoples R China 8.Chinese Acad Sci, Inst Atmospher Phys, Xianghe Observ Whole Atmosphere, Xianghe 065400, Peoples R China 9.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wu, Yunfei,Xia, Yunjie,Zhou, Chang,et al. Effect of source variation on the size and mixing state of black carbon aerosol in urban Beijing from 2013 to 2019: Implication on light absorption[J]. ENVIRONMENTAL POLLUTION,2021,270:13.
APA	Wu, Yunfei.,Xia, Yunjie.,Zhou, Chang.,Tian, Ping.,Tao, Jun.,...&Zhang, Renjian.(2021).Effect of source variation on the size and mixing state of black carbon aerosol in urban Beijing from 2013 to 2019: Implication on light absorption.ENVIRONMENTAL POLLUTION,270,13.
MLA	Wu, Yunfei,et al."Effect of source variation on the size and mixing state of black carbon aerosol in urban Beijing from 2013 to 2019: Implication on light absorption".ENVIRONMENTAL POLLUTION 270(2021):13.