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DOI	10.5194/acp-19-13175-2019
	Role of black carbon mass size distribution in the direct aerosol radiative forcing
	Zhao G.; Tao J.; Kuang Y.; Shen C.; Yu Y.; Zhao C.
发表日期	2019
ISSN	16807316
起始页码	13175
结束页码	13188
卷号	19 期号:20
英文摘要	Large uncertainties exist when estimating radiative effects of ambient black carbon (BC) aerosol. Previous studies about the BC aerosol radiative forcing mainly focus on the BC aerosols' mass concentrations and mixing states, while the effects of BC mass size distribution (BCMSD) were not well considered. In this paper, we developed a method of measuring the BCMSD by using a differential mobility analyzer in tandem with an Aethalometer. A comprehensive method of multiple charging corrections was proposed and implemented in measuring the BCMSD. Good agreement was obtained between the BC mass concentration integrated from this system and that measured in the bulk phase, demonstrating the reliability of our proposed method. Characteristics of the BCMSD and corresponding radiative effects were studied based on a field measurement campaign conducted in the North China Plain by using our own measurement system. Results showed that the BCMSD had two modes and the mean peak diameters of the modes were 150 and 503nm. The BCMSD of the coarser mode varied significantly under different pollution conditions with peak diameter varying between 430 and 580nm, which gave rise to significant variation in aerosol bulk optical properties. The direct aerosol radiative forcing was estimated to vary by 8.45% for different measured BCMSDs of the coarser mode, which shared the same magnitude with the variation associated with assuming different aerosol mixing states (10.5%). Our study reveals that the BCMSD as well as its mixing state in estimating the direct aerosol radiative forcing matters. Knowledge of the BCMSD should be fully considered in climate models. © Author(s) 2019.
语种	英语
scopus关键词	aerosol formation; air quality; atmospheric pollution; black carbon; climate modeling; particulate matter; pollution monitoring; radiative forcing; size distribution
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/144074
作者单位	Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China; Institute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, China
推荐引用方式 GB/T 7714	Zhao G.,Tao J.,Kuang Y.,et al. Role of black carbon mass size distribution in the direct aerosol radiative forcing[J],2019,19(20).
APA	Zhao G.,Tao J.,Kuang Y.,Shen C.,Yu Y.,&Zhao C..(2019).Role of black carbon mass size distribution in the direct aerosol radiative forcing.Atmospheric Chemistry and Physics,19(20).
MLA	Zhao G.,et al."Role of black carbon mass size distribution in the direct aerosol radiative forcing".Atmospheric Chemistry and Physics 19.20(2019).