气候变化领域集成服务门户(CCPortal): Mixing state of refractory black carbon in fog and haze at rural sites in winter on the North China Plain

CCPortal

DOI	10.5194/acp-21-17631-2021
	Mixing state of refractory black carbon in fog and haze at rural sites in winter on the North China Plain
	Zhang Y.; Liu H.; Lei S.; Xu W.; Tian Y.; Yao W.; Liu X.; Liao Q.; Li J.; Chen C.; Sun Y.; Fu P.; Xin J.; Cao J.; Pan X.; Wang Z.
发表日期	2021
ISSN	1680-7316
起始页码	17631
结束页码	17648
卷号	21 期号:23
英文摘要	The variability of the mixing state of refractory black carbon aerosol (rBC) and the corresponding complicated light absorption capacity imposes great uncertainty for its climate forcing assessment. In this study, field observations using a single-particle soot photometer (SP2) were conducted to investigate the mixing state of rBC under different meteorological conditions at a rural site on the North China Plain. The results showed that the hourly mass concentration of rBC during the observation periods was 2.6±1.5 μgm-3 on average, with a moderate increase (3.1±0.9) during fog episodes. The mass-equivalent size distribution of rBC exhibited an approximately lognormal distribution with a mass median diameter (MMD) of 213 nm. We found that the count median diameter (CMD) of rBC particles during snowfall episodes was larger than that before snowfall, and the number of rBC particles with Dc<121 nm were reduced by 28.4 % after snow. This may indicate that rBC-containing particles with small core sizes (Dc) were much more effectively removed by snow with light snow intensity (0.23 mmh-1). Based on the Mie scattering theory simulation, the relative and absolute coating thicknesses of rBC-containing particles were estimated to be ∼1.6 and ∼52 nm for the rBC core with a mass-equivalent diameter (Dc) of 170 to 190 nm, respectively, which indicates that most of the rBC-containing particles were thinly coated. Furthermore, a moderate light absorption enhancement (EabsCombining double low line1.3) and relatively low absorption cross section (MAC Combining double low line 5.5 m2g-1) at 880 nm were observed at the Gucheng (GC) site in winter compared with other typical rural sites. The relationship between the microphysical properties of rBC and meteorological conditions was also studied. Relatively warm and high-RH environments (RH>50%,-4°C
语种	英语
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/246395
作者单位	State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; State Key Laboratory of Severe Weather, Key Laboratory for Atmospheric Chemistry, Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Zhang Y.,Liu H.,Lei S.,et al. Mixing state of refractory black carbon in fog and haze at rural sites in winter on the North China Plain[J],2021,21(23).
APA	Zhang Y..,Liu H..,Lei S..,Xu W..,Tian Y..,...&Wang Z..(2021).Mixing state of refractory black carbon in fog and haze at rural sites in winter on the North China Plain.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(23).
MLA	Zhang Y.,et al."Mixing state of refractory black carbon in fog and haze at rural sites in winter on the North China Plain".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.23(2021).