气候变化领域集成服务门户(CCPortal): Size-resolved carbonaceous aerosols at near surface level and the hilltop in a typical valley city, China

CCPortal

DOI	10.1016/j.apr.2019.09.022
	Size-resolved carbonaceous aerosols at near surface level and the hilltop in a typical valley city, China
	Zhao S.; Yu Y.; Du Z.; Yin D.; Yang J.; Dong L.; Li P.
发表日期	2020
ISSN	13091042
卷号	11 期号:1
英文摘要	The lack of light–absorbing aerosols vertical distributions data largely limited to revealing the formation mechanism of severe haze pollution in Chinese cities. Based on the synchronous measurements of size–resolved carbonaceous aerosols and meteorological data at near surface level and hilltop (about 620 m above the valley) in Lanzhou of northwest China, this study compared organic and elemental carbon (OC, EC) size distributions at the two altitudes and revealed the key influencing factors in a typical urban valley, China. The winter OC size distributions were typically bimodal with two comparable peaks in the accumulation and coarse modes, while those in summer were unimodal with the highest value in the size bin of 4.7–5.8 μm. The size-resolved OC and EC at near the surface were significantly higher than those at the hilltop. The difference (concentrations and size distributions) of OC and EC between the surface and hilltop in summer was much smaller than that in winter due to stronger vertical mixing and larger summer SOC contributions at the hilltop. The winds paralleling with running urban valley were conducive to dispersing the air pollutants from near the surface to the upper air. The roles of horizontal and vertical dispersions to carbonaceous aerosols were comparable at near the surface, while horizontal dispersion was more important at the hilltop. Furthermore, the vertical dispersion was a main factor controlling size–resolved carbonaceous aerosols under highly polluted conditions in a typical urban valley. This study will provide the basis for regulation of severe haze pollution over complex terrain. © 2019 Turkish National Committee for Air Pollution Research and Control
英文关键词	Carbonaceous aerosols; Lanzhou; size distributions; Urban valley; Vertical distributions
语种	英语
来源期刊	Atmospheric Pollution Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120683
作者单位	Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Shanghai, 200433, China; Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Lanzhou Central Weather Station, Lanzhou, 730000, China
推荐引用方式 GB/T 7714	Zhao S.,Yu Y.,Du Z.,et al. Size-resolved carbonaceous aerosols at near surface level and the hilltop in a typical valley city, China[J],2020,11(1).
APA	Zhao S..,Yu Y..,Du Z..,Yin D..,Yang J..,...&Li P..(2020).Size-resolved carbonaceous aerosols at near surface level and the hilltop in a typical valley city, China.Atmospheric Pollution Research,11(1).
MLA	Zhao S.,et al."Size-resolved carbonaceous aerosols at near surface level and the hilltop in a typical valley city, China".Atmospheric Pollution Research 11.1(2020).