气候变化领域集成服务门户(CCPortal): Seasonal characteristics of aerosol vertical structure and autumn enhancement of non-spherical particle over the semi-arid region of northwest China

CCPortal

DOI	10.1016/j.atmosenv.2020.117912
	Seasonal characteristics of aerosol vertical structure and autumn enhancement of non-spherical particle over the semi-arid region of northwest China
	Zhou T.; Xie H.; Jiang T.; Huang J.; Bi J.; Huang Z.; Shi J.
发表日期	2021
ISSN	13522310
卷号	244
英文摘要	Assessments of the effects of aerosols on the climate and environment still feature large uncertainties, and a better understanding of the spatiotemporal variation in these effects is needed. In this study, coincident observations of ground-based lidar and sun photometer measurements from March 2010 to February 2011 were selected to examine the sensible seasonal characteristics of the aerosol vertical structure and the potential variations of aerosol properties before and during the wintertime heating period at SACOL (Semi-Arid Climate and Environment Observatory of Lanzhou University, 35.946°N, 104.137°E, 1961 m ASL), northwest of China. Our results suggest that the aerosol behavior during a year can be roughly divided into two major periods: the non-spherical particle dominated period and the spherical particle dominated period based on the depolarization ratio, or the dust-dominated period (spring and winter) and the non-dust-dominated period (summer and autumn) based on the aerosol angstrom exponent. The height and width of peak of aerosol scale height frequency distribution show the distribution of aerosol layers in summer is highest, then followed by spring, autumn and winter. The depolarization ratios at different heights in spring are higher than those in other seasons. A similar distribution of extinction coefficients above 2 km can be seen in four seasons, but relatively large differences exist below 2 km, especially within 1 km. The increase of the extinction coefficient is observed near surface in November 2010 with a sharp increase in depolarization ratio which is induced by the rising contribution of the dust events (up to 13%) and the mixed type aerosols (70%). These results not only provide detailed characteristics of aerosol variation over the SACOL region, but also remind us to take into account the potential contribution of dust aerosol to the severe regional air pollution during the wintertime heating period. © 2020 Elsevier Ltd
英文关键词	Aerosol vertical structure; Lidar; Non-spherical particle enhancement; Seasonal characteristics
语种	英语
scopus关键词	Aerosols; Depolarization; Dust; Spheres; Aerosol vertical structure; Extinction coefficients; Frequency distributions; Nonspherical particle; Potential variations; Regional air pollution; Seasonal characteristics; Spatio-temporal variation; Air pollution; aerosol; atmospheric pollution; autumn; ground-based measurement; lidar; photometer; seasonal variation; semiarid region; uncertainty analysis; vertical distribution; aerosol; air pollution; Article; autumn; boundary layer; chemical structure; China; depolarization; dust; heating; meteorology; particle size; photometry; priority journal; radiation scattering; seasonal variation; semiarid climate; spring; summer; surface property; troposphere; winter; China; Gansu; Lanzhou
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144866
作者单位	Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China; College of Meteorology and Oceanography, National University of Defense Technology, Changsha, 410000, China
推荐引用方式 GB/T 7714	Zhou T.,Xie H.,Jiang T.,et al. Seasonal characteristics of aerosol vertical structure and autumn enhancement of non-spherical particle over the semi-arid region of northwest China[J],2021,244.
APA	Zhou T..,Xie H..,Jiang T..,Huang J..,Bi J..,...&Shi J..(2021).Seasonal characteristics of aerosol vertical structure and autumn enhancement of non-spherical particle over the semi-arid region of northwest China.Atmospheric Environment,244.
MLA	Zhou T.,et al."Seasonal characteristics of aerosol vertical structure and autumn enhancement of non-spherical particle over the semi-arid region of northwest China".Atmospheric Environment 244(2021).