气候变化领域集成服务门户(CCPortal): Aerosol optical and radiative characteristics under contrasting pollution conditions in a typical urban valley in Northwestern China

CCPortal

DOI	10.1016/j.atmosres.2024.107263
	Aerosol optical and radiative characteristics under contrasting pollution conditions in a typical urban valley in Northwestern China
	Liu, Hui; Yu, Ye; Xia, Dunsheng; Zhao, Suping; Ma, Xiaoyi; Dong, Longxiang
发表日期	2024
ISSN	0169-8095
EISSN	1873-2895
起始页码	300
卷号	300
英文摘要	Aerosol optical and radiative properties play a key role in climate change. Precisely pinpointing the optical and radiative properties of various types of aerosols during diverse pollution events in urban settings remains a challenge. In this study, aerosol optical and radiative properties under contrasting pollution conditions were investigated, including dusty, haze, fireworks, and clean days, in a typical urban valley in Northwestern China, based on observations from the Sun-Sky photometers and simulations from libRadtran. The results show that on dusty days aerosols have high absorption and low backscattering, while on haze days they are characterized by fine, absorptive organic aerosol particles with pronounced forward scattering in the ultraviolet and visible spectra. On fireworks days during Chinese New Year (CNY), fine-mode aerosols from fireworks dominate, with the highest scattering and the lowest absorption under the four pollution conditions, and the particle peak radius growth responds rapidly to changes in relative humidity. Aerosols generally cause Earth's surface cooling and atmospheric warming across various pollution conditions. Notably, dusty days, clean days, and haze days all exhibit a lower positive aerosol radiative forcing (ARF) in the ultraviolet (UV) spectrum at the top of the atmosphere (TOA) due to lower single-scattering albedo (SSA). In contrast, CNY uniquely displays negative UV_ARF at TOA, attributed to high-SSA non-absorptive particles. Aerosols on dusty days have higher positive radiative forcing than on haze days, emphasizing the absorptive impact of mixed dust aerosols. These findings provide valuable insights into the behavior of aerosols under various pollution conditions in a typical urban valley, contributing to a better understanding of the environmental effects of various aerosols in arid urban regions.
英文关键词	Aerosol; Urban pollution; Optical properties; Radiative effect; Lanzhou
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001176825900001
来源期刊	ATMOSPHERIC RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303591
作者单位	Chinese Academy of Sciences; Lanzhou University; Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Liu, Hui,Yu, Ye,Xia, Dunsheng,et al. Aerosol optical and radiative characteristics under contrasting pollution conditions in a typical urban valley in Northwestern China[J],2024,300.
APA	Liu, Hui,Yu, Ye,Xia, Dunsheng,Zhao, Suping,Ma, Xiaoyi,&Dong, Longxiang.(2024).Aerosol optical and radiative characteristics under contrasting pollution conditions in a typical urban valley in Northwestern China.ATMOSPHERIC RESEARCH,300.
MLA	Liu, Hui,et al."Aerosol optical and radiative characteristics under contrasting pollution conditions in a typical urban valley in Northwestern China".ATMOSPHERIC RESEARCH 300(2024).