气候变化领域集成服务门户(CCPortal): Vertical distributions of aerosol microphysical and optical properties based on aircraft measurements made over the Loess Plateau in China

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DOI	10.1016/j.atmosenv.2021.118888
	Vertical distributions of aerosol microphysical and optical properties based on aircraft measurements made over the Loess Plateau in China
	Cai Z.; Li Z.; Li P.; Li J.; Sun H.; Yang Y.; Gao X.; Ren G.; Ren R.; Wei J.
发表日期	2021
ISSN	1352-2310
英文摘要	Aerosol microphysical properties, scattering and absorption characteristics, and in particular, the vertical distributions of these parameters over the eastern Loess Plateau, were analyzed based on aircraft measurements made in 2020 during a summertime aircraft campaign in Shanxi, China. Data from six flights were analyzed. Statistical characteristics and vertical distributions of aerosol concentration, particle size, optical properties, including aerosol scattering coefficient (σsp), backscattering ratio (βsc), Ångström exponent (α), single-scattering albedo (SSA), partially-integrated aerosol optical depth (PAOD), and black carbon concentration (BCc), were obtained and discussed. Mean values of aerosol particle number concentration (Na), particle volume concentration (Va), mass concentration (Ma), surface concentration (Sa), and particle effective diameter (EDa) were 854.92 cm−3, 13.37 μm3 cm−3, 20.06 μg/m3, 170.08 μm3 cm−3, and 0.47 μm, respectively. Mean values of BCc, σsp (450, 525, 635 nm), βsp (525 nm), α(635/450), and SSA were 1791.66 ng m−3, 82.37 Mm−1 at 450 nm, 102.57 Mm−1 at 525 nm, 126.60 Mm−1 at 635 nm, 0.23, 1.47, and 0.92, respectively. Compared with values obtained in 2013, Na decreased by 60% and Ma decreased by 45%, but the scattering coefficients increased in different degrees. In the vertical direction, aerosol concentrations were higher at lower altitudes, decreasing with height. Vertical profiles of σsp, βsp, α(635/450), and BCc measured during the six flights were examined. Two peaks in Na were identified near the top of the boundary layer and between 2000 and 2200 m. Fine particles with EDa smaller than 0.8 μm are dominant in the boundary layer and coarse aerosols existed aloft. Aerosol scattering properties and BCc in the lowest layer of the atmosphere contributed the most to the total aerosol radiative forcing. SSA values were greater than 0.9 below 2500 m, with lower values at higher levels of the atmosphere. On lightly foggy days, SSA values were greater than 0.9, and aerosols played a cooling role in the atmosphere. On hazy days, lower-level SSA values were generally greater than 0.85, with aerosols likely having a warming effect on the atmosphere. 48-hour backward trajectories of air masses during the observation days showed that the majority of aerosol particles in the lower atmosphere originated from local or regional pollution emissions, contributing the most to the total aerosol loading and leading to high values of aerosol concentration and radiative forcing. © 2021 Elsevier Ltd
关键词	Absorption properties Aerosol Aircraft measurements Microphysical properties Scattering properties The loess plateau Vertical distribution
语种	英语
scopus关键词	Aerosols; Aircraft; Atmospheric radiation; Boundary layers; Optical properties; Particle size; Sediments; Absorption property; Aerosol concentration; Aircraft measurement; Black carbon; Microphysical property; Scattering property; Single scattering albedo; The loess plateau; Vertical distributions; Landforms
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/248780
作者单位	State Key Laboratory of Remote Sensing Science, College of Global Change and Earth System Science, Beijing Normal University, Beijing, 100875, China; Artificial Precipitation and Lightning Protection Technology Center, Meteorological Bureau of Shanxi Province, Taiyuan, Shanxi 030032, China; Key Laboratory for Cloud Physics of China Meteorological Administration, CMA Weather Modification Center, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Meteorological Disasters Defense Technology Center, Meteorological Bureau of Shanxi Province, Taiyuan, Shanxi 030032, China; Fenghua District Meteorological Bureau, Ningbo, Zhejiang 315500, China; Service Center of Meteorological Bureau of Shanxi Province, Taiyuan, Shanxi 030002, China; Department of Chemical and Biochemical Engineering, Iowa Technology Institute, Center for Global and Regional Environmental Research, The University of Iowa, Iowa City, IA, United States
推荐引用方式 GB/T 7714	Cai Z.,Li Z.,Li P.,et al. Vertical distributions of aerosol microphysical and optical properties based on aircraft measurements made over the Loess Plateau in China[J],2021.
APA	Cai Z..,Li Z..,Li P..,Li J..,Sun H..,...&Wei J..(2021).Vertical distributions of aerosol microphysical and optical properties based on aircraft measurements made over the Loess Plateau in China.ATMOSPHERIC ENVIRONMENT.
MLA	Cai Z.,et al."Vertical distributions of aerosol microphysical and optical properties based on aircraft measurements made over the Loess Plateau in China".ATMOSPHERIC ENVIRONMENT (2021).