气候变化领域集成服务门户(CCPortal): Characteristics of the atmospheric boundary layer and its relation with PM2.5 during haze episodes in winter in the North China Plain

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DOI	10.1016/j.atmosenv.2020.117265
	Characteristics of the atmospheric boundary layer and its relation with PM2.5 during haze episodes in winter in the North China Plain
	Li Q.; Wu B.; Liu J.; Zhang H.; Cai X.; Song Y.
发表日期	2020
ISSN	13522310
卷号	223
英文摘要	Interactions between the spatiotemporal distribution of pollutants and the structure of the atmospheric boundary layer were studied using data obtained by GPS (Global Positioning System) sounding balloons in an intensive observation period from December 2018 to January 2019 at the Dezhou experimental station in the North China Plain. Under haze weather conditions, negligible variation or a slight increase in temperature, higher relative humidity (RH) and lower wind speed with uncertain wind direction are common characteristics. The concentration distribution of particulate matter ≤2.5 μm (PM2.5) has a close relationship with the inversion layer, which contributes to the accumulation of PM2.5 in the lower atmosphere. The reduction of pollutants suspended in the upper layer during haze periods is closely related to low-level jets and intermittent turbulence. Higher RH values are also favourable for the formation of heavy haze, and the value of PM2.5 increases with an increase in humidity. During hazy days, the heat fluxes and turbulent kinetic energy (TKE) are much smaller than those during clear days. The values of the average maxima of net radiation, sensible heat flux, and latent heat flux are 154, 76, and 15 W/m2, respectively, and the value of TKE is approximately 0.67 m2/s2. The decrease in atmospheric boundary layer height (ABLH) is caused by weaker turbulent transfer during haze episodes. The ABLH is approximately 400 m during the daytime and 240 m at night. The power function relationship is shown by a negative correlation between the ABLH and surface PM2.5 concentration in the convective boundary layer. © 2020 Elsevier Ltd
英文关键词	Atmospheric boundary layer; Haze; North China Plain; PM2.5 concentration profile
学科领域	Atmospheric humidity; Atmospheric structure; Atmospheric thermodynamics; Boundary layer flow; Global positioning system; Heat flux; Kinetic energy; Kinetics; Pollution; Wind; Concentration distributions; Convective boundary layers; Gps (global positioning system); Haze; Intensive observation periods; North China Plain; PM2.5 concentration; Spatiotemporal distributions; Atmospheric boundary layer; balloon observation; boundary layer; climate conditions; concentration (composition); episodic event; experimental study; GPS; haze; particulate matter; spatiotemporal analysis; wind direction; wind velocity; winter; air pollutant; air pollution; Article; boundary layer; China; global positioning system; haze; heat; humidity; particle size; particulate matter; priority journal; radiation; surface property; turbulent flow; weather; wind speed; winter; China; Dezhou; North China Plain; Shandong
语种	英语
scopus关键词	Atmospheric humidity; Atmospheric structure; Atmospheric thermodynamics; Boundary layer flow; Global positioning system; Heat flux; Kinetic energy; Kinetics; Pollution; Wind; Concentration distributions; Convective boundary layers; Gps (global positioning system); Haze; Intensive observation periods; North China Plain; PM2.5 concentration; Spatiotemporal distributions; Atmospheric boundary layer; balloon observation; boundary layer; climate conditions; concentration (composition); episodic event; experimental study; GPS; haze; particulate matter; spatiotemporal analysis; wind direction; wind velocity; winter; air pollutant; air pollution; Article; boundary layer; China; global positioning system; haze; heat; humidity; particle size; particulate matter; priority journal; radiation; surface property; turbulent flow; weather; wind speed; winter; China; Dezhou; North China Plain; Shandong
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/120775
作者单位	Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China; Tianjin Municipal Meteorological Bureau, Tianjin, 300074, China; State Key Joint Laboratory of Environmental Simulation and Pollution Control, Department of Environmental Science, Peking University, Beijing, 100871, China
推荐引用方式 GB/T 7714	Li Q.,Wu B.,Liu J.,et al. Characteristics of the atmospheric boundary layer and its relation with PM2.5 during haze episodes in winter in the North China Plain[J],2020,223.
APA	Li Q.,Wu B.,Liu J.,Zhang H.,Cai X.,&Song Y..(2020).Characteristics of the atmospheric boundary layer and its relation with PM2.5 during haze episodes in winter in the North China Plain.Atmospheric Environment,223.
MLA	Li Q.,et al."Characteristics of the atmospheric boundary layer and its relation with PM2.5 during haze episodes in winter in the North China Plain".Atmospheric Environment 223(2020).