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DOI	10.1016/j.atmosres.2020.105179
	Analysis of differences between thermodynamic and material boundary layer structure: Comparison of detection by ceilometer and microwave radiometer
	Jiang Y.; Xin J.; Zhao D.; Jia D.; Tang G.; Quan J.; Wang M.; Dai L.
发表日期	2021
ISSN	0169-8095
卷号	248
英文摘要	Planetary boundary layer height (PBLH) is a key parameter for air quality prediction and boundary layer meteorology studies. The height of thermodynamic boundary layer (Hθ) and material boundary layer (HC) in different seasons are compared by using microwave radiometer (MWR) and ceilometer. There are considerable differences between Hθ and HC and the causes are further studied. We found that when the boundary layer is markedly stable at night, the MWR's algorithm used to estimate PBLH has a retrieval restriction and directly leads to a much higher Hθ than HC (1 to 2.5 km higher). This unrealistic PBLH can be identified and eliminated effectively by using temperature differences from the surface to 1 km. During periods of transportation and diffusion of aerosols, strong southerly winds transporting pollutants northward above Hθ or strong northerly winds throughout the boundary layer removing pollutants will cause a much higher HC than Hθ (0.5 to 2 km higher). However, when transportation occurs in the lower layer within Hθ, HC and Hθ are consistent. The aerosol layers is able to characterize the multiple-layered structure of the nocturnal boundary layer (NBL) and the evolution of the boundary layer by using backscatter. The stable boundary layer (SBL) ranges from 0.3 to 0.6 km at night. Compared with the idealized thermodynamic boundary layer, there isn't a distinct boundary between the SBL and the growing mixing layer (ML) after sunrise. The residual layer (RL) ranges from 0.5 to 1.5 km, it lasts 4 or 5 h after sunrise and shows up again within 2 h after sunset. The maximum detectable range of Doppler Lidar has a large backscatter gradient, so is strongly consistent with the RL at night and the ML in the daytime during a pollution event. The combined observation of microwave radiometer and ceilometer can well reveal the completed characteristics of boundary layer structures. © 2020 Elsevier B.V.
英文关键词	Ceilometer; Material PBL; Microwave radiometer; Residual layer; Thermodynamic PBL
语种	英语
scopus关键词	Aerosols; Air quality; Backscattering; Boundary layer flow; Meteorological instruments; Microwave devices; Microwave measurement; Radiometers; Thermodynamics; Air quality prediction; Boundary layer structure; Material boundaries; Microwave radiometers; Nocturnal boundary layers; Planetary boundary layers; Stable boundary layer; Temperature differences; Boundary layers; boundary layer; comparative study; Doppler lidar; height determination; microwave radiometer; mixed layer; thermodynamics
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/141723
作者单位	State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing, 210044, China; Institude of Urban Meteorology, CMA, Beijing, China
推荐引用方式 GB/T 7714	Jiang Y.,Xin J.,Zhao D.,et al. Analysis of differences between thermodynamic and material boundary layer structure: Comparison of detection by ceilometer and microwave radiometer[J],2021,248.
APA	Jiang Y..,Xin J..,Zhao D..,Jia D..,Tang G..,...&Dai L..(2021).Analysis of differences between thermodynamic and material boundary layer structure: Comparison of detection by ceilometer and microwave radiometer.Atmospheric Research,248.
MLA	Jiang Y.,et al."Analysis of differences between thermodynamic and material boundary layer structure: Comparison of detection by ceilometer and microwave radiometer".Atmospheric Research 248(2021).