气候变化领域集成服务门户(CCPortal): The thermodynamic structures of the planetary boundary layer dominated by synoptic circulations and the regular effect on air pollution in Beijing

CCPortal

DOI	10.5194/acp-21-6111-2021
	The thermodynamic structures of the planetary boundary layer dominated by synoptic circulations and the regular effect on air pollution in Beijing
	Jiang Y.; Xin J.; Wang Y.; Tang G.; Zhao Y.; Jia D.; Zhao D.; Wang M.; Dai L.; Wang L.; Wen T.; Wu F.
发表日期	2021
ISSN	1680-7316
起始页码	6111
结束页码	6128
卷号	21 期号:8
英文摘要	To investigate the impacts of multiscale circulations on the planetary boundary layer (PBL), we have carried out the PBL thermodynamic structure field experiment with a Doppler wind profile lidar, a microwave radiometer, and a ceilometer from January 2018 to December 2019 in Beijing. We found that the direct regulatory effect of synoptic circulation worked through transporting and accumulating pollutants in front of mountains in the daytime, while the indirect effect of multiscale circulations worked through coupling mechanisms in the nighttime. The horizontal coupling of different-direction winds produced a severe pollution convergent zone. The vertical coupling of upper environmental winds and lower regional breezes regulated the mixing and diffusion of pollutants by generating dynamic wind shear and advective temperature inversion. We also found that the dominating synoptic circulations led to great differences in PBL thermodynamic structure and pollution. The cyclonic circulation resulted in a typical multilayer PBL characterized by high vertical shear (600 m), temperature inversion (900 m), and an inhomogeneous stratification. Meanwhile, strong regional breezes pushed the pollution convergent zone to the south of Beijing. The southwesterly circulation resulted in a mono-layer PBL characterized by low vertical shear (400 m) and inversion (200 m). The westerly circulation led to a hybrid-structure PBL, and the advective inversion was generated by the vertical shear of zonal winds. Strong environmental winds of southwesterly and westerly circulations pushed the severe-pollution zone to the front of mountains. There was no distinct PBL structure under the anticyclone circulation. The study systematically revealed the appreciable effects of synoptic and regional circulations on PBL structure and air quality, which enriched the prediction theory of atmospheric pollution in the complex terrain. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	air quality; atmospheric circulation; atmospheric pollution; boundary layer; complex terrain; pollutant transport; radiometer; synoptic meteorology; thermodynamics; wind field; zonal wind; Beijing [Beijing (ADS)]; Beijing [China]; China
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246954
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; College of Earth Science and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, 210044, China; College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China; Institute of Atmospheric Composition, Chinese Academy of Meteorological Science, Beijing, 100081, China
推荐引用方式 GB/T 7714	Jiang Y.,Xin J.,Wang Y.,et al. The thermodynamic structures of the planetary boundary layer dominated by synoptic circulations and the regular effect on air pollution in Beijing[J],2021,21(8).
APA	Jiang Y..,Xin J..,Wang Y..,Tang G..,Zhao Y..,...&Wu F..(2021).The thermodynamic structures of the planetary boundary layer dominated by synoptic circulations and the regular effect on air pollution in Beijing.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(8).
MLA	Jiang Y.,et al."The thermodynamic structures of the planetary boundary layer dominated by synoptic circulations and the regular effect on air pollution in Beijing".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.8(2021).