Vertical observations of the atmospheric boundary layer structure over Beijing urban area during air pollution episodes

doi:10.5194/acp-19-6949-2019

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（2010~）

	Vertical observations of the atmospheric boundary layer structure over Beijing urban area during air pollution episodes
	Wang, Linlin 1,2; Liu, Junkai 1,5; Gao, Zhiqiu 1; Li, Yubin 2; Huang, Meng 2; Fan, Sihui 2; Zhang, Xiaoye 3; Yang, Yuanjian 2,6; Miao, Shiguang 4; Zou, Han 1; Sun, Yele 1; Chen, Yong 1; Yang, Ting 1
通讯作者	Gao, Zhiqiu(zgao@mail.iap.ac.cn)
	2019-05-23
发表期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
卷号	19 期号:10 页码:6949-6967
摘要	We investigated the interactions between the air pollutants and the structure of the urban boundary layer (UBL) over Beijing by using the data mainly obtained from the 325m meteorological tower and a Doppler wind lidar during 1-4 December 2016. Results showed that the pollution episodes in this period could be characterized by low surface pressure, high relative humidity, weak wind, and temperature inversion. Compared with a clean daytime episode that took place on 1 December, results also showed that the attenuation ratio of downward shortwave radiation was about 5 %, 24% and 63% in afternoon hours (from 12:00 to 14:00 local standard time, LST) on 2-4 December, respectively, while for the net radiation (R n) attenuation ratio at the 140m level of the 325m tower was 3 %, 27% and 68 %. The large reduction in R n on 4 December was not only the result of the aerosols, but also clouds. Based on analysis of the surface energy balance at the 140m level, we found that the sensible heat flux was remarkably diminished during daytime on polluted days and even negative after sunrise (about 07: 20 LST) till 14: 00 LST on 4 December. We also found that heat storage in the urban surface layer played an important role in the exchange of the sensible heat flux. Owing to the advantages of the wind lidar having superior spatial and temporal resolution, the vertical velocity variance could capture the evolution of the UBL well. It clearly showed that vertical mixing was negatively related to the concentrating of pollutants, and that vertical mixing would also be weakened by a certain quantity of pollutants, and then in turn worsened the pollution further. Compared to the clean daytime on 1 December, the maximums of the boundary layer height (BLH) decreased about 44% and 56% on 2- 3 December, when the average PM2.5 (PM1) concentrations in afternoon hours (from 12:00 to 14:00 LST) were 44 (48) mu g m(-3) and 150 (120) mu g m(-3). Part of these reductions of the BLH was also contributed by the effect of the heat storage in the urban canopy.
DOI	10.5194/acp-19-6949-2019
关键词[WOS]	NORTH CHINA PLAIN ; SURFACE-ENERGY BALANCE ; ANTHROPOGENIC HEAT ; SEVERE HAZE ; METEOROLOGICAL CONDITIONS ; AEROSOL POLLUTION ; SEVERE FOG ; IMPACT ; PM2.5 ; EVENT
收录类别	SCI ; SCI
语种	英语
资助项目	National Key Research and Development Program of Ministry of Science and Technology of China[2016YFC0203304] ; National Key Research and Development Program of Ministry of Science and Technology of China[2017YFC0209601] ; State Key Laboratory of Loess and Quaternary Geology[SKLLQG1842]
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
项目资助者	National Key Research and Development Program of Ministry of Science and Technology of China ; State Key Laboratory of Loess and Quaternary Geology
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000468810000005
出版者	COPERNICUS GESELLSCHAFT MBH
引用统计	被引频次：45[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/13914
专题	黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Gao, Zhiqiu
作者单位	1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 2.Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing 210044, Jiangsu, Peoples R China 3.Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China 4.China Meteorol Adm, Inst Urban Meteorol, Beijing 100081, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Wang, Linlin,Liu, Junkai,Gao, Zhiqiu,et al. Vertical observations of the atmospheric boundary layer structure over Beijing urban area during air pollution episodes[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(10):6949-6967.
APA	Wang, Linlin.,Liu, Junkai.,Gao, Zhiqiu.,Li, Yubin.,Huang, Meng.,...&Yang, Ting.(2019).Vertical observations of the atmospheric boundary layer structure over Beijing urban area during air pollution episodes.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(10),6949-6967.
MLA	Wang, Linlin,et al."Vertical observations of the atmospheric boundary layer structure over Beijing urban area during air pollution episodes".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.10(2019):6949-6967.