Five-year observation of aerosol optical properties and its radiative effects to planetary boundary layer during air pollution episodes in North China: Intercomparison of a plain site and a mountainous site in Beijing

被引：44

作者：

Zheng, Yu ^{[1
,2
,3
]}

Che, Huizheng ^{[2
,3
]}

Xia, Xiangao ^{[4
,5
]}

Wang, Yaqiang ^{[2
,3
]}

Wang, Hong ^{[2
,3
]}

Wu, Yunfei ^{[6
]}

Tao, Jun ^{[7
]}

Zhao, Hujia ^{[2
,3
]}

An, Linchang ^{[8
]}

Li, Lei ^{[2
,3
]}

Gui, Ke ^{[2
,3
]}

Sun, Tianze ^{[2
,3
]}

Li, Xiaopan ^{[2
,3
]}

Sheng, Zhizhong ^{[2
,3
]}

Liu, Chao ^{[2
,3
,9
]}

Yang, Xianyi ^{[2
,3
]}

Liang, Yuanxin ^{[2
,3
]}

Zhang, Lei ^{[2
,3
]}

Liu, Chong ^{[10
]}

Kuang, Xiang ^{[1
]}

Luo, Shi ^{[1
]}

You, Yingchang ^{[1
]}

Zhang, Xiaoye ^{[2
,3
]}

机构：

[1] Nanjing Univ Informat Sci & Technol, Joint Int Res Lab Climate & Environm Change,China, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Key Lab Meteorol Disaster,Minist Educ,Key Lab Aer, Nanjing 210044, Jiangsu, Peoples R China

[2] CMA, State Key Lab Severe Weather LASW, Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China

[3] CMA, Inst Atmospher Composit, Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China

[4] Chinese Acad Sci, Lab Middle Atmosphere & Global Environm Observat, Inst Atmospher Phys, Beijing 100029, Peoples R China

[5] Univ Chinese Acad Sci, Sch Geosci, Beijing 100049, Peoples R China

[6] Chinese Acad Sci, CAS Key Lab Reg Climate Environm Temperate East A, Inst Atmospher Phys, Beijing 100029, Peoples R China

[7] Minist Environm Protect, South China Inst Environm Sci, Guangzhou 510655, Guangdong, Peoples R China

[8] CMA, Natl Meteorol Ctr, Beijing 100081, Peoples R China

[9] Henan Polytech Univ, Sch Surveying & Land Informat Engn, Jiaozuo 454000, Henan, Peoples R China

[10] Nanjing Univ, Sch Atmospher Sci, Nanjing 210093, Jiangsu, Peoples R China

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2019年 / 674卷

基金：

中国国家自然科学基金;

关键词：

Aerosol optical properties; Radiative effects; Planetary boundary layer; Dust; Haze; Beijing; ENHANCED HAZE POLLUTION; SENSING NETWORK CARSNET; JING-JIN-JI; BLACK CARBON; EAST-ASIA; WAVELENGTH DEPENDENCE; CHEMICAL-COMPOSITION; REGIONAL TRANSPORT; SURROUNDING REGION; SIZE-DISTRIBUTION;

D O I：

10.1016/j.scitotenv.2019.03.418

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The aerosol microphysical, optical and radiative properties of the whole column and upper planetary boundary layer (PBL) were investigated during 2013 to 2018 based on long-term sun-photometer observations at a surface site (similar to 106 m a.s.l.) and a mountainous site (similar to 1225 m a.s.l.) in Beijing. Raman-Mie lidar data combined with radiosonde data were used to explore the aerosol radiative effects to PBL during dust and haze episodes. The results showed size distribution exhibited mostly bimodal pattern for the whole column and the upper PBL throughout the year, except in July for the upper PBL, when a trimodal distribution occurred due to the coagulation and hygroscopic growth of fine particles. The seasonal mean values of aerosol optical depth at 440 nm for the upper PBL were 0.31 +/- 0.34, 0.30 +/- 0.37, 0.17 +/- 0.30 and 0.14 +/- 0.09 in spring, summer, autumn and winter, respectively. The single-scattering albedo at 440 nm of the upper PBL varied oppositely to that of the whole column, with the monthly mean value between 0.91 and 0.96, indicating weakly to slightly strong absorptive ability at visible spectrum. The monthly mean direct aerosol radiative forcing at the Earth's surface and the top of the atmosphere varied from -40 +/- 7 to -105 +/- 25 and from -18 +/- 4 to -49 +/- 17 W m(-2), respectively, and the maximum atmospheric heating was found in summer (similar to 66 +/- 12 W m(-2)). From a radiative point of view, during dust episode, the presence of mineral dust heated the lower atmosphere, thus promoting vertical turbulence, causing more air pollutants being transported to the upper air by the increasing PBLH. In contrast, during haze episode, a large quantity of absorbing aerosols (such as black carbon) had a cooling effect on the surface and a heating effect on the upper atmosphere, which favored the stabilization of PBL and occurrence of inversion layer, contributing to the depression of the PBLH. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：140 / 158

页数：19

共 153 条

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