DOI: 10.1016/j.atmosenv.2017.08.054
Scopus记录号: 2-s2.0-85028454207
论文题名: Distinguishing the roles of meteorology, emission control measures, regional transport, and co-benefits of reduced aerosol feedbacks in “APEC Blue”
作者: Gao M ; , Liu Z ; , Wang Y ; , Lu X ; , Ji D ; , Wang L ; , Li M ; , Wang Z ; , Zhang Q ; , Carmichael G ; R
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 167 起始页码: 476
结束页码: 486
语种: 英语
英文关键词: Aerosol feedbacks
; APEC Blue
; BC absorption
; Emission controls
; Meteorology conditions
Scopus关键词: Aerosols
; Air pollution
; Air quality
; Atmospheric movements
; Boundary layers
; Meteorology
; Pollution control
; APEC Blue
; Boundary layer heights
; Chemical compositions
; Economic Co-operation
; Emission control measures
; Meteorological condition
; Meteorological variables
; PM2.5 concentration
; Emission control
; absorption
; aerosol
; air quality
; Asian Pacific Economic Cooperation Forum
; atmospheric pollution
; black carbon
; chemical composition
; climate conditions
; concentration (composition)
; emission control
; feedback mechanism
; international cooperation
; meteorology
; particulate matter
; scattering
; transport process
; weather
; absorption
; aerosol
; air pollution control
; air quality
; Article
; boundary layer
; chemical composition
; China
; concentration (parameters)
; environmental temperature
; humidity
; meteorology
; particulate matter
; priority journal
; velocity
; weather
; wind
; Beijing [China]
; China
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Air quality are strongly influenced by both emissions and meteorological conditions. During the Asia Pacific Economic Cooperation (APEC) week (November 5–11, 2014), the Chinese government implemented unprecedented strict emission control measures in Beijing and surrounding provinces, and then a phenomenon referred to as “APEC Blue” (rare blue sky) occurred. It is challenging to quantify the effectiveness of the implemented strict control measures solely based on observations. In this study, we use the WRF-Chem model to distinguish the roles of meteorology, emission control measures, regional transport, and co-benefits of reduced aerosol feedbacks during APEC week. In general, meteorological variables, PM2.5 concentrations and PM2.5 chemical compositions are well reproduced in Beijing. Positive weather conditions (lower temperature, lower relative humidity, higher wind speeds and enhanced boundary layer heights) play important roles in “APEC Blue”. Applying strict emission control measures in Beijing and five surrounding provinces can only explain an average decrease of 17.7 μg/m3 (−21.8%) decreases in PM2.5 concentrations, roughly more than half of which is caused by emission controls that implemented in the five surrounding provinces (12.5 μg/m3). During the APEC week, non-local emissions contributed to 41.3% to PM2.5 concentrations in Beijing, and the effectiveness of implementing emission control measures hinges on dominant pathways and transport speeds. Besides, we also quantified the contribution of reduced aerosol feedbacks due to strict emission control measures in this study. During daytime, co-benefits of reduced aerosol feedbacks account for about 10.9% of the total decreases in PM2.5 concentrations in urban Beijing. The separation of contributions from aerosol absorption and scattering restates the importance of controlling BC to accelerate the effectiveness of aerosol pollution control. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82769
Appears in Collections: 气候变化事实与影响
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作者单位: Center for Global and Regional Environmental Research, The University of Iowa, Iowa City, IA, United States; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Laboratory for Climate and Ocean–Atmosphere Sciences, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China; Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, China
Recommended Citation:
Gao M,, Liu Z,, Wang Y,et al. Distinguishing the roles of meteorology, emission control measures, regional transport, and co-benefits of reduced aerosol feedbacks in “APEC Blue”[J]. Atmospheric Environment,2017-01-01,167