Aerosol and boundary-layer interactions and impact on air quality

查看全文 作　　者：Zhanqing [1,2]Li;Jianping [3]Guo;Aijun [4]Ding;Hong [5]Liao;Jianjun [2]Liu;Yele [6,7]Sun;Tijian [4]Wang;Huiwen [8]Xue;Hongsheng [8]Zhang;Bin [9]Zhu

机构地区：[1]State Key Laboratory of Earth Surface Processes and Resource Ecology,GCESS,Beijing Normal University,Bejing 100875,China;[2]Department of Atmospheric and Oceanic Sciences,University of Maryland,MD 21029,USA;[3]State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081,China;[4]School of Atmospheric Sciences,Nanjing University,Nanjing 210023,China;[5]School of Environmental Science and Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China;[6]State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;[7]Center for Excellence in Regional Atmospheric Environment,Institute Chinese Academy of Sciences,Xiamen 361021,China;[8]Department of Atmospheric and Oceanic Sciences,Peking University,Beijing 100871,China;[9]School of Atmospheric Physics,Nanjing University of Information Science and Technology,Nanjing 210044,China

出　　处：《National Science Review》索引2017年第4卷第6期,共24页

基　　金：supported by the National Haze Research Program of the Natural Science Foundation of China(91544217,91544229,91544230,91544231 and91744207);the National Basic Research Program on Global Change(2013CB955804);the National Natural Science Foundation of China(41471301 and 41771399);National Science Foundation of US(5245880);Chinese Academy of Meteorological Sciences(2017Z005) 摘　　要：Air quality is concerned with pollutants in both the gas phase and solid or liquid phases. The latter are referred to as aerosols, which are multifaceted agents affecting air quality, weather and climate through many mechanisms. Unlike gas pollutants, aerosols interact strongly with meteorological variables with the strongest interactions taking place in the planetary boundary layer(PBL). The PBL hosting the bulk of aerosols in the lower atmosphere is affected by aerosol radiative effects. Both aerosol scattering and absorption reduce the amount of solar radiation reaching the ground and thus reduce the sensible heat fluxes that drive the diurnal evolution of the PBL. Moreover, aerosols can increase atmospheric stability by inducing a temperature inversion as a result of both scattering and absorption of solar radiation, which suppresses dispersion of pollutants and leads to further increases in aerosol concentration in the lower PBL.Such positive feedback is especially strong during severe pollution events. Knowledge of the PBL is thus crucial for understanding the interactions between air pollution and meteorology. A key question is how the diurnal evolution of the PBL interacts with aerosols, especially in vertical directions, and affects air quality.We review the major advances in aerosol measurements, PBL processes and their interactions with each other through complex feedback mechanisms, and highlight the priorities for future studies. 关键词：AEROSOL PBL RADIATION aerosol-PBL interaction climate change

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Aerosol and boundary-layer interactions and impact on air quality

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