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DOI10.5194/acp-21-5705-2021
A study of the effect of aerosols on surface ozone through meteorology feedbacks over China
Qu Y.; Voulgarakis A.; Wang T.; Kasoar M.; Wells C.; Yuan C.; Varma S.; Mansfield L.
发表日期2021
ISSN1680-7316
起始页码5705
结束页码5718
卷号21期号:7
英文摘要

Interactions between aerosols and gases in the atmosphere have been the focus of an increasing number of studies in recent years. Here, we focus on aerosol effects on tropospheric ozone that involve meteorological feedbacks induced by aerosol-radiation interactions. Specifically, we study the effects that involve aerosol influences on the transport of gaseous pollutants and on atmospheric moisture, both of which can impact ozone chemistry. For this purpose, we use the UK Earth System Model (UKESM1), with which we performed sensitivity simulations including and excluding the aerosol direct radiative effect (ADE) on atmospheric chemistry, and focused our analysis on an area with a high aerosol presence, namely China. By comparing the simulations, we found that ADE reduced shortwave radiation by 11 % in China and consequently led to lower turbulent kinetic energy, weaker horizontal winds and a shallower boundary layer (with a maximum of 102.28 m reduction in north China). On the one hand, the suppressed boundary layer limited the export and diffusion of pollutants and increased the concentration of CO, SO2, NO, NO2, PM2.5 and PM10 in the aerosol-rich regions. The NO/NO2 ratio generally increased and led to more ozone depletion. On the other hand, the boundary layer top acted as a barrier that trapped moisture at lower altitudes and reduced the moisture at higher altitudes (the specific humidity was reduced by 1.69 % at 1493 m on average in China). Due to reduced water vapour, fewer clouds were formed and more sunlight reached the surface, so the photolytical production of ozone increased. Under the combined effect of the two meteorology feedback methods, the annual average ozone concentration in China declined by 2.01 ppb (6.2 %), which was found to bring the model into closer agreement with surface ozone measurements from different parts of China.

. © 2021 EDP Sciences. All rights reserved.
语种英语
scopus关键词aerosol; atmospheric chemistry; atmospheric gas; boundary layer; climate feedback; concentration (composition); meteorology; model test; ozone; radiative forcing; shortwave radiation; troposphere; wind field; 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/246975
作者单位School of Atmospheric Sciences, Nanjing University, Nanjing, China; Leverhulme Centre for Wildfires, Environment and Society, Department of Physics, Imperial College London, London, United Kingdom; School of Intelligent Science and Control Engineering, Jinling Institute of Technology, Nanjing, China; School of Environmental Engineering, Technical University of Crete, Crete, Greece; School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, China
推荐引用方式
GB/T 7714
Qu Y.,Voulgarakis A.,Wang T.,et al. A study of the effect of aerosols on surface ozone through meteorology feedbacks over China[J],2021,21(7).
APA Qu Y..,Voulgarakis A..,Wang T..,Kasoar M..,Wells C..,...&Mansfield L..(2021).A study of the effect of aerosols on surface ozone through meteorology feedbacks over China.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(7).
MLA Qu Y.,et al."A study of the effect of aerosols on surface ozone through meteorology feedbacks over China".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.7(2021).
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