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人为大气污染物对一次冬季浓雾形成发展的影响研究
引用本文:贾星灿,郭学良.人为大气污染物对一次冬季浓雾形成发展的影响研究[J].大气科学,2012,36(5):995-1008.
作者姓名:贾星灿  郭学良
作者单位:1.中国科学院大气物理研究所云降水物理与强风暴实验室,北京 100029;中国科学院研究生院,北京 100049
基金项目:公益性行业 (气象) 科研专项GYHY200806001,国家科技支撑计划2006BAC12B03
摘    要:基于WRF/Chem模式和雾的观测资料,开展了包含和不包含人为污染排放源两种大气背景条件下的数值模拟对比试验,在此基础上探讨了人为污染物对2009年12月1日发生在我国华北和华东地区的一次浓雾天气过程的影响机理.结果表明,在考虑污染排放源时,模式模拟的雾的空间分布和强度变化与卫星、能见度仪和微波辐射计的观测更为接近.污...

关 键 词:大气污染  雾形成  WRF/Chem模拟
收稿时间:2011/10/26 0:00:00
修稿时间:3/8/2012 12:00:00 AM

Impacts of Anthropogenic Atmospheric Pollutant on Formation and Development of a Winter Heavy Fog Event
JIA Xingcan and GUO Xueliang.Impacts of Anthropogenic Atmospheric Pollutant on Formation and Development of a Winter Heavy Fog Event[J].Chinese Journal of Atmospheric Sciences,2012,36(5):995-1008.
Authors:JIA Xingcan and GUO Xueliang
Affiliation:1.Laboratory of Cloud and Precipitation and Severe Storms, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;Graduate University of Chinese Academy of Sciences, Beijing 1000492.Laboratory of Cloud and Precipitation and Severe Storms, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;Chinese Academy of Meteorological Sciences, Beijing 100081
Abstract:The WRF/Chem model coupled with local anthropogenic atmospheric pollution emissions and fog observational data were used to assess the effects of human-induced pollutants on a heavy fog event on 1 Dec 2009 in North China and East China. The experiments with and without anthropogenic emissions were designed and conducted. The results suggest that the simulated fog distribution and intensity with anthropogenic emission are closer to observed ones. The polluted atmospheric boundary condition is found to create a favorable condition for fog formation, increasing the fog area up to 50%, the intensity of 5 times in maximum, and the duration of 1.5 h on average. Compared with that under clean air condition, the number concentration of fog condensation nuclei (FCN) is much higher in polluted air, which causes a higher fog droplet number concentration, and influences the processes of droplet condensation, long wave radiation, turbulent motion, and provides the favorable dynamic and thermal boundary conditions for fog development. The secondary aerosols produced by trace gases SO2, NOx, and NH3 make great influence on the formation and development of fog, and the averaged liquid water content has a decrease of 32%, without these trace gas emission.
Keywords:pollutant  fog formation  WRF/Chem simulation
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