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《Journal of Anhui Agricultural Sciences》 2010-24
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Influences of Topographic Temperature Inversion on the Pollutant Diffusion in Mudanjiang Mountain Area

YU Hai-jun et al (Department of Atmospheric Sciences,Nanjing University,Nanjing,Jiangsu 210093)  
Using the daily environmental protection air monitoring data and sounding data in detail in Mudanjiang during 2006-2007,the properties of temperature inversion in Mudanjiang mountain area were analyzed. The generating and disappearing laws of temperature inversion,the daily changes of atmospheric pollutants and the concentration change laws of having the temperature inversion or not were studied. The effects of temperature inversion on the diffusion of main atmospheric pollutants were studied. The results showed that temperature inversion in Mudanjiang occurred mainly terrain radiation inversion. The central peaks of temperature inversion intensity appeared at 8:00 and 20:00. The concentration of air pollutants had a greater impact. When the temperature inversion occurred,the concentration of pollutants increased during 5:00-8:00 and 20:00-23:00 and the concentration in different periods was smaller and had no obvious change. Without temperature inversion,the atmosphere was in the state of unstable stratification,it was beneficial to the diffusion of pollutants with small concentration.
【CateGory Index】: X51
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