A large scale heavy pollution process occurred from 17 to 27 December 2015 in the eastern china.Using the data of micro pulse lidar and microwave radiometer which located in the pollution center of Xingtai City, analyzed the extinction coefficient, inversion layer, moisture content in the process of pollution.The results showed that:Local meteorological conditions change was the main pollution forming source during the process, the background of the heavy environmental pollution event was stable high-altitude atmospheric circulation and ground pressure, air mass at 100 m altitude played a major role on the accumulation and regional transport of pollutants; The correlation coefficient between extinction coefficient and PM2.5 concentration, vapor pressure were 0.8622, 0.7421, with the increase of PM2.5 concentration and vapor pressure, the extinction coefficient increased exponentially.Extinction coefficient of PM2.5 concentration and vapor pressure build regression equation (R2=0.8811) could be a good characterization of the actual change.The inversion strength reached the maximum in pollution development stage, the moisture content reached the maximum in pollution aggravation stage, the inversion strength and moisture content was a significant decline in pollution mitigation stage.
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