Weather Condition Analysis of a Urban Heavy Pollution Event
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Abstract:
Based on the hourly highdensity meteorological observation data and the Air Quality Index announced by the Ministry of Environmental Protection of China, we discuss and analyze the meteorological conditions of the pollution process from January 9 to 4 February 2014 in the urban area of Mianyang, Sichuan ProvinceThis study is conducted from three aspects: slight, moderate, and severe pollutionAnalysis indicates that the wind speed and the thickness of the atmospheric mixed layer are negatively correlated with the air quality index, with the correlation coefficients being -0637 and -0487The types of air pollution are discussedThe wind speed is negatively correlated with the air quality index in slight pollution with a correlation coefficient of -0739The diurnal variation of wind speed shows a singlepeak trend, with the peak value appearing in 12:00-18:00The wind direction is given priority to the southeast and northwest flow, and the air pollution could be aggravated by the southeast flowThe thickness of the atmospheric mixed layer in the slight pollution condition is 58378 m, and it is 5 m lower in moderate pollution than in severe pollution, 48192 m and 48769 m, respectively While the thickness of the atmospheric mixed layer on the low side, the diurnal variation is characterized as low in the morning and evening, high in the afternoon According to the Blownup Theory, the 〖WTBX〗V〖WTBZ〗3〖WTBX〗θ〖WTBZ〗 plot of the pollution process has instructive effect in forecasting strong convection and precipitation
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.