ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 44 Issue 9 > 2018,44(9):1179-1190. DOI:10.7519/j.issn.1000-0526.2018.09.006 Prev Next
Evaluation of Regional Air Quality Numerical Forecasting System in Central China and Its Application for Aerosol Radiative Effect
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Abstract:
Based on a variety of test indicators from June 2015 to February 2016, the six kinds of forecast pollutants (PM10,PM2.5,SO2,NO2,CO,O3) and the AQI index of Air Quality Numerical Forecasting System in Central China were verified. Then the impact of aerosol radiation effect on surface meteorological factors was studied by sensitivity experiments. The results show that the Air Quality Numerical Forecasting System in Central China has stable and good forecasting effect on the six pollutants and AQI in Hubei Province, but the forecast error of O3 is larger and forecast value is higher than the observation. The error could be reduced by the error correction in future. Compared with the CUACE forecasting model, the 24-48 h forecast is better than that of CUACE and the 72 h effect of the two models are similar. The aerosol radiation effect has affected the distribution of surface meteorological field to a certain extent. During this process, the total radiation effect of aerosols reduced the solar radiation by 7.740 W·m-2, 2 m temperature decreased by 0.162℃, plantary boundary layer height decreased by 16.457 m, relative humidity increased by 0.557%, and 10 m wind speed decreased by 0.011 m·s-1. The effect of aerosols on meteorological elements in the daytime is greater than that over night. The reduction of solar radiation, 2 m temperature, boundary layer height, 10 m wind speed and the increase of humidity are not conducive to the spread of pollutants. The increase of pollutants concentration also contributes to the above changes of meteorological conditions, resulting in a bidirectional feedback between meteorological conditions and atmospheric pollution.
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