西宁地区大气颗粒物污染形成的气象条件数值模拟研究

Numerical Simulation of Atmospheric Particulate Pollution Formation in Xining Area

针对原有西宁地区大气颗粒物污染形成的气象条件数值模拟精度较差的问题,设计新型西宁地区大气颗粒物污染形成的气象条件数值模拟方法。通过对当地污染源进行分析,构建相应CAFPULL大气颗粒物污染扩散模型。采用WRF模式对西宁地区进行气象层级分化,设定相应数值模拟参数,并对当地通风量加以计算。运用海平面地转风计算结果结合数值模拟参数,完成大气颗粒物污染数值模拟。通过误差分析法对数值模拟结果进行评估与分析,得出污染形成气象条件。由此,西宁地区大气颗粒物污染形成的气象条件数值模拟方法完成。进行对比实验,与原有方法相比,此方法进行模拟数值精度高于原有方法。

In view of the poor accuracy of numerical simulation of meteorological conditions for the formation of atmospheric particulate pollution in Xining area,a new numerical simulation method of meteorological conditions for the formation of atmospheric particulate pollution in Xining area was designed.Through the analysis of local pollution sources,the corresponding CAFPULL atmospheric particulate pollution diffusion model is constructed.WRF model was adopted to conduct meteorological hierarchical differentiation in Xining area,set corresponding numerical simulation parameters,and calculate local ventilation volume.The results of sea level geostrophic wind are combined with numerical simulation parameters to complete the numerical simulation of atmospheric particulate pollution.The results of numerical simulation are evaluated and analyzed by error analysis method,and the meteorological conditions of pollution formation are obtained.Thus,the numerical simulation method of atmospheric particulate pollution formation in Xining area was completed.Compared with the original method,the numerical accuracy of this method is higher than that of the original method.