Numerical simulation on the transportation feature of pollution in the city group of middle Liaoning

MM5v3.7 was used to simulate the boundary layer characteristics of the city group in middle Liaoning,based on the data of January and July in 2002 representing winter and summer,respectively.And the distributions of average wind fields on each layer were mainly analyzed.The results showed that the main atmospheric pollutant was imported to Liaoning whether winter or summer,and this will bring in local pollution of the city group in winter,but it will make nothing serious pollution in summer.