A three-dimensional climate model is used to investigate the climatic effects of aerosols in the boundary layer. Results show that these aerosols could lead to noticeablechange in the climate conditions both of the atmosphere and at the ground. The temperature of the air column rises below 300hPa in contrast to that of the surface and soil. Over the desert areas where the aerosol optical thickness is big,there occur cyclonic differential circu-lations in the horizontal windfields, with change observed in vertical motion. A very goodpositive correlation is found between the changes of precipitation and 300hPa rising. Finally,the physical mechanism of the climatic effects of aerosols is examined.