Using a two-dimensional spectral resolving cloud model,the effects of mineral dust particles,produced under different weather conditions,on development of cloud microphysical and optical properties and precipitation are simulated and compared with the results obtained under background aerosol conditions.The results show that dust particles raised during duststorms increase the amount of large and giant cloud condensation nuclei in the atmosphere,lead to more large droplets activated at the early stage of cloud formation,accelerate the formation of precipitation,and increase the amount of precipitation in both warm and cold clouds,while the influence of increasing in giant cloud condensation nuclei on the cloud optical properties and albedo can be neglected.The results also indicate that when sand dust acts as both cloud condensation nuclei and ice nuclei,increasing the initial concentration of ice nuclei results in a decrease in the effective radii of cloud particles,and inhibits precipitation formation.The increasing amount of ice nuclei enhances the cloud optical depth and albedo.