This paper introduced several important issues on applying ground-based automatic sun-sky radiometer CE318 for aerosol remote sensing in Polar Region. Due to extremely low temperature and special weather condition like big wind in Polar R egion

scientists usually meet some particular problems when performing aerosol remote sensing based on direct sun and diffused sky light measurements. Following sun-sky radiometer CE318 measurements at polar region

this paper discussed （ 1） the importance and application of temperature correction to aerosol optical depth measurements in polar region; （ 2） temperature effects when performing instrument calibration in polar region using Langley plot method; （ 3） using diffused sky light in the retrieval of aerosol microphysical and optical properties to choose observation geometry. These studies can provide reference for performing ground-based aerosol remote sensing using automatic sun-sky radiometer in Polar Regions

and support satellite remote sensing of polar aerosol as well as assessment of its climate effects.