This study could be mainly separated into two parts: 1) used Lidar to profile the vertical property of atmosphere aerosol, including determination of height and aerosol trajectory tracing; 2) used satellite to analyze the large scale distribution and propagation of aerosol in 2003. The results could figure out the three-dimension distribution of aerosol particles and trace back their sources. In satellite part, the high temporal resolution GMS-5 data were employed, and real time information of sandstorms which usually are the biggest aerosol sources, could be provided. The result revealed that the sandstorms made a important influence to the areas around northern eastern Taiwan and the Taiwan Strait from January to April, especially in January. The result also showed that the AI (Aerosol Index) derived from GMS could make a great aid in monitoring the whole lifecycles of sandstorms and could be used to estimate the sandstorms’ impact. In Lidar part, the transformation and distribution of sandstorms could be detailed understood based on the backward scattering and polarization analysis companying with satellite data. All five sandstorm events announced by EPA were analyzed. The strongest one occurred during 2/18 ~ 2/19 (Case 1), and the weakest one occurred during 4/25 ~ 4/28 (Case 5). All of the five events’ parameters were detailed analyzed to give the aerosol property around Taiwan area when were impacted by the sandstorms from the Mainland China and haze from the southeastern Asia.

sandstorm,satellite remote sensing,Lidar