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This Korea-China study monitored the phenomena of sandstorms and significant dustfall (SD) from 1997 to 2000. The analysis of our data included ground measurements of dust concentration, visibility, satellite imagery, aircraft and lidar observations. In addition, an estimation of atmospheric loadings and a study on the relationship between dust concentrations and visibility were carried out. The movement and invasion of dust clouds to Korea were clearly identified with meteorological and satellite data. The increasing concentrations of TSP and PM10 concurred well with the satellite information. From case studies, we estimated that atmospheric loadings of a dust cloud were over 1 million ton and that the deposition over the Korean Peninsula was in the range from 46 000 to 86 000 tons. For SD with visibility of 3 km, we predict TSP 659 μg m-3 and PM10 493 μg m-3. We recommend the issuance of an SD Watch (advisory) and an SD Warning for the general public.