Asian dust storms are frequently observed over the western Pacific in the spring. Although the bulk of the dust storms travel eastward to Japan and the North Pacific, many of them reach Taiwan. This is particularly the case when there is a winter northeasterly monsoon, which brings Asian continental outflow to the East China Sea and turns toward Taiwan and the South China Sea under the influence of the Siberian high. As a result, the dust storm is frequently associated with long-range transport of air pollutants. The environmental issues of the dust storms and long-range transport of air pollutants are the major subject of this special issue.