Abstract:  Based on the wind direction and wind speed data on 18 weather stations around the northern coast of the Yellow Sea and the Bohai Sea and the NCEP reanalysis data from 1971 to 2008, the temporal and spatial distributions of wind field were analyzed using a statistical method, a wavelet analysis and a weather pattern. The results show that gale is in a significantly decreasing trend around the northern coast of the Yellow Sea and the Bohai Sea. The gale occurs mainly in spring, especially in April, then in November. The wind directions are south and north in half year of summer and in half year of winter, respectively. Weather patterns are divided into four types, i.e. cold front rear type, high pressure rear type, typhoon type and cyclone type. Moreover, cyclone type includes types of Jianghuai cyclone, North China cyclone, Mongolia cyclone and northeast low-pressure. Among them, the frequency of cold front rear type is the highest, then that of the cyclone type, and that of typhoon type is the lowest.

Key words: The Yellow Sea and the Bohai Sea, Coastal gale, Climatic change, Weather pattern