关键词: 风场类型, 风区域, 中国海, 聚类分析, 风场自动分类

Abstract: In order to systematically study the statistical characters of coastal near-surface wind over the China Sea, a division for wind regions and an automated classification for wind fields were realized through cluster analysis. Four wind regions and 31 wind patterns were obtained. Wind regions show the correlations of wind speed among different parts of the China Sea. Identified wind patterns include the typical wind fields of monsoons, and wind fields reflecting frequently occurring synoptic systems. Wind fields in the transition periods between monsoons and wind fields in the whole year were also identified. Besides mean wind speed, other meteorological factors, including temperature and humidity, are also significantly affected by the patterns. Investigation of occurrence frequencies, timing, mean wind speed and wind direction distribution of wind patterns reveal the statistical characters of coastal near-surface wind over the China Sea.

Key words: wind pattern, wind region, the China Sea, cluster analysis, automated classification