西北太平洋打转台风的时空规律

以西北太平洋打转台风(分为顺时针与逆时针两类)为例,研究了1949～2011年期间打转台风的时空规律.结果表明:打转台风主要发生在洋面,主要分布在110°E～150°E、10°N～30°N区域范围内.台风打转后的发展方向以偏北为主,也有一部分打转后西行,绝大多数顺时针打转台风的打转中心位置随纬度的增加而偏东.打转台风生成的高发期为7～10月,占总数的73.7%,8月份生成次数最多,2月份生成次数最少.我国的南海区域和菲律宾以东洋面是生成打转台风的两个高频区,夏季和秋季是打转台风活动的高发期,夏季的打转台风生成次数稍低于秋季,但是其深入内陆的范围广于秋季,并且台风打转中心位置在夏季达到最北.

The study of the spatio temporal characteristics of turning typhoons in the western north pacific

The paper takes turning typhoons （both clockwise and anticlockwise） in the Western North Pacific as an example, and studies the spatio-temporal characteristics of turning typhoons which happened during the period 1949 - 2011. The study result shows that turning typhoons mainly come out in the ocean area between 110°E - 150°E and 10°N -30°N, and their moving direc- tion is most northward or sometimes westward. With latitude increasing, the centers of most clockwise typhoons are eastward. The high frequency of turning typhoons occurrence is usually from July to October, accounting for 73.7% of the total. There are two high-frequency regions of turning typhoons, one is the South China Sea and the other is the east ocean of Philippines. There are two high-incidence season, summer and autumn. The frequency in summer is lower than in autumn but it makes wider range inland and the center gets to the northernmost.