西北太平洋热带气旋生成的源地和年代际变化特征

An Analysis on Tropical Cyclones’ Source Region and Interdecadal Variation Feature in Western North Pacific (WNP)

摘要: 本文利用1949~2010年的《台风年鉴》资料，分析西北太平洋热带气旋生成的时空变化特征，以及热带气旋生成的源地和强度等之间的特征，结果表明TC形成数量近年来呈现递减的趋势，近10年TC形成总数为多年平均的极小值；热带气旋在南海和西北太平洋生成频数的活跃期分别为6~9月和7~10月；另外热带气旋生成的源地呈现出季节性震荡，且通过分析发现台风生成源地与台风强度的也有关联。

Abstract: This study used the data of tropical Cyclone Yearbook from 1949 to 2010 to analyze the temporal and spatial characteristics of tropical cyclones in Western North Pacific during its formation. The relationship between the formation area and the maximum intensity was also under examination. The results indicated that the number of TCs formed in WNP showed a decreasing trend. The total number of the TCs formed in recent 10 years was a minimum for a 10-year average. The active phases for TC formation on the South China Sea (Western North Pacific) were from June to September (July to October). The results also showed that the formation areas of TCs experienced a seasonal oscillation and had a strong relation with the intensity.