西北太平洋台风累积动能的气候特征  

Climatological Characters for Accumulative Cyclone Energy over Western North Pacific

作　　者：黄丽娜 林笑茹 曾华 庄淑文 

机构地区：[1]福建省莆田市气象局,莆田351100 [2]福建省宁德市气象局

出　　处：《气象》2009年第9期44-50,共7页Meteorological Monthly

摘　　要：利用1945—2008年JTWC提供的台风资料,计算了西北太平洋地区台风累积动能,分析了台风累积动能的时间分布特征,统计累积动能与尼诺3.4区海温的关系。结果表明:每年台风累积动能主要集中在6—12月;累积动能有明显的阶段性;1990年以后极端台风事件发生频数有增加的趋势;6—12月台风累积动能与尼诺3.4区的海温距平呈正相关;台风累积动能与海温的关系通过沃克环流和局地哈得来环流起作用。Based on the 1945 -2008 typhoon data from JTWC, the accumulative cyclone energy （ACE） over the western North Pacific is calculated. The characters and the relationship between ACE and SST in NINO3.4 are analyzed. The following results are obtained. ACE is mostly concentrated in June December. The activity of ACE occurs at regular intervals. After 1990, the frequency of extreme strong typhoon had an increasing tendency obviously. The relationship of ACE in June - December and anomalous SST in NINO3.4 is notable. Abnormal Walker circulation and Hadley cell play an important role in the relationship between ACE and SST.

关 键 词：累积动能 极端台风事件 越赤道气流 沃克环流 

分 类 号：P444[天文地球—大气科学及气象学] O313.2[理学—一般力学与力学基础]