东沙岛海域近56a热带气旋影响统计分析  

Statistical analysis on the stropical cyclones in Dongsha Island seas in recent 56 years

作　　者：林镇国[1] 罗森波[2] 梁健[2] 

机构地区：[1]兰州大学大气科学院,甘肃兰州730000 [2]广州中心气象台,广东广州510080

出　　处：《台湾海峡》2007年第4期472-475,共4页Journal of Oceanography In Taiwan Strait

基　　金：广州中心气象台"广东省台风预报服务业务系统"课题(编号:200606)资助

摘　　要：本文利用1949～2005年TC年鉴资料,对经过东沙岛附近海域约200km范围内的热带气旋（下简称TC）影响情况进行了分析,结果表明：（1）近56a共有288个TC影响东沙岛附近海域,平均每年5个左右.2000年以后影响个数有下降趋势;（2）年度最早影响的TC是4月9日,最晚影响的是12月27日;（3）7、8、9月3个月最多,约占影响总个数的2/3,影响该区的TC中STS和TY两种级别约占一半;（4）近10a大约有40个TC影响该海域,平均风速为22m/s,极大风速达到55m/s.With TC data from 1949 to 2005, we analyzes the situation of TC influence the waters around 200km of Dongsha Islands. The results indicated that in recent 56 years there were 288 TC affecting Dongsha Island seas, in frequency of 5 times per year. Since 2000, the affects tended to decrease. Secondly,the first TC influence occurred on April 9 and the latest December 27. The third, July, August and September were the seasons TC influenced the most, in approximately the rate 2/3 of the total. The ranks STS and TY were composed approximately 1/2 of the total. The last, there were 40 TC affected the areas in recent 10 years. The average wind power was about 22m/s with maximum wind speed at 55m/s.

关 键 词：东沙岛海域 TC影响 统计分析 

分 类 号：P732.3[天文地球—海洋科学]