【作者】 林镇国； 罗森波；

【Author】 Lin Zhenguo[1,2], Luo Senbo[2], Liang Jian[2] (1. College Of Atmospheric Science Lanzhou University, Gansu Lanzhou 730000) (2. Guangzhou Central Meteorological Observatory, Guangdong Guangzhou 510080)

【机构】 广州中心气象台；

【摘要】 南海资源丰富,海上生产频繁,安全要求高,关于某海区上热带气旋(下简称TC)影响分析文章较少。本文利用1949～2005年TC年鉴资料,分析经过东沙岛附近约200公里范围内TC影响情况,以及近10年该区的TC情况。分析表明:⑴近56年共约有288个TC影响东沙岛附近海域,平均大概每年有5个左右,2000年以后影响个数有下降趋势;⑵年度最早影响的TC是4月9日,最晚影响的是12月27日;⑶按月份统计7、8、9三个月的影响占最多,约占所有影响个数总和的2/3,按强度统计影响该区的TC中STS和TY两种级别约占一半;⑷近10年大约有40个左右TC影响该海域,平均影响风力为22m/s左右,极端最大风力达到55m/s。通过上述分析,目的是为在该区从事海上作业提供背景资料,为生产和减灾提供决策参考依据。更多还原

【Abstract】 South China Sea resources rich, marine production frequent, the safely requests high, the analysis article to be less which about some sea area affecting with tropical cyclone. This article uses the TC data from 1949 to 2005 , analyzes after Dongsha Island nearby approximately in 200 kilometers scopes the TC influence situation, as well as nearly 10 years this area TC situation. The analysis indicated that:(1) In the recent 56 years altogether approximately have 288 TC to affect nearby Dongsha Island the sea area, equally probably every year have about 5, After 2000 year later, the affects have a drop tendency; (2) Every year most early affects TC is on April 9, the latest influence is on December 27; (3) According with monthly,the long influences is Jul,Aug and September, approximately composes all influences integer sum 2/3 of the total, affects this area according to the intensity statistics in TC is STS and TY two kind of ranks ,and approximately composes one half; (4) In the recent 10 years probably have about 40 TC to affect this sea area, the average influence wind power are about 22m/s, the extreme biggest wind power achieves 55m/s. Through the above analysis.更多还原