摘要
用中国气象局组织整编的《台风年鉴》资料和全球近表层简易海洋数据同化(SODA)资料,研究了近50年南海海域生成和经过的热带气旋位置点频数的时空分布特征及其海洋影响因子。结果表明,6～10月的热带气旋位置点频数表现出明显的地理分布集聚性特征,主要分布在南海15～22°N海域,并有明显的年代际变化特征。在1975年以前,海洋因子对南海海域生成和经过的热带气旋位置点频数的影响主要以La Nia和类La Nia事件为主,1975年之后以El Nio和类El Nio事件为主。
The characteristics of temporal and spatial distribution of tropical cyclone frequencies over the South China Sea areas and its affecting factors in the past 50yrs are analyzed based on typhoon data that provided by CMA and Simple Ocean Data Assimilation （SODA）. The results show that the tropical cyclone frequencies from June to October show concentrated geographic distribution, for they mainly distribute over the SCS area from 15-20 °N. The characteristics present significant interdecadal changes. The impact of oceanic factors on the tropical cyclone frequencies in the SCS area is mainly realized by La Nina and La Nifia-like events before 1975 but mainly by E1 Nino and E1 Nino-like events after 1975.
出处
《热带气象学报》
CSCD
北大核心
2007年第4期341-347,共7页
Journal of Tropical Meteorology
基金
广东省科技计划项目"广东干旱年景预测技术研究"(2005B32601007)
热带海洋气象科学研究基金项目"南海台风-浪-风暴潮耦合试验及台风灾害预估"共同资助
关键词
南海
热带气旋位置点频数
时空分布
影响因子
South China Sea
tropical cyclone frequencies
temporal and spatial distribution
affecting factors
