摘要
采用1951-2005年热带气旋和广东26个测站降水的观测资料,分析了广东热带气旋及其降水的年际变化特征。结果表明:影响广东的热带气旋的个数和年平均强度及其降水均存在明显的年际变化,而且主要有3种空间振荡型态。另外,广东热带气旋降水具有峰值为3年左右周期的显著振荡,该振荡周期在20世纪70年代中期和90年代初期有明显的突变。广东热带气旋降水的年际变化与热带气旋个数的年际变化高度相关,同时跟西北太平洋中高纬40°N-60°N部分区域的台风季节(5-11月份)平均SST年际变化存在显著的负相关。
The interannual variational features of tropical cyclone and its precipitation over Guangdong Province are investigated using the observational data of tropical cyclone and precipitation at 26 observational stations in Guangdong Province from 1951 to 2005. The results show that the number and annual mean intensity of tropical cyclone influencing Guangdong Province all present obviously annual variation. The tropical cyclone precipitation over Guangdong Province presents obviously annual variation, and displays mainly 3 types of spatial oscillation patterns. In addition, the tropical cyclone precipitation over Guangdong Province possesses a distinct oscillation with a peak value about 3-year period, and there are prominent shifts both in the middle 1970s and in the early 1990s for that oscillation period. There are high relationships between the annual variation of the tropical cyclone precipitation over Guangdong Province and that of number of tropical cyclones influencing Guangdong Province. At the same time, the interannual variation of tropical cyclone precipitation over Guangdong Province has a significant negative correlation with that of the mean SST during typhoon season （from May to November） in the partial area of middlehigh latitude between 40°N and 60°N over the northwestern Pacific.
出处
《自然灾害学报》
CSCD
北大核心
2008年第3期140-147,共8页
Journal of Natural Disasters
基金
广东省自然科学基金(5300001)
广东省科技攻关项目(2005B32601007)共同资助
关键词
热带气旋
降水
年际变化
广东省
tropical cyclone
precipitation
interannual variation
Guangdong Province
