摘要
分析了造成 1 998年长江流域特大洪涝灾害的大尺度热带环流成因。指出1 998年处在热带环流强度偏弱的气候阶段 ,西太平洋暖池地区对流活动偏弱 ,南海热带夏季风持续异常偏弱 ,副热带夏季风偏强是造成长江持续强降水的主要原因 ;西太平洋热带对流层高低层环流系统的异常分布 ,为 1 998年长江特大洪涝提供了有利的环流背景。还探讨了热带环流异常影响我国夏季降水的可能途径 ,它们的关系在1 998年夏季降水预测中得到应用。
This paper investigates the relationship between tropical circulation anomaly and the Yangtze River basin flooding in 1998.It is indicated that the circulation anomaly patterns of upper and lower troposphere in tropical western Pacific provide favorable circulation background for the Yangtze River flooding.In 1998, the tropical circulation and the convective activities in the NW Pacific warm pool region are both in the weak stage of the climate fluctuations, South China Sea summer monsoon is sustainable weak, subtropical summer monsoon is stronger.These conditions are also favorable to the more rainfall in the Yangtze River region.The mechanism of the effects of tropical circulation on the summer rainfall in China is also proposed.The relationship is applied to prediction.
出处
《南京气象学院学报》
CSCD
北大核心
2001年第4期467-475,共9页
Journal of Nanjing Institute of Meteorology
基金
国家"九五"重中之重科技项目 96 - 90 8- 0 4- 0 4
"1998年长江
嫩江流域特大暴雨的在及预报应用研究"项目 0 2专题
关键词
夏季风
热带环流
长江流域
1998年
洪涝灾害
summer monsoon,tropical circulation,flooding in the Yangtze River basin
