摘要
文章探讨了长江中下游夏季暴雨前期青藏高原春季各层次地温的分布特征，重点讨论了１９９８ 年夏季长江中下游暴雨前期春季高原的三维热力结构，以及其三维热力结构与其它涝年的相似性，尤其是１９９８ 年春季高原地温分布呈现出与其它涝年春季相似的特征；数值模拟试验也证实了１９９８ 年春季青藏高原下垫面三维热力结构特征，对长江中下游夏季降水存在着显著影响．青藏高原春季地温在中部等大部分地区为负距平，南部及东部边缘为正距平时，长江中下游地区夏季多雨，即青藏高原春季三维热力结构特征是导致长江中下游地区夏季降水偏多的重要原因之一．
The relationship was investigated between the torrential rain in the mid and lower reaches of the Changjiang River in summer 1998 and the thermal abnormality of the Tibetan Plateau in spring 1998.The statistics show that the 3 D thermal structure of 1998 with positive abnormality in the southern part and negative abnormality in the northern part is just like that of 1991 and 1993 which are flood years.Meanwhile,the sensitivity experiment also verified that the 3 D thermal.abnormality of the Tibetan Plateau in spring was the one of key consequences of the subsequent summer precipitation abnormality in 1998.
出处
《应用气象学报》
CSCD
北大核心
1999年第4期478-485,共8页
Journal of Applied Meteorological Science
基金
攀登项目
"我国重大气候和天气灾害的形成机理及预测理论研究"课题
关键词
青藏高原
热力结构
长江中下游
暴雨
地温异常
The Tibetan Plateau 3-D thermal structure The mid and lower reaches of the Changjiang River Torrential rain
