摘要
该文利用一个简单的海－气耦合模式，从理论和数值试验方面研究了１９９１～１９９５年３次ＥｌＮｉｎｏ事件期间热带海洋中的热力和动力过程．利用１９９０年７月～１９９５年３月异常风应力强迫一个海洋模式，所得模拟结果和观测结果基本一致，可以清楚地看到３次暖过程．模拟结果的诊断分析表明，上述海表面温度明显而较快的变化主要是由水平平流作用、总上翻对距平温度垂直梯度的作用和热力阻尼决定的．西风异常在ＥｌＮｉｎｏ的发生、发展和衰亡过程中具有重要作用．
A simple coupled ocean atmosphere model was used to examine the dynamic and thermodynmic process of tropical ocean associated with the three El Nio events. In order to simulate and analyze the El Nio events of 1991～1995, the anomalous wind stress was used to force the ocean model. The modeling results were consistent well with observations. Diagnoses analyses on model results indicate that the SST anomaly is primarily determined by horizontal advection, upwelling on the anomalous vertical temperature gradient and thermal damping. The anomalous westerly plays an important role in the process of generation, developing and decaying of El Nio events.
出处
《应用气象学报》
CSCD
北大核心
1997年第A00期191-200,共10页
Journal of Applied Meteorological Science
基金
国家科委"九五"重中之重项目96-908-02-05
关键词
西风暴发
数值模拟
厄尔尼诺事件
El Nio events Burst of westerly Numerical simulation
