Dynamical Interactions Between Storm Track Eddies and the Stationary Wave Anomalies During ENSO

9314097 Ting中纬度地区大气的行为强烈地影响着热带太平洋的海面温度，特别是在被称为厄尔尼诺的海面异常变暖期间。本研究项目的目的是了解在这些时期有什么机制在起作用，这些机制在组织高频大气运动，特别是时间平均流的作用。本研究将采用由全环流模型推导而来的干燥原始方程模型。一个理想化的热带加热异常，代表厄尔尼诺事件期间的热带信号，将强加于时间平均气候学。将通过改变热带加热异常的位置和改变应用异常的时间平均基本状态来测试温带响应的敏感性。这些结果应该能让我们深入了解是什么决定了瞬态的组织。本研究可为改进厄尔尼诺天气预报提供依据。＊＊＊

9314097 Ting The behavior of the atmosphere in midlatitudes is strongly influenced the sea surface temperatures in the tropical Pacific, particularly during the periods of anomalous sea surface warming known as El Nino. The purpose of this research project to understand what mechanisms are at work during these periods which act to organize the higher frequency atmospheric motions, particularly the role of the time mean flow. A dry primitive equation model, derived from a full general circulation model, will be used for this study. An idealized tropical heating anomaly, representing the tropical signal during an El Nino event, will be imposed on the time mean climatology. Sensitivity of the extratropical response will be tested by varying the location of the tropical heating anomaly and by changing the time mean basic states to which the anomaly is applied. The results should provide insights into the what determines the organization of the transients. This research may provide a basis for improving weather forecasting during El Nino events. ***