upper-level circulation

基本解释

The evolution and enhancement of occluded frontal circulation in upper-level westerly jet and lower-level southerly jet are discussed by using a dry primitive equation model.
利用原始方程模式探讨了高空西风急流和低空南风急流中锢囚锋环流的演变和增强机制。
Through the analysis, it is shown that the Matsa s extratropical transition and the re-intensification are due to the intrusion of cold air from the upper-level trough into the typhoons circulation.
以一个在陆上长久维持并最终演变成温带气旋的登陆台风“麦莎”为研究对象，通过对其北上变性过程的分析发现，台风与中高纬西风槽的相互作用使得冷空气侵入是其变性加强的原因。