风暴完全并入西风槽后，变性后的温带气旋再次加强与平流层高位涡的向下输送有关。
After storm's entering westerly trough, the subtropical cyclone's reintensification was related to the high potential vortex's downward transmission from stratosphere.
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。
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.
试验结果表明，西风带的分布与南北半球行星尺度锋区及赤道高温带的季节性经向位移相关。
Results show that the background flow field of summer and winter monsoons and the cross-equatorial current are significantly correlated with the climatic position of the frontal zone;
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