2005年，第9号台风“麦莎”和第15号台风“卡努”先后影响上海。

In 2005, No. 9 Typhoon "Maisha" and No. 15 Typhoon "Kanu" affected Shanghai one by one.

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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.

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