马里泊萨号进入赤道无风带那天，马丁比任何时候都痛苦了。

The day the Mariposa entered the doldrums, Martin was more miserable than ever.

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预料森垃克将沿副高西北转北面向东北转东北偏东移动，当其进入西风带后移速将会逐渐加快。

It is expected that SINLAKU will move NE then ENE along the northwestern then northern periphery of the subtropical ridge. Acceleration is expected as it enters the westerlies.

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矢量散度、旋度特征和锋生锋消现象的联系，并和与此台风前期路径及强度相似、但进入西风带后很快消失了的8406号台风的诊断结果进行了对比。

The result was compared with another typhoon (8406) whose early path and intensity were similar to 8509 but not developed when it entered the westerly belt.

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