中文摘要：

最近的出版物调查了在热带气旋(TC ) 和 midlatitude 发行量的热带以外的转变(et ) 之间的相互作用；然而， et 事件的研究很少考虑了在暴风雨和附近副热带的高度之间的关系。日本气象学机构的地区性的专业化气象学的中心东京台风中心提供的 TC 最好轨道的数据与 NCEP/NCAR 分析数据一起被使用在西方的诺思太平洋盆上在 et 上讨论副热带的高度的潜在的效果。当西方的和平的副热带的高度(WPSH ) 向东方被削弱并且撤退时，更多的 TC 列在后面反弯路径和 midlatitude 马槽活动被加强。这些变化导致提高的 et 活动。由对比，当 WPSH 向西加强并且延长时，向西直接列在后面的 TC 的数字路径增加和 midlatitude 马槽是相对不活跃的。这些条件导致 et 案例的减少的出现。WPSH 的反常活动应该在决定 et 活动被看作一个重要因素。

英文摘要：

Recent publications have investigated the interactions between the extratropical transitions （ETs） of tropical cyclones （TCs） and midlatitude circulations; however, studies of ET events have rarely considered the relationship between the storm and the nearby subtropical high. The TC best-track data provided by the Regional Specialized Meteorological Center-Tokyo Typhoon Center of the Japan Meteorology Agency are used in conjunction with the NCEP/NCAR reanalysis data to discuss the potential effects of the subtropical high on ETs over the western North Pacific basin. When the western Pacific subtropical high （WPSH） is weakened and withdrawn toward the east, more TCs follow recurving paths and the midlatitude trough activity is intensified. These changes lead to enhanced ET activity. By contrast, when the WPSH strengthens and extends westward, the number of TCs that follow direct westward paths increases and the midlatitude trough is relatively inactive. These conditions lead to reduced occurrences of ET cases. Abnormal activity of the WPSH should be considered as an important factor in determining ET activity.