One example of a sensitive region, says Wu Chun-chieh, is the boundary of a Pacific high pressure area, which comes closest to typhoons during the summer. The extent and strength of such sensitive areas, and the wind direction within them, will affect the wind field of a tropical cyclone, and can determine its future direction.
像夏季時離颱風最近的太平洋高壓邊緣，通常就是所謂的「敏感區域」，此處的範圍、強弱、風向會影響颱風風場，也可能左右颱風的未來走向。