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專家:「環境駛流場」讓颱風更接近台灣 太平洋高壓增強

ETtoday
2026/07/03 | 2分鐘閱讀

記者柯沛辰/綜合報導

氣象專家林得恩表示,最新模擬顯示,太平洋高壓勢力增強西伸,將充當導引角色,使得即將成颱的熱帶低壓TD10更靠近台灣。

image

太平洋高壓增強西伸 TD10恐更接近台灣

林得恩在臉書「林老師氣象站」發文表示,根據今晨美國NCEP GFS數值模式模擬結果顯示,從500hPa重力位高度距平場預測圖來看,在7日至10日期間,擔任環境駛流場導引角色的太平洋高壓勢力不僅增強,而且正在西伸,將使TD10或由其所增強的颱風更接近台灣。

林得恩指出,儘管環境駛流場導引明確,但超過一周以上的預報,時間尚久,環境還在調整,不確定性大,尚無需過度緊張,氣象團隊將持續監測守視。

西太平洋海溫偏高 有利太平洋高壓增強

林得恩解釋,太平洋高壓勢力之所以增強,是因為西太平洋暖池的海溫偏高時,海洋會釋放更多熱量,水氣蒸發增加,大氣能量也會跟著增加。由於高海溫改變了熱帶對流分布,使得西太平洋大氣環流重新調整,所以當熱帶對流活動集中在特定區域時,就會透過大氣波動與環流調節,促使太平洋高壓增強,並有向西延伸的趨勢。

季風偏弱時 也提供高壓西伸有利機制

林得恩說,另一方面,由於夏季亞洲季風與太平洋高壓通常會互相作用,所以當印度季風較弱,或南海季風偏弱,或西南氣流減弱時,也提供了太平洋高壓西伸的有利機制。

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本文轉載自ETtoday,原文標題:專家:「環境駛流場」讓颱風更接近台灣 太平洋高壓增強

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