天氣小觀:未來一週季風環流壟罩1~2個季風低壓 - 颱風討論
By Isla
at 2021-08-01T08:22
at 2021-08-01T08:22
Table of Contents
天氣小觀:未來一週大季風低壓環流壟罩,台灣旁邊形成1~2個封閉的低壓氣旋
模式預報,未來一週華南-台灣受大季風低壓環流壟罩,
這種情況所受的西南氣流比起東亞華南-華中為大季風低壓環流的情況小些,
在大季風低壓環流中,難免就會形成封閉的低氣壓,
尤其在盛夏熱海上,熱帶擾動發展起來機會就很高,
如此一來,西南氣流的分布就有所改變。
GFS認為,
季風環流形成2個低氣壓分別在台灣兩側,一東一西形成,
如此一來,西南氣流會呈水平狀主要落於南海北部到呂宋島,
台灣受西南氣流影響也就減輕許多。
東邊太平洋的低壓擾動還留有發展的跡象,看來有機會成颱。
西邊華南沿岸的低壓擾動位於華南沿岸,受陸地影響發展較慢。
EC認為,
季風環流初期的2個低氣壓位於台灣左方/上方,一西一北形成,
如此一來,西南氣流成東北-西南向,
中南部受西南氣流正沖,北部也可能受東海的低壓影響,
東海的低氣壓與華南沿岸的兩低氣壓很快藤原效應互旋,
東海低氣壓偏弱撞進陸地後被華南沿岸的低壓合併,
之後華南沿岸的低壓稍微發展起來。
然而,
不管是兩個低氣壓還是一個合併低氣壓,模式顯示一週後騎,
東北亞有大西風槽一把抓,因此屆時低壓擾動/颱風都被往北帶,
這段過程,西南氣流也跟著東北-西南向往西風槽前吹,
因此下週末中南部受西南氣流的影響偏大。
整體來看,
中南部降雨緩和的應該是下週末以前(除了今明兩天季風環流封閉低壓形成降雨較強)。
至於一週尾聲過後,大氣形勢情況會有點不單純了,
東亞的第一波冷鋒出現了,象徵大氣環境改變的起頭,難怪8月7日立秋。
(以上供參囉)
--
模式預報,未來一週華南-台灣受大季風低壓環流壟罩,
這種情況所受的西南氣流比起東亞華南-華中為大季風低壓環流的情況小些,
在大季風低壓環流中,難免就會形成封閉的低氣壓,
尤其在盛夏熱海上,熱帶擾動發展起來機會就很高,
如此一來,西南氣流的分布就有所改變。
GFS認為,
季風環流形成2個低氣壓分別在台灣兩側,一東一西形成,
如此一來,西南氣流會呈水平狀主要落於南海北部到呂宋島,
台灣受西南氣流影響也就減輕許多。
東邊太平洋的低壓擾動還留有發展的跡象,看來有機會成颱。
西邊華南沿岸的低壓擾動位於華南沿岸,受陸地影響發展較慢。
EC認為,
季風環流初期的2個低氣壓位於台灣左方/上方,一西一北形成,
如此一來,西南氣流成東北-西南向,
中南部受西南氣流正沖,北部也可能受東海的低壓影響,
東海的低氣壓與華南沿岸的兩低氣壓很快藤原效應互旋,
東海低氣壓偏弱撞進陸地後被華南沿岸的低壓合併,
之後華南沿岸的低壓稍微發展起來。
然而,
不管是兩個低氣壓還是一個合併低氣壓,模式顯示一週後騎,
東北亞有大西風槽一把抓,因此屆時低壓擾動/颱風都被往北帶,
這段過程,西南氣流也跟著東北-西南向往西風槽前吹,
因此下週末中南部受西南氣流的影響偏大。
整體來看,
中南部降雨緩和的應該是下週末以前(除了今明兩天季風環流封閉低壓形成降雨較強)。
至於一週尾聲過後,大氣形勢情況會有點不單純了,
東亞的第一波冷鋒出現了,象徵大氣環境改變的起頭,難怪8月7日立秋。
(以上供參囉)
--
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