天氣小觀:太平洋高壓默默吃三碗公 - 颱風討論
By Steve
at 2015-06-02T21:02
at 2015-06-02T21:02
Table of Contents
天氣小觀:太平洋高壓默默吃三碗公
(以下白話/擬人話說明)
受到太平洋高壓影響,南海的西南季風進入了間歇期,強度減弱,
就這句話才發現,
忽略了原先一直沒特別注意到的太平洋高壓,其實一直默默吃三碗公,
和北方的西風槽比,太平洋高壓並沒有刻意拿下東亞地區。
但是,卻反忘了西太平洋到南海這一塊!
其實太平洋高壓一直在西太平洋和南海蓄積實力,沉潛後的實力令人難以置信,
此刻的太平洋高壓從西太平洋到南海,甚至到中南半島高空,都有它的勢力在,
而且漸漸發揮影響力。
在西太平洋上,擾動不斷被太平洋高壓抑制,偶爾零星的對流根本不成氣候。
模式預報看來,高壓統治下的西太平洋安靜平和,擾動一一被消散。
在南海地區,西南季風減弱,進入間歇期,甚至部分地區出現高壓的東風勢力。
就好像冬季大陸冷高壓抑制西風南支槽發展,帶來乾冷,
夏季當太平洋抑制南海西南季風強度,帶來乾熱。(南海西南季風的間歇或中斷)
除非之後有較強的中緯度系統影響,逼退高壓勢力,才能再助長西南季風北上。
在中南半島,陸地的熱低壓減弱,地面氣壓升高,
使孟加拉灣的西南季風要吹入中南半島變得很辛苦,
模式甚至預報,未來一周還出現反氣旋勢力阻止西南季風。
而台灣大致位於中緯度系統與太平洋高壓的角力禮讓區。
梅雨鋒面看似還在南北擺動,但顯然溫和多了。
太平洋高壓非常穩重,不急著搶攤東亞,
看的出來中緯度系統由於冬季系統持續衰退,
因此,東亞地區撐不了多久勢必得讓出來,時間和空間都是站在它這一邊。
台灣位於東亞南方,即便有時北方系統讓梅雨鋒面南移,
但只要從中角力,不用硬碰,自然又可以慢慢將勢力深入,
要不了多久,梅雨鋒面就會北抬。
就這樣,太平洋高壓不硬碰,穩重的拓展勢力,又從中發揮影響力,
漸漸地崛起後,大家才發現原來夏天這麼近。
果不其然,大氣高層的南亞高壓一周後期
勢力也各往東西拓展,將西風噴流穩穩頂在北面,
西風帶的波動被南亞高壓壓制,
北方勢力更難往南影響,暖空氣勢力北上,
因此,模式預報,未來一周在南亞高壓尚未橫向拓展之前,
梅雨鋒面南移的影響台灣的降雨就有機會。
有可能是北部為主,也有可能是全台。
不過太平洋高壓抑制南海的西南季風,降雨還是有限的。
一周後期,南亞高壓逐漸伸展,東入太平洋,西抵印度半島,
看來夏季北半球高空最強大的高壓系統,要逐漸展現肌肉了。
(以上供參囉)
--
(以下白話/擬人話說明)
受到太平洋高壓影響,南海的西南季風進入了間歇期,強度減弱,
就這句話才發現,
忽略了原先一直沒特別注意到的太平洋高壓,其實一直默默吃三碗公,
和北方的西風槽比,太平洋高壓並沒有刻意拿下東亞地區。
但是,卻反忘了西太平洋到南海這一塊!
其實太平洋高壓一直在西太平洋和南海蓄積實力,沉潛後的實力令人難以置信,
此刻的太平洋高壓從西太平洋到南海,甚至到中南半島高空,都有它的勢力在,
而且漸漸發揮影響力。
在西太平洋上,擾動不斷被太平洋高壓抑制,偶爾零星的對流根本不成氣候。
模式預報看來,高壓統治下的西太平洋安靜平和,擾動一一被消散。
在南海地區,西南季風減弱,進入間歇期,甚至部分地區出現高壓的東風勢力。
就好像冬季大陸冷高壓抑制西風南支槽發展,帶來乾冷,
夏季當太平洋抑制南海西南季風強度,帶來乾熱。(南海西南季風的間歇或中斷)
除非之後有較強的中緯度系統影響,逼退高壓勢力,才能再助長西南季風北上。
在中南半島,陸地的熱低壓減弱,地面氣壓升高,
使孟加拉灣的西南季風要吹入中南半島變得很辛苦,
模式甚至預報,未來一周還出現反氣旋勢力阻止西南季風。
而台灣大致位於中緯度系統與太平洋高壓的角力禮讓區。
梅雨鋒面看似還在南北擺動,但顯然溫和多了。
太平洋高壓非常穩重,不急著搶攤東亞,
看的出來中緯度系統由於冬季系統持續衰退,
因此,東亞地區撐不了多久勢必得讓出來,時間和空間都是站在它這一邊。
台灣位於東亞南方,即便有時北方系統讓梅雨鋒面南移,
但只要從中角力,不用硬碰,自然又可以慢慢將勢力深入,
要不了多久,梅雨鋒面就會北抬。
就這樣,太平洋高壓不硬碰,穩重的拓展勢力,又從中發揮影響力,
漸漸地崛起後,大家才發現原來夏天這麼近。
果不其然,大氣高層的南亞高壓一周後期
勢力也各往東西拓展,將西風噴流穩穩頂在北面,
西風帶的波動被南亞高壓壓制,
北方勢力更難往南影響,暖空氣勢力北上,
因此,模式預報,未來一周在南亞高壓尚未橫向拓展之前,
梅雨鋒面南移的影響台灣的降雨就有機會。
有可能是北部為主,也有可能是全台。
不過太平洋高壓抑制南海的西南季風,降雨還是有限的。
一周後期,南亞高壓逐漸伸展,東入太平洋,西抵印度半島,
看來夏季北半球高空最強大的高壓系統,要逐漸展現肌肉了。
(以上供參囉)
--
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