天氣小觀:冷氣團結束,後期強勁北太平洋暖脊 - 颱風討論
By Lily
at 2021-12-28T19:59
at 2021-12-28T19:59
Table of Contents
天氣小觀:冷氣團結束,後期強勁北太平洋暖脊
從12月26日傍晚到12月27日持續的冷氣團,今天冷氣團結束;
模式預報未來一週,強烈的北太平洋暖脊出現,
由於暖脊出現在北太平洋,東亞大槽落於暖脊後方,不利西風槽轉直。
模式顯示,一週後期亞洲遠東的高空冷渦旋受強勁北太平洋暖脊推擠,
冷渦旋不斷往西調整至西伯利亞中部,與西西伯利亞的冷渦旋結合,
形成帶狀分布的冷渦旋,於是大氣中層西風帶變得較為平直。
對台灣來說,西風帶轉平直後,冷高壓東移速度快,
雖不易發展強度偏弱,但在隆冬時期,降溫不成問題。
在隆冬時期,北方全是寒冷空氣遍布,即使平直的西風帶下,
只要有一點波動,就能推積明顯的冷高壓,
只要有一點直槽,就能推動明顯的冷空氣;
因此,
未來一週,不斷有冷高壓南下東移,強度不強,但對北部來說也夠冷。
比較溫暖的就是南部了。
稍微有變化的就是下週似乎有南支槽趁機秀一波,
但整體來看,進入後冬時期(跨年後之冬)暫時還沒看到太大變化,
是否冬季系統在前冬太威猛,後冬要休息了嗎,再觀察囉。
(簡單說說供參囉)
--
從12月26日傍晚到12月27日持續的冷氣團,今天冷氣團結束;
模式預報未來一週,強烈的北太平洋暖脊出現,
由於暖脊出現在北太平洋,東亞大槽落於暖脊後方,不利西風槽轉直。
模式顯示,一週後期亞洲遠東的高空冷渦旋受強勁北太平洋暖脊推擠,
冷渦旋不斷往西調整至西伯利亞中部,與西西伯利亞的冷渦旋結合,
形成帶狀分布的冷渦旋,於是大氣中層西風帶變得較為平直。
對台灣來說,西風帶轉平直後,冷高壓東移速度快,
雖不易發展強度偏弱,但在隆冬時期,降溫不成問題。
在隆冬時期,北方全是寒冷空氣遍布,即使平直的西風帶下,
只要有一點波動,就能推積明顯的冷高壓,
只要有一點直槽,就能推動明顯的冷空氣;
因此,
未來一週,不斷有冷高壓南下東移,強度不強,但對北部來說也夠冷。
比較溫暖的就是南部了。
稍微有變化的就是下週似乎有南支槽趁機秀一波,
但整體來看,進入後冬時期(跨年後之冬)暫時還沒看到太大變化,
是否冬季系統在前冬太威猛,後冬要休息了嗎,再觀察囉。
(簡單說說供參囉)
--
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