天氣小觀:西風南支槽東移 - 颱風討論

By Linda
at 2015-04-18T10:33
at 2015-04-18T10:33
Table of Contents
(以下白話說明)
北方冷氣團退縮到北方大陸,冷高壓無力,
冷空氣開始進入群雄割據,等著梅雨季夏季風爆發來踢館。
不過由於高空西風帶還未北移,
太平洋高壓被之前的高空冷渦旋打傷,
雖然之前的高空冷渦旋比預期再偏北一點通過,勢力擦過台灣北部,
但也讓台灣感受到降溫,也讓太平洋高壓元氣大傷待復原中。
沒有冷高壓抑制,沒有太平洋高壓西伸,
這時,西風南支槽又開始蠢蠢欲動。
模式預報,未來一周會有一波西風南支槽東移,
伴隨華南雲雨帶通過台灣。
不過明天起台灣天氣陸續都會有變化。
模式預報看起來是這樣的:
因為目前江南地區高空不斷有短波槽先行東移,
伴隨地面鋒面產生,
在地面層,偏南風加強,暖濕空氣被往北帶上來,
在700帕大氣中低層有噴流從華南往東擴及,
有利地面暖空氣被抬升成雲降雨,
因此預報南部和東部,首先不穩定。
之後,在500帕大氣中層則有太平洋高壓向北推擠,
因此,從西半部往北部和東北部也開始不穩定。
之後西風南支槽主槽東移,太平洋高壓向南退,
雲雨帶再往台灣南部壓。
一周後半期,北方西風槽通過,
槽後的地面高壓與東北風南下,雖然不如蒙古冷高壓與東北季風,
但也帶來一點乾空氣,推走水氣,台灣天氣再次恢復穩定。
簡單說,模式預報未來一周天氣晴雨變化。
(以上供參囉)
--
北方冷氣團退縮到北方大陸,冷高壓無力,
冷空氣開始進入群雄割據,等著梅雨季夏季風爆發來踢館。
不過由於高空西風帶還未北移,
太平洋高壓被之前的高空冷渦旋打傷,
雖然之前的高空冷渦旋比預期再偏北一點通過,勢力擦過台灣北部,
但也讓台灣感受到降溫,也讓太平洋高壓元氣大傷待復原中。
沒有冷高壓抑制,沒有太平洋高壓西伸,
這時,西風南支槽又開始蠢蠢欲動。
模式預報,未來一周會有一波西風南支槽東移,
伴隨華南雲雨帶通過台灣。
不過明天起台灣天氣陸續都會有變化。
模式預報看起來是這樣的:
因為目前江南地區高空不斷有短波槽先行東移,
伴隨地面鋒面產生,
在地面層,偏南風加強,暖濕空氣被往北帶上來,
在700帕大氣中低層有噴流從華南往東擴及,
有利地面暖空氣被抬升成雲降雨,
因此預報南部和東部,首先不穩定。
之後,在500帕大氣中層則有太平洋高壓向北推擠,
因此,從西半部往北部和東北部也開始不穩定。
之後西風南支槽主槽東移,太平洋高壓向南退,
雲雨帶再往台灣南部壓。
一周後半期,北方西風槽通過,
槽後的地面高壓與東北風南下,雖然不如蒙古冷高壓與東北季風,
但也帶來一點乾空氣,推走水氣,台灣天氣再次恢復穩定。
簡單說,模式預報未來一周天氣晴雨變化。
(以上供參囉)
--
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