天氣速觀:寒流D-DAY3->D-DAY4,寒流今最強已過囉 - 颱風討論

By Odelette
at 2018-02-05T23:09
at 2018-02-05T23:09
Table of Contents
天氣速觀:寒流D-DAY3->D-DAY4,寒流今天最強,明起漸弱
隨著北太平洋阻塞高壓開始崩潰,北方西風系統的活動開始加速,
之後西風槽脊的變換不會再像這次拖這麼久了。
也就是之後冷氣團影響時間會縮短了。
不過崩潰時間有點長,大概要半週,一週後期,也帶出美西寒潮爆發。
這次的寒流這麼久,的確是受到北太平洋阻塞高壓的影響,
但北太平洋阻塞高壓,並不會讓東亞寒潮爆發,
東亞寒潮爆發的關鍵主要還是來自中亞脊/中亞阻塞高壓的出現,
只是
這次的太平洋阻塞高壓,意外地決定了東亞寒流的影響時間。
關鍵還是它阻礙西風系統的留動。
而隨著北太平洋阻塞高壓開始崩潰,
北方的東北亞高空冷渦旋也有了變化,模式預報,有一些往東分裂移出,
留在後頭還會帶出一波:一周後期的另一波冷氣團,
但西風系統的移動加速,
因此,後期的這波冷氣團影響時間縮短,強度也沒有這波這麼強。
目前D-DAY3->D-DAY4東亞寒潮爆發的巔峰,冷氣庫向南宣洩達到顛峰,寒流也達最強。
而晚起的台灣的大氣環境場轉為西北氣流,
分裂地面冷高壓1032百帕南下,乾冷空氣往台灣而來,
儘管西北氣流不如正北氣流加強寒流強度,但還是能維持D-DAY4到D-DAY5清晨的低溫。
因此,明起白天,中南部回溫會較明顯,但夜晚還是寒流。
北部則要等到後天了。
寒流快結束了,之後整個北半球有了大變化,從平流層高層出現增溫。
北極渦旋巔峰過後開始減弱,到底夏季系統何時甦醒,可以開始觀察了。
但也不用急於期待,這一等也可能等上半個月就是了。
(快速說說,以上供參考囉)
--
隨著北太平洋阻塞高壓開始崩潰,北方西風系統的活動開始加速,
之後西風槽脊的變換不會再像這次拖這麼久了。
也就是之後冷氣團影響時間會縮短了。
不過崩潰時間有點長,大概要半週,一週後期,也帶出美西寒潮爆發。
這次的寒流這麼久,的確是受到北太平洋阻塞高壓的影響,
但北太平洋阻塞高壓,並不會讓東亞寒潮爆發,
東亞寒潮爆發的關鍵主要還是來自中亞脊/中亞阻塞高壓的出現,
只是
這次的太平洋阻塞高壓,意外地決定了東亞寒流的影響時間。
關鍵還是它阻礙西風系統的留動。
而隨著北太平洋阻塞高壓開始崩潰,
北方的東北亞高空冷渦旋也有了變化,模式預報,有一些往東分裂移出,
留在後頭還會帶出一波:一周後期的另一波冷氣團,
但西風系統的移動加速,
因此,後期的這波冷氣團影響時間縮短,強度也沒有這波這麼強。
目前D-DAY3->D-DAY4東亞寒潮爆發的巔峰,冷氣庫向南宣洩達到顛峰,寒流也達最強。
而晚起的台灣的大氣環境場轉為西北氣流,
分裂地面冷高壓1032百帕南下,乾冷空氣往台灣而來,
儘管西北氣流不如正北氣流加強寒流強度,但還是能維持D-DAY4到D-DAY5清晨的低溫。
因此,明起白天,中南部回溫會較明顯,但夜晚還是寒流。
北部則要等到後天了。
寒流快結束了,之後整個北半球有了大變化,從平流層高層出現增溫。
北極渦旋巔峰過後開始減弱,到底夏季系統何時甦醒,可以開始觀察了。
但也不用急於期待,這一等也可能等上半個月就是了。
(快速說說,以上供參考囉)
--
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