天氣小觀:地面冷氣團控場,高空冷暖戰不停 - 颱風討論
By Sierra Rose
at 2019-03-07T20:19
at 2019-03-07T20:19
Table of Contents
天氣小觀:地面冷氣團控場,高空冷暖戰不停
今天各地都下雨,北部甚至下了24小時。
下雨很正常,
因為春有春雨、夏有夏雨,秋有秋雨,冬有冬雨;
不過各季節主打的降雨雖說獨特,但其實也分別銜接。
春:華南雲雨帶
梅雨---------(春季最強降雨:西南氣流梅雨鋒)
夏:梅雨
颱風雨-------(夏季最強降雨:西南氣流颱風雨)
秋:颱風雨-------(秋季最強降雨:東北季風颱風雨)
冷鋒雨
冬:冷鋒雨
華南雲雨帶---(冬季最強降雨:東北季風華南鋒)
冬春銜接的降雨最明顯就是華南雲雨帶,
主要從後冬(跨年後之冬)時期接到春季。
兩者雖同,但仍可細分差異;
春季的華南雲雨帶環境場,
北方地面高壓已過極聖期,東北季風不若冬季來的強勁,
反之南支槽偏活躍,高空南風轉強,容易帶出對流胞降雨。
於是從冬季集中在東北部豪大雨的環境場,
變成了春季平均在西半部或中部以北降水。
而,當地面東北季風帶來冷氣團,這時就彷彿回到冬季了。
但,高空場表現著春季暖空氣的奮戰不懈。
目前就是如此,一整天地面冷氣團壓進台灣北部,
晚起,北部溫度都往11~12度,甚至10度左右,
當然台北也接近強烈冷氣團。
然而,高空場西風南支槽持續把水汽帶進華南地區,
雲雨帶沿著副高北側西風氣流往台灣,
副高與西風槽對峙使氣流從台灣西南方到東北方輻散,
使雲雨帶不斷台灣海峽移入降雨。
而明起攻守易主,南支槽前的西南風大舉北上進入華南,
接下來周五至周六就是要留意對流胞是否響春雷了。
當然要先冷過今晚了。
最後看到北極海冰,
這也是冬季系統在這個冬季表現最亮眼的,
先前受北太平洋暖脊影響崩潰的白令海冰,
周末起終於開始受到北極冷凍氣團的關愛,
模式預報不囉嗦很快地來個零下10~20度的冷凍氣團。
因此下周末3月16日前可望回補一些。
若是順利回補,3月中以前,北極海冰面積有機會再往上增加的。
(對照3月中以後,平均海冰面積開始遞減)
對北極大氣調溫是很有幫助的,再觀察囉
(簡單說說,以上供參囉)
--
今天各地都下雨,北部甚至下了24小時。
下雨很正常,
因為春有春雨、夏有夏雨,秋有秋雨,冬有冬雨;
不過各季節主打的降雨雖說獨特,但其實也分別銜接。
春:華南雲雨帶
梅雨---------(春季最強降雨:西南氣流梅雨鋒)
夏:梅雨
颱風雨-------(夏季最強降雨:西南氣流颱風雨)
秋:颱風雨-------(秋季最強降雨:東北季風颱風雨)
冷鋒雨
冬:冷鋒雨
華南雲雨帶---(冬季最強降雨:東北季風華南鋒)
冬春銜接的降雨最明顯就是華南雲雨帶,
主要從後冬(跨年後之冬)時期接到春季。
兩者雖同,但仍可細分差異;
春季的華南雲雨帶環境場,
北方地面高壓已過極聖期,東北季風不若冬季來的強勁,
反之南支槽偏活躍,高空南風轉強,容易帶出對流胞降雨。
於是從冬季集中在東北部豪大雨的環境場,
變成了春季平均在西半部或中部以北降水。
而,當地面東北季風帶來冷氣團,這時就彷彿回到冬季了。
但,高空場表現著春季暖空氣的奮戰不懈。
目前就是如此,一整天地面冷氣團壓進台灣北部,
晚起,北部溫度都往11~12度,甚至10度左右,
當然台北也接近強烈冷氣團。
然而,高空場西風南支槽持續把水汽帶進華南地區,
雲雨帶沿著副高北側西風氣流往台灣,
副高與西風槽對峙使氣流從台灣西南方到東北方輻散,
使雲雨帶不斷台灣海峽移入降雨。
而明起攻守易主,南支槽前的西南風大舉北上進入華南,
接下來周五至周六就是要留意對流胞是否響春雷了。
當然要先冷過今晚了。
最後看到北極海冰,
這也是冬季系統在這個冬季表現最亮眼的,
先前受北太平洋暖脊影響崩潰的白令海冰,
周末起終於開始受到北極冷凍氣團的關愛,
模式預報不囉嗦很快地來個零下10~20度的冷凍氣團。
因此下周末3月16日前可望回補一些。
若是順利回補,3月中以前,北極海冰面積有機會再往上增加的。
(對照3月中以後,平均海冰面積開始遞減)
對北極大氣調溫是很有幫助的,再觀察囉
(簡單說說,以上供參囉)
--
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