天氣小觀:冷高一波波通過東亞,後期北亞超級冷渦 - 颱風討論
By Edwina
at 2018-12-14T10:00
at 2018-12-14T10:00
Table of Contents
天氣小觀:地面冷高壓一波波通過東亞,留意後期北亞超級冷渦
這兩天第3波強冷空氣過後,冷高壓走廊模式開啟,
模式預報未來一週冷高壓一波波通過東亞,
要留意的是周日的冷高壓衝得比較南邊,帶來乾冷空氣,
輻射冷卻的低溫就會出現。
不過整體來看已不若上週冷高壓強度往上,
下週起冷高壓強度往下走,想當然東北季風強度往下走,冷空氣強度往下走。
原因當然西風大環境沒有辦法帶出西風大槽。
最新模式預報又修正了後期走回正北極震盪,
儘管北方西伯利亞超級寒凍,
尤其後期北極渦旋偏向北亞增強,西伯利亞高空出現超級冷渦旋,
中心區850帕已可達零下45度的低溫,再來就是挑戰零下50度了。
在逆溫輻射冷卻下,地面溫度可能出現零下40~50度的低溫。
如此可怕恐怖的嚴寒,隨著北極渦旋勢力增強,
冷凍氣團被鎖在北方極地,無法南下。
不過可惜的是,
北大西洋的海冰沒辦法明顯受惠於西伯利亞的超級冷渦旋,
反倒是阿拉斯加白令海的海冰較有機會。
對東亞來說,
歐洲的阻塞高壓帶不出中亞大脊,
但帶出中亞的西風帶波動,有利後面的西風槽脊加強,
連帶影響南亞副高北側的副熱帶西風噴流,
隨著亞非西風帶波動加劇,長期模式也預報了正北極震盪也將不穩定。
因此,長期模式預報不認為北亞的超冷凍氣團會回流北極。
下游的東亞當然就要持續觀察了。
上週的超級冷凍氣團東移,冷凍了韃靼海峽以及鄂霍次克海部份西北岸,
甚至渤海也有一些海冰,這次的超級冷凍氣團如果不回流北極,
又會流向何方呢?
(簡單說說,以上供參囉)
--
這兩天第3波強冷空氣過後,冷高壓走廊模式開啟,
模式預報未來一週冷高壓一波波通過東亞,
要留意的是周日的冷高壓衝得比較南邊,帶來乾冷空氣,
輻射冷卻的低溫就會出現。
不過整體來看已不若上週冷高壓強度往上,
下週起冷高壓強度往下走,想當然東北季風強度往下走,冷空氣強度往下走。
原因當然西風大環境沒有辦法帶出西風大槽。
最新模式預報又修正了後期走回正北極震盪,
儘管北方西伯利亞超級寒凍,
尤其後期北極渦旋偏向北亞增強,西伯利亞高空出現超級冷渦旋,
中心區850帕已可達零下45度的低溫,再來就是挑戰零下50度了。
在逆溫輻射冷卻下,地面溫度可能出現零下40~50度的低溫。
如此可怕恐怖的嚴寒,隨著北極渦旋勢力增強,
冷凍氣團被鎖在北方極地,無法南下。
不過可惜的是,
北大西洋的海冰沒辦法明顯受惠於西伯利亞的超級冷渦旋,
反倒是阿拉斯加白令海的海冰較有機會。
對東亞來說,
歐洲的阻塞高壓帶不出中亞大脊,
但帶出中亞的西風帶波動,有利後面的西風槽脊加強,
連帶影響南亞副高北側的副熱帶西風噴流,
隨著亞非西風帶波動加劇,長期模式也預報了正北極震盪也將不穩定。
因此,長期模式預報不認為北亞的超冷凍氣團會回流北極。
下游的東亞當然就要持續觀察了。
上週的超級冷凍氣團東移,冷凍了韃靼海峽以及鄂霍次克海部份西北岸,
甚至渤海也有一些海冰,這次的超級冷凍氣團如果不回流北極,
又會流向何方呢?
(簡單說說,以上供參囉)
--
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