深厚割離低壓悄悄過境~ - 颱風討論

By Tracy
at 2015-04-14T14:16
at 2015-04-14T14:16
Table of Contents
昨天到今天,一次相當經典的割離低壓冷渦南下過程,
這個冷渦在500百帕(5000公尺高度)中心附近的溫度大約是零下30~32度左右,
台灣雖然離中心有段距離,但是台灣高空的溫度也降到零下20~23度間,
http://ppt.cc/RemE
http://ppt.cc/KDyG
台灣最高的測站玉山站高度不到4000公尺,昨晚的溫度也降到零下10度左右,
幸好都是冷在高空,地面附近的溫度並沒有降得非常低。
今天清晨平地低溫出現在淡水、宜蘭、新竹及新屋等地,都不到13度,
而且輻射冷卻效應還蠻明顯的,低溫出現的時候相對濕度都有明顯上升,
白天太陽一出來溫度就快速回升了。
如果是寒冬中出現這樣的冷渦,恐怕會是非常強的寒流南下過程。
另一個好家在的地方是這一波非常乾,
雖然冷渦很強,但是帶給台灣的是非常乾燥的空氣,
今天白天很多地方濕度都降到40%上下,
天空雲量非常少而且透明度非常好,能見度很高,
http://ppt.cc/dRLL
假如是大量的潮濕空氣配合這樣的系統南下,恐怕會有劇烈且惡劣的天氣發生,
只能說這一次台灣相當幸運,遇上這種少見的系統,但是並沒有發生什麼事情。
--
這個冷渦在500百帕(5000公尺高度)中心附近的溫度大約是零下30~32度左右,
台灣雖然離中心有段距離,但是台灣高空的溫度也降到零下20~23度間,
http://ppt.cc/RemE
http://ppt.cc/KDyG
台灣最高的測站玉山站高度不到4000公尺,昨晚的溫度也降到零下10度左右,
幸好都是冷在高空,地面附近的溫度並沒有降得非常低。
今天清晨平地低溫出現在淡水、宜蘭、新竹及新屋等地,都不到13度,
而且輻射冷卻效應還蠻明顯的,低溫出現的時候相對濕度都有明顯上升,
白天太陽一出來溫度就快速回升了。
如果是寒冬中出現這樣的冷渦,恐怕會是非常強的寒流南下過程。
另一個好家在的地方是這一波非常乾,
雖然冷渦很強,但是帶給台灣的是非常乾燥的空氣,
今天白天很多地方濕度都降到40%上下,
天空雲量非常少而且透明度非常好,能見度很高,
http://ppt.cc/dRLL
假如是大量的潮濕空氣配合這樣的系統南下,恐怕會有劇烈且惡劣的天氣發生,
只能說這一次台灣相當幸運,遇上這種少見的系統,但是並沒有發生什麼事情。
--
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