天氣速觀:東海旋生,降雨減少 - 颱風討論
By Ivy
at 2021-02-26T08:28
at 2021-02-26T08:28
Table of Contents
天氣速觀:東海旋生,降雨減少
最新模式,昨起東海有氣旋出現,預報逐漸發展出溫帶氣旋,
這表示地面冷空氣可以迅速南下,明起的鋒面降雨預報又調回減少許多。
從噴流來看,
大氣低層噴流完全由東移的氣旋掌控,
在氣旋北側與地面冷高壓輻合(共伴)較為強勁,南側沒有顯著的急流;
而高層的副熱帶噴流明起又略為北移,
因此南下台灣的鋒面帶上就更不可能會有劇烈降雨了。
看來夏季系統甦醒的首波攻擊完全被冬季系統輾壓,
台灣降雨要期待3月的春雨鋒面。
下週二的另一波鋒面南下,
不過,
這一波鋒面完全是冬季冷鋒特性:大氣低層東北季風降雨,大氣中層西風噴流輻散。
因此,
冷鋒南下,主要是北部和東北部降雨,
接著,東北季風地形雨的重雨區偏向東北部,東部也有一些降雨。
再來10天以後,模式終於有顯示南支槽東移了,
只是時間太久,後期再觀察看看了。
(快速說說囉)
--
最新模式,昨起東海有氣旋出現,預報逐漸發展出溫帶氣旋,
這表示地面冷空氣可以迅速南下,明起的鋒面降雨預報又調回減少許多。
從噴流來看,
大氣低層噴流完全由東移的氣旋掌控,
在氣旋北側與地面冷高壓輻合(共伴)較為強勁,南側沒有顯著的急流;
而高層的副熱帶噴流明起又略為北移,
因此南下台灣的鋒面帶上就更不可能會有劇烈降雨了。
看來夏季系統甦醒的首波攻擊完全被冬季系統輾壓,
台灣降雨要期待3月的春雨鋒面。
下週二的另一波鋒面南下,
不過,
這一波鋒面完全是冬季冷鋒特性:大氣低層東北季風降雨,大氣中層西風噴流輻散。
因此,
冷鋒南下,主要是北部和東北部降雨,
接著,東北季風地形雨的重雨區偏向東北部,東部也有一些降雨。
再來10天以後,模式終於有顯示南支槽東移了,
只是時間太久,後期再觀察看看了。
(快速說說囉)
--
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