天氣小觀:本週乾漸暖;下週冷高向上強,濕漸冷 - 颱風討論
By Olga
at 2018-12-18T11:28
at 2018-12-18T11:28
Table of Contents
天氣小觀:本週冷高向下弱,乾漸暖;下週冷高向上強,濕漸冷
輻射冷卻的意外低溫,昨晚至今北部/東北部各地出現意外的低溫,
12/18
凌晨2點33分,台北氣象站12.3度
清晨6點10分,蘇澳氣象站12.1度
清晨6點19分,宜蘭氣象站11.8度
清晨5點05分,淡水氣象站10.0度
而,中南部地區台中、嘉義最低溫也在12~13度,可見輻射冷卻威力。
今起地面高壓已出海,後面的地面高壓更弱,
因此東北季風減弱,溫度漸暖。
周日以後是下一波較明顯的冷高壓,冷鋒南下轉濕冷。
而重點就在下周以後,尤其下週二以後。
因為最新長期模式看來,
本週北方通過東亞的地面高壓一波波漸弱,且乾漸暖。
下周北方通過東亞的地面高壓一波波漸強,且濕漸冷。
原因就在於,
北極渦旋本週維持超級渦旋強度,還能鎖住西伯利亞的極地冷氣團不放肆,
1. 重點的下週,以最新預報看好東亞大槽的強勢,
下週起,長期模式看好東亞大槽的強勢,冬季系統開始發動侵襲,
甚至不排除連中亞都出現大脊,可想見東亞大槽的強勢。
一般中亞大脊->東亞大槽,
若是東亞大槽->中亞大脊,表示了東亞大槽的強勢展開。
因此,下週要做好準備了迎接進擊的冷氣團了。
下週東亞寒潮爆發,目前來看台灣也是冷氣團~寒流之間的影響。
2. 另外一種可能,也不排除的就是正北極震盪
儘管A0指數趨向負值,但也有不少轉正的模擬結果,
若下週轉正北極震盪,西伯利亞的極地冷氣團被大挖流回北極,
即便東亞大槽轉強,極地冷氣團勢力是否有能力逼退副高是很大問題,
如此,屆時的冷暖大戰造成南北溫差拉大。
以上 歐洲模式傾向1. 美軍模式傾向2
但無論如何,下週就是重點了。
本週的乾溫暖又是曬衣服晾棉被的好時機了。
(以上供參囉)
--
輻射冷卻的意外低溫,昨晚至今北部/東北部各地出現意外的低溫,
12/18
凌晨2點33分,台北氣象站12.3度
清晨6點10分,蘇澳氣象站12.1度
清晨6點19分,宜蘭氣象站11.8度
清晨5點05分,淡水氣象站10.0度
而,中南部地區台中、嘉義最低溫也在12~13度,可見輻射冷卻威力。
今起地面高壓已出海,後面的地面高壓更弱,
因此東北季風減弱,溫度漸暖。
周日以後是下一波較明顯的冷高壓,冷鋒南下轉濕冷。
而重點就在下周以後,尤其下週二以後。
因為最新長期模式看來,
本週北方通過東亞的地面高壓一波波漸弱,且乾漸暖。
下周北方通過東亞的地面高壓一波波漸強,且濕漸冷。
原因就在於,
北極渦旋本週維持超級渦旋強度,還能鎖住西伯利亞的極地冷氣團不放肆,
1. 重點的下週,以最新預報看好東亞大槽的強勢,
下週起,長期模式看好東亞大槽的強勢,冬季系統開始發動侵襲,
甚至不排除連中亞都出現大脊,可想見東亞大槽的強勢。
一般中亞大脊->東亞大槽,
若是東亞大槽->中亞大脊,表示了東亞大槽的強勢展開。
因此,下週要做好準備了迎接進擊的冷氣團了。
下週東亞寒潮爆發,目前來看台灣也是冷氣團~寒流之間的影響。
2. 另外一種可能,也不排除的就是正北極震盪
儘管A0指數趨向負值,但也有不少轉正的模擬結果,
若下週轉正北極震盪,西伯利亞的極地冷氣團被大挖流回北極,
即便東亞大槽轉強,極地冷氣團勢力是否有能力逼退副高是很大問題,
如此,屆時的冷暖大戰造成南北溫差拉大。
以上 歐洲模式傾向1. 美軍模式傾向2
但無論如何,下週就是重點了。
本週的乾溫暖又是曬衣服晾棉被的好時機了。
(以上供參囉)
--
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