天氣小觀:模式再改,雙心北極渦旋回北極整併 - 颱風討論
By Victoria
at 2021-12-08T20:55
at 2021-12-08T20:55
Table of Contents
今年的前冬時期(跨年前之冬),北極渦旋應該可用一個字形容:穩
不太強,不太弱,還很愛北極,
難怪,北極海冰除了北美哈德遜灣外,其他都不太需要擔心。
而,
原本認為北極渦旋會往外興安嶺滑落的模式,
最新模式重新修正,
未來一週,北極渦旋將返回北極,中心百帕高度場依舊維持15100米~15000米以下;
可說是強烈,或非常強烈的渦旋;
但說強,又未達14900米以下的異常超強渦旋,
說弱,也並非是15500米以上的弱極渦。
結論:
北極渦旋就是一個穩定的渦旋。
北極渦旋穩定,阻塞高壓變得很少,西風帶順暢。
當然,
少了阻塞高壓,1065百帕以上的超強地面冷高壓就很少見了。
因此,
東亞的寒潮爆發就要看東亞大槽的活躍程度了。
目前看來,比起12月第一週,
東亞大槽進入較不活躍期,未來一週比較強的冷空氣是下週一,
反而,
南方副高場稍微活躍,尤其下週三以後,
但其中原因是副高南側有擾動發展為颱風的跡象。
但冬季副高偏南,擾動位於低緯度,就算形成颱風也往西移進入南海。
儘管如此,越往冬至接近,北方大雪紛飛,南方夜晚也越冷了。
12月是台灣的冷氣團季、1~2月是寒流季、3月上旬也是冷氣團季。
因此,
就算北極渦旋回北極,但更有利發展也是後續要觀察了。
(以上供參囉)
--
不太強,不太弱,還很愛北極,
難怪,北極海冰除了北美哈德遜灣外,其他都不太需要擔心。
而,
原本認為北極渦旋會往外興安嶺滑落的模式,
最新模式重新修正,
未來一週,北極渦旋將返回北極,中心百帕高度場依舊維持15100米~15000米以下;
可說是強烈,或非常強烈的渦旋;
但說強,又未達14900米以下的異常超強渦旋,
說弱,也並非是15500米以上的弱極渦。
結論:
北極渦旋就是一個穩定的渦旋。
北極渦旋穩定,阻塞高壓變得很少,西風帶順暢。
當然,
少了阻塞高壓,1065百帕以上的超強地面冷高壓就很少見了。
因此,
東亞的寒潮爆發就要看東亞大槽的活躍程度了。
目前看來,比起12月第一週,
東亞大槽進入較不活躍期,未來一週比較強的冷空氣是下週一,
反而,
南方副高場稍微活躍,尤其下週三以後,
但其中原因是副高南側有擾動發展為颱風的跡象。
但冬季副高偏南,擾動位於低緯度,就算形成颱風也往西移進入南海。
儘管如此,越往冬至接近,北方大雪紛飛,南方夜晚也越冷了。
12月是台灣的冷氣團季、1~2月是寒流季、3月上旬也是冷氣團季。
因此,
就算北極渦旋回北極,但更有利發展也是後續要觀察了。
(以上供參囉)
--
Tags:
颱風
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