天氣小觀:模式大改,北大西洋暖脊切北極雙心 - 颱風討論
By Steve
at 2022-11-26T09:09
at 2022-11-26T09:09
Table of Contents
模式大改,北大西洋暖脊再切北極,
一切又變,北極渦旋未來一週再分雙心,增強速度變緩,
中心百帕高度場15100米以下的強烈北極渦旋,沒有異常增強情況,
此外,
北大西洋暖脊也影響了中亞脊,中亞少了深厚暖脊,
地面冷高壓也不會堆積到1065百帕以上的超級冷高壓,
反而中亞脊不夠強,但又有出現的情況下,
冷高壓面臨要在新疆還是蒙古發展的猶疑。
目前模式顯示,周二最終分裂高壓在蒙古南下,東亞寒潮爆發,
但相對原先模式比起來調弱許多。
對台灣來說,海洋的調節讓週二的冷高壓為東北季風冷空氣增強。
前幾天,由於北方冷高壓不強,沒有辦法有效抑制西風南支槽,
西風帶南移後,
西風氣流經過青藏高原分流效應的西風南支槽與南方副高對峙,
於是槽前/副高西北側的容易出現急流,
如果南方暖空氣對流較強,甚至有雷聲,有如春雨。
但,
前冬時期(跨年前之冬)冬季畢竟才前段,北極永夜持續擴大,
極地冷高壓勢力持續壯大,南支槽的活躍都不是真正活躍,
真正活躍的東亞大槽依舊占盡風頭,南支槽配合活動。
甚至,
連技不如"東亞大槽"的副高都要配合東亞大槽。
再看北極,真正厲害的是北大西洋暖脊,西風帶的大波動,
已經深入北極,導致北極雙心分成亞洲遠東和北美,
北極超冷凍氣團衝向哈德遜灣,另一股衝向台灣熟悉的"鄂霍次克海"
因此,
這個新冬季鄂霍次克海冰可期,反觀,巴倫支海冰狀況就不妙了。
環繞在北極中心的海區,
0.
中心:北極海/北冰洋 :目前海冰約達平均值的90%
1.
北極鄰海:1. 格陵蘭海 :目前海冰約達平均值的95%
2. 巴倫支海 :目前海冰約達平均值的40% >.<
3. 卡拉海 :目前海冰約達平均值的60%
4. 拉普提夫海 :目前海冰約達平均值的100%
5. 東西伯利亞海 :目前海冰約達平均值的100%
6. 楚科奇海 :目前海冰約達平均值的50% >.<
7. 波弗特海 :目前海冰約達平均值的100%
8. 加拿大北極群島間海域 :目前海冰約達平均值的100%
9. 巴芬灣 :目前海冰約達平均值的105% ^.^
2.
鄰北極圈海域:1. 哈德孫灣 :目前海冰約達平均值的50% >.<
2. 大衛斯海峽 :目前海冰約達平均值的100%
3. 丹麥海峽 :目前海冰約達平均值的50%
4. 挪威海 :(略,不凍海)
5. 白令海峽 :目前海冰約達平均值的50% >.<
3.
副極地海域:1. 白令海 :目前海冰約達平均值的60%
2. 鄂霍次克海 :(略,往年這時還不到結冰的時候)
3. 拉布拉多海 :(略,不凍海)
可以看出來,整體北極海冰情況不佳,原因北大西洋暖脊太強,又追根究柢暖化。
只能看看是否鄂霍次克海冰衝刺,後續觀察囉。
(以上供參了)
--
一切又變,北極渦旋未來一週再分雙心,增強速度變緩,
中心百帕高度場15100米以下的強烈北極渦旋,沒有異常增強情況,
此外,
北大西洋暖脊也影響了中亞脊,中亞少了深厚暖脊,
地面冷高壓也不會堆積到1065百帕以上的超級冷高壓,
反而中亞脊不夠強,但又有出現的情況下,
冷高壓面臨要在新疆還是蒙古發展的猶疑。
目前模式顯示,周二最終分裂高壓在蒙古南下,東亞寒潮爆發,
但相對原先模式比起來調弱許多。
對台灣來說,海洋的調節讓週二的冷高壓為東北季風冷空氣增強。
前幾天,由於北方冷高壓不強,沒有辦法有效抑制西風南支槽,
西風帶南移後,
西風氣流經過青藏高原分流效應的西風南支槽與南方副高對峙,
於是槽前/副高西北側的容易出現急流,
如果南方暖空氣對流較強,甚至有雷聲,有如春雨。
但,
前冬時期(跨年前之冬)冬季畢竟才前段,北極永夜持續擴大,
極地冷高壓勢力持續壯大,南支槽的活躍都不是真正活躍,
真正活躍的東亞大槽依舊占盡風頭,南支槽配合活動。
甚至,
連技不如"東亞大槽"的副高都要配合東亞大槽。
再看北極,真正厲害的是北大西洋暖脊,西風帶的大波動,
已經深入北極,導致北極雙心分成亞洲遠東和北美,
北極超冷凍氣團衝向哈德遜灣,另一股衝向台灣熟悉的"鄂霍次克海"
因此,
這個新冬季鄂霍次克海冰可期,反觀,巴倫支海冰狀況就不妙了。
環繞在北極中心的海區,
0.
中心:北極海/北冰洋 :目前海冰約達平均值的90%
1.
北極鄰海:1. 格陵蘭海 :目前海冰約達平均值的95%
2. 巴倫支海 :目前海冰約達平均值的40% >.<
3. 卡拉海 :目前海冰約達平均值的60%
4. 拉普提夫海 :目前海冰約達平均值的100%
5. 東西伯利亞海 :目前海冰約達平均值的100%
6. 楚科奇海 :目前海冰約達平均值的50% >.<
7. 波弗特海 :目前海冰約達平均值的100%
8. 加拿大北極群島間海域 :目前海冰約達平均值的100%
9. 巴芬灣 :目前海冰約達平均值的105% ^.^
2.
鄰北極圈海域:1. 哈德孫灣 :目前海冰約達平均值的50% >.<
2. 大衛斯海峽 :目前海冰約達平均值的100%
3. 丹麥海峽 :目前海冰約達平均值的50%
4. 挪威海 :(略,不凍海)
5. 白令海峽 :目前海冰約達平均值的50% >.<
3.
副極地海域:1. 白令海 :目前海冰約達平均值的60%
2. 鄂霍次克海 :(略,往年這時還不到結冰的時候)
3. 拉布拉多海 :(略,不凍海)
可以看出來,整體北極海冰情況不佳,原因北大西洋暖脊太強,又追根究柢暖化。
只能看看是否鄂霍次克海冰衝刺,後續觀察囉。
(以上供參了)
--
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