天氣小觀:璨樹明起東北遠離後,太平洋高壓再籠罩 - 颱風討論
By Brianna
at 2021-09-16T07:35
at 2021-09-16T07:35
Table of Contents
天氣小觀:璨樹明起東北遠離後,太平洋高壓再度重新籠罩
夏季季風爆發的徵兆就是熱低壓的發展,導致副高斷裂,
等太平洋高壓東退,就建立起南海西南季風。
冬季季風南下的徵兆就是冷高壓的發展,使西風槽更強,
等西風大槽延伸出來,就是東北季風的登場。
然而,過渡季節的天氣總是有很多預報難以掌握的地方,
春天高空秀快速變化的大氣系統,北方高空的冷槽區不斷被暖空氣刺激,西風槽轉直鋒面
相反的,
秋季的高空反而緩慢許多,但南方地面的熱海區不斷被冷空氣刺激,南北氣旋一個個出現
因此在秋季,影響東亞大氣變化的因子莫過於氣旋了。
(
冬季北方海面結冰,氣旋在白令海活躍,西伯利亞,東北亞,東亞都是冷高壓掌控
春季南北海溫仍低,
夏季海陸溫差縮小,
反而在秋季,陸地迅速降溫,但海溫仍高,於是北方好發溫帶氣旋,南方好發熱帶氣旋。
)
目前大氣高層,南亞高壓和西風噴流還在互相對峙,北極渦旋要到月底才開始壯大,
至於大氣中層,500百帕高度場歐洲沿岸現在是脊區,未來一週還是脊區,
歐洲內陸到莫斯科受冷槽影響,未來一週還是受冷槽影響,
中亞有西風脊發展,未來一週還在發展...
北方大氣高空系統緩慢進展,南方大氣高空的單調更是有過之;
因此,
主要看的都是大氣地面系統的變化。
由於璨樹颱風還逗留在東海與黃海交界,繼續洗南北氣流,
大大影響了地面冷高壓的發展,台灣短時間不會有東北季風登場,
不過,
青藏高原上的冷空氣倒是受惠於璨樹颱風滯留而堆積為高壓,
雲貴高原呈現溫帶氣旋的發展態勢,
模式預報週日往東北移動發展為溫帶氣旋,旋臂帶出冷鋒通過東亞,
但東亞仍由較強的暖氣團掌控,因此下週微弱冷鋒對台灣影響不大。
再來就是下週四以後,
如果有從日本海過來的東北風/類東北季風也許可以算半秋風(但白天感受不到)。
但模式現在仍持續預報是太平洋高壓/南方氣旋的偏東風。
話雖如此,擅長從地面偷渡的偏北風南下與南方氣流輻合,就會上演秋季地面秀,
例如北部今早又突然降雨,
璨樹颱風西北風南下東海與台灣海峽北部西南風輻合,
偏西風把海面水氣往內陸推,撞上夜晚的山風降雨。
可說是輻合後的海陸風降雨。
明起槽線來牽引,璨樹往東北遠離,之後太平洋高壓重新西伸籠罩台灣,
但高壓不算強勢,因此璨樹颱風遠離後,先偏北風南下以及轉偏東風下,
午後熱力作用山區仍然容易降雨。
亦即,
模式預報未來一週又回到晴時多雲偶陣雨的天氣。
再來就是觀察新的地面氣旋秀了。
以古觀之氣象,
帶有癸水,甲乙木的璨樹颱風遠離,
丙火太平洋高壓影響,白天(9~13時,巳時午時),丙火與丁火的火氣旺盛,不易降雨,
下午(15時,申時以後),火氣減弱,有機會降雨尤其山區,
山區飽含水氣為濕土辰庫,辰土藏有雨水癸之氣,就等適當時機化為雨水。
此外,
酉月為辛金之氣遇丙火開始化水,因此白天炎熱,夜晚化為露水。
結論:很多人仍在等,天氣小觀也在等,到底何時,文人才能吟詩道秋涼呢?
(以上供參囉)
--
夏季季風爆發的徵兆就是熱低壓的發展,導致副高斷裂,
等太平洋高壓東退,就建立起南海西南季風。
冬季季風南下的徵兆就是冷高壓的發展,使西風槽更強,
等西風大槽延伸出來,就是東北季風的登場。
然而,過渡季節的天氣總是有很多預報難以掌握的地方,
春天高空秀快速變化的大氣系統,北方高空的冷槽區不斷被暖空氣刺激,西風槽轉直鋒面
相反的,
秋季的高空反而緩慢許多,但南方地面的熱海區不斷被冷空氣刺激,南北氣旋一個個出現
因此在秋季,影響東亞大氣變化的因子莫過於氣旋了。
(
冬季北方海面結冰,氣旋在白令海活躍,西伯利亞,東北亞,東亞都是冷高壓掌控
春季南北海溫仍低,
夏季海陸溫差縮小,
反而在秋季,陸地迅速降溫,但海溫仍高,於是北方好發溫帶氣旋,南方好發熱帶氣旋。
)
目前大氣高層,南亞高壓和西風噴流還在互相對峙,北極渦旋要到月底才開始壯大,
至於大氣中層,500百帕高度場歐洲沿岸現在是脊區,未來一週還是脊區,
歐洲內陸到莫斯科受冷槽影響,未來一週還是受冷槽影響,
中亞有西風脊發展,未來一週還在發展...
北方大氣高空系統緩慢進展,南方大氣高空的單調更是有過之;
因此,
主要看的都是大氣地面系統的變化。
由於璨樹颱風還逗留在東海與黃海交界,繼續洗南北氣流,
大大影響了地面冷高壓的發展,台灣短時間不會有東北季風登場,
不過,
青藏高原上的冷空氣倒是受惠於璨樹颱風滯留而堆積為高壓,
雲貴高原呈現溫帶氣旋的發展態勢,
模式預報週日往東北移動發展為溫帶氣旋,旋臂帶出冷鋒通過東亞,
但東亞仍由較強的暖氣團掌控,因此下週微弱冷鋒對台灣影響不大。
再來就是下週四以後,
如果有從日本海過來的東北風/類東北季風也許可以算半秋風(但白天感受不到)。
但模式現在仍持續預報是太平洋高壓/南方氣旋的偏東風。
話雖如此,擅長從地面偷渡的偏北風南下與南方氣流輻合,就會上演秋季地面秀,
例如北部今早又突然降雨,
璨樹颱風西北風南下東海與台灣海峽北部西南風輻合,
偏西風把海面水氣往內陸推,撞上夜晚的山風降雨。
可說是輻合後的海陸風降雨。
明起槽線來牽引,璨樹往東北遠離,之後太平洋高壓重新西伸籠罩台灣,
但高壓不算強勢,因此璨樹颱風遠離後,先偏北風南下以及轉偏東風下,
午後熱力作用山區仍然容易降雨。
亦即,
模式預報未來一週又回到晴時多雲偶陣雨的天氣。
再來就是觀察新的地面氣旋秀了。
以古觀之氣象,
帶有癸水,甲乙木的璨樹颱風遠離,
丙火太平洋高壓影響,白天(9~13時,巳時午時),丙火與丁火的火氣旺盛,不易降雨,
下午(15時,申時以後),火氣減弱,有機會降雨尤其山區,
山區飽含水氣為濕土辰庫,辰土藏有雨水癸之氣,就等適當時機化為雨水。
此外,
酉月為辛金之氣遇丙火開始化水,因此白天炎熱,夜晚化為露水。
結論:很多人仍在等,天氣小觀也在等,到底何時,文人才能吟詩道秋涼呢?
(以上供參囉)
--
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颱風
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