天氣小觀:未來一週,環境場-大規模東北季風來了 - 颱風討論
By Skylar Davis
at 2019-10-10T10:54
at 2019-10-10T10:54
Table of Contents
天氣小觀:未來一週,環境場-大規模東北季風來了
強烈颱風哈吉貝與之前米塔颱風類似,再度頂開太平洋高壓北上,
儘管距離遙遠,但颱風的大風暴場北上有利西伯利亞冷高壓南下,
因此明天起,
環境場-大規模東北季風/溫度場-大規模類東北季風 吹至,
星期六開始溫度漸漸往下掉,一周後期850帕12度線已經到台灣北部了,
不過,由於這節氣-寒露,
對台灣來說,太陽日照還是有點威力,
因此,地面溫度降溫比較慢些,低溫還能保持20度以上,
因此,秋高氣爽,惟台灣東北部例外。
寒露不算冷,霜降變了天
對大漠東北來說,寒露是最後一個秋節氣,
下一個節氣霜降,就是初冬開始的季節了。
對東亞陸地來說,寒露是離人心上秋意濃,
下一個節氣霜降,就是秋收備冬的季節了。
對南方海島來說,寒露是秋高氣爽的舒適,
下一個節氣霜降,就是變冷節奏的深秋了。
( 以大環境時期來看,11月、12月:前冬時期(跨年前之冬)
1月、 2月:後冬時期(跨年後之冬)
以年份來看,2019冬 => 通常是只2019年末的冬季
2019前期冬 => 2019年初的冬季
2019後期冬 => 2019年末的冬季
)
但不管對南北來說,寒露就是秋風起兮的時節,
北大漠,候鳥全南飛,遺落日餘暉,
中東亞,悄悄黃花落,林風不解憂,
南小島,海上大湧浪,岸上瘋狗浪。
模式預報,未來一週,北極渦旋增強明顯,
中心100百帕高度場從目前15800米(想像是980百帕氣旋),
下週增強到15600米(想像是960百帕氣旋),
整個北極海面溫度幾乎都降到0度以下,
只是,
對北極海冰形成條件:海面溫度零下5度,穩定增加=>海面溫度零下10度。
因此,
北極海冰面積要大幅增加還需要一點時間。
而,
北極渦旋的崛起,最重要就是北極冷凍氣團是否外洩,
模式預報看來是在北極留與不留是拉鋸,
原因在於,西伯利亞大氣中層的超級大冷渦旋,
這冷渦旋勢力之龐大,模式顯示,連強颱哈吉貝都將瞬間消失。
和初秋颱風北上攪亂一池冷空氣的情況完全不可類比,
無視於強颱哈吉貝北上,西伯利亞高空超級大冷渦旋會在星期六瞬殺哈吉貝,
(可憐的風王哈吉貝)
當然,西伯利亞高空大冷渦能力不僅如此,
輕鬆解決哈吉貝後,接著就是延伸出西風槽,砍向太平洋高壓牆,
太平洋高壓入秋面對以來最強對手,呈現有點無力招架,
被哈吉貝切斷的西側太平洋高壓單體退至中南半島,
500百帕東側太平洋高壓主體退至北緯30度以南的日本東南方海面,
這是太平洋高壓今年首度"回不去"的南退,
下次再往北緯30度以北要等到明年夏天了。
太平洋高壓南退低於北緯30度後,台灣就處於太平洋高壓西側,
因此,北西風槽,東太平洋高壓的大氣環境配置有利秋颱共伴,
不過南方並沒有颱風,且目前看來,
太平洋高壓偏弱,之後形成的颱風自遠洋北上機率高。
下週一以後,西風槽後的蒙古冷高壓東北季風吹至,
東北部陰雨綿綿的季節開始。
西半部依舊偏向秋高氣爽,東西差很大。
再來就是看北極渦旋了,
一周過後,北極渦旋中心區似乎有零下25度出現了。
看來,永夜的威力真的很猛烈,不久就看東亞的:"第一滴雪" 。
北極雪下在那頭,寂寞不寂寞
(以上供參囉)
--
強烈颱風哈吉貝與之前米塔颱風類似,再度頂開太平洋高壓北上,
儘管距離遙遠,但颱風的大風暴場北上有利西伯利亞冷高壓南下,
因此明天起,
環境場-大規模東北季風/溫度場-大規模類東北季風 吹至,
星期六開始溫度漸漸往下掉,一周後期850帕12度線已經到台灣北部了,
不過,由於這節氣-寒露,
對台灣來說,太陽日照還是有點威力,
因此,地面溫度降溫比較慢些,低溫還能保持20度以上,
因此,秋高氣爽,惟台灣東北部例外。
寒露不算冷,霜降變了天
對大漠東北來說,寒露是最後一個秋節氣,
下一個節氣霜降,就是初冬開始的季節了。
對東亞陸地來說,寒露是離人心上秋意濃,
下一個節氣霜降,就是秋收備冬的季節了。
對南方海島來說,寒露是秋高氣爽的舒適,
下一個節氣霜降,就是變冷節奏的深秋了。
( 以大環境時期來看,11月、12月:前冬時期(跨年前之冬)
1月、 2月:後冬時期(跨年後之冬)
以年份來看,2019冬 => 通常是只2019年末的冬季
2019前期冬 => 2019年初的冬季
2019後期冬 => 2019年末的冬季
)
但不管對南北來說,寒露就是秋風起兮的時節,
北大漠,候鳥全南飛,遺落日餘暉,
中東亞,悄悄黃花落,林風不解憂,
南小島,海上大湧浪,岸上瘋狗浪。
模式預報,未來一週,北極渦旋增強明顯,
中心100百帕高度場從目前15800米(想像是980百帕氣旋),
下週增強到15600米(想像是960百帕氣旋),
整個北極海面溫度幾乎都降到0度以下,
只是,
對北極海冰形成條件:海面溫度零下5度,穩定增加=>海面溫度零下10度。
因此,
北極海冰面積要大幅增加還需要一點時間。
而,
北極渦旋的崛起,最重要就是北極冷凍氣團是否外洩,
模式預報看來是在北極留與不留是拉鋸,
原因在於,西伯利亞大氣中層的超級大冷渦旋,
這冷渦旋勢力之龐大,模式顯示,連強颱哈吉貝都將瞬間消失。
和初秋颱風北上攪亂一池冷空氣的情況完全不可類比,
無視於強颱哈吉貝北上,西伯利亞高空超級大冷渦旋會在星期六瞬殺哈吉貝,
(可憐的風王哈吉貝)
當然,西伯利亞高空大冷渦能力不僅如此,
輕鬆解決哈吉貝後,接著就是延伸出西風槽,砍向太平洋高壓牆,
太平洋高壓入秋面對以來最強對手,呈現有點無力招架,
被哈吉貝切斷的西側太平洋高壓單體退至中南半島,
500百帕東側太平洋高壓主體退至北緯30度以南的日本東南方海面,
這是太平洋高壓今年首度"回不去"的南退,
下次再往北緯30度以北要等到明年夏天了。
太平洋高壓南退低於北緯30度後,台灣就處於太平洋高壓西側,
因此,北西風槽,東太平洋高壓的大氣環境配置有利秋颱共伴,
不過南方並沒有颱風,且目前看來,
太平洋高壓偏弱,之後形成的颱風自遠洋北上機率高。
下週一以後,西風槽後的蒙古冷高壓東北季風吹至,
東北部陰雨綿綿的季節開始。
西半部依舊偏向秋高氣爽,東西差很大。
再來就是看北極渦旋了,
一周過後,北極渦旋中心區似乎有零下25度出現了。
看來,永夜的威力真的很猛烈,不久就看東亞的:"第一滴雪" 。
北極雪下在那頭,寂寞不寂寞
(以上供參囉)
--
Tags:
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