天氣小觀:面迎春寒 - 颱風討論
By Freda
at 2017-03-24T00:41
at 2017-03-24T00:41
Table of Contents
天氣小觀:面迎春寒
夏季系統崛起後,南有暖氣團,北有冷氣團,冷暖對峙下,
把過渡間帶的台灣南北溫差拉大,南來北往可以感受到明顯的溫差。
然而,模式預報未來一周開始有了變化,冬季系統將再次進擊。
目前預報未來一周,一周過後,一周過後再過後,
一波接著一波,變冷回暖再變冷,而且看來一波比一波來的有氣勢。
正月凍死龜,二月凍死牛,三月凍死播田夫。
大氣瞬息萬變,在時空換界下,北極渦旋漸弱,南極渦旋增強,
地球高空最強的冷渦旋未來一周開始易主為南極渦旋,
南極海冰開始明顯增加。
然而,北極海冰融化時,吸熱的過程讓人覺得下雪不冷融雪冷。
但其實是誤解,因為根據熱力學第二定律就明白指出,熱不會自動從低溫跑到高溫,
因此融雪時氣溫一定是較溫暖的...
雪融日暖瓊肌膩,酒暈生香。
也就是水結冰放熱,放熱過程不會使環境溫度不能高於0度C,否則逆轉不發生,同樣的,
冰融水吸熱,吸熱過程也不會使環境溫度低於0度C。
目前北極外圍的北大西洋海冰面積正遞減,但北極海區依然是鞏固未鬆動的海冰區,
儘管日照的輻射開始回歸,但海冰反射率超過50%,
這使得太陽到達地球的熱能,經過層層吸收後好不容易到達地表的熱能,
碰到地表上的海冰反射後,一大半又被踢了出來。
因此,
極區的冰帽能有效的控制地球增溫,一旦極區冰帽逐年的平均縮減,意味著全球暖化。
寒冰不能斷流水,枯木也會再逢春。
模式預報,由於中亞脊對應東亞大槽增強,第一波冷空氣或冷氣團後天起南下,
接著北極震盪,冷凍氣團入侵俄羅斯,第二波中亞脊又對應東亞西風槽,
因此一周過後,也就是四月初,冷空氣再次大舉南下,
連續兩波的冷空氣強度都不弱,有機會到達冷氣團等級,
甚至第二波冷空氣預報看來有點猛,不旦氣走太平洋高壓,
也有可能會成為強烈冷氣團,不過時間有點遠,需要再觀察。
一周過後的過後,大範圍北極冷凍氣團,入侵俄羅斯並往西伯利亞移動中,
這股冷凍氣團範圍很大,溫度很低,所到之處急凍,
氣勢更勝未來一周西伯利亞的冷氣團,
由於春天系統變化快速,尤其大氣精彩在高空,
因此,這一大坨來自北凍的冷凍氣團,高空系統會如何導引,屆時要留意觀察。
此外,前兩天的西風南支槽東移減弱很快,因此今天的春雨不多,
太平洋高壓的西北側噴流出現在外海,不在台灣,
這也表示太平洋高壓勢力還無法直接影響台灣。(外圍的間接影響倒已讓南部很溫暖了)
未來一周台灣降雨也不算多,主要為冷空氣南下,冷鋒通過,北部降雨為主。
由於,南方的副高場影響,北方有地面冷高壓抑制,
西風南支槽又呈現不活躍,華南雲雨帶發展不良。
(簡單說說,以上供參囉)
--
夏季系統崛起後,南有暖氣團,北有冷氣團,冷暖對峙下,
把過渡間帶的台灣南北溫差拉大,南來北往可以感受到明顯的溫差。
然而,模式預報未來一周開始有了變化,冬季系統將再次進擊。
目前預報未來一周,一周過後,一周過後再過後,
一波接著一波,變冷回暖再變冷,而且看來一波比一波來的有氣勢。
正月凍死龜,二月凍死牛,三月凍死播田夫。
大氣瞬息萬變,在時空換界下,北極渦旋漸弱,南極渦旋增強,
地球高空最強的冷渦旋未來一周開始易主為南極渦旋,
南極海冰開始明顯增加。
然而,北極海冰融化時,吸熱的過程讓人覺得下雪不冷融雪冷。
但其實是誤解,因為根據熱力學第二定律就明白指出,熱不會自動從低溫跑到高溫,
因此融雪時氣溫一定是較溫暖的...
雪融日暖瓊肌膩,酒暈生香。
也就是水結冰放熱,放熱過程不會使環境溫度不能高於0度C,否則逆轉不發生,同樣的,
冰融水吸熱,吸熱過程也不會使環境溫度低於0度C。
目前北極外圍的北大西洋海冰面積正遞減,但北極海區依然是鞏固未鬆動的海冰區,
儘管日照的輻射開始回歸,但海冰反射率超過50%,
這使得太陽到達地球的熱能,經過層層吸收後好不容易到達地表的熱能,
碰到地表上的海冰反射後,一大半又被踢了出來。
因此,
極區的冰帽能有效的控制地球增溫,一旦極區冰帽逐年的平均縮減,意味著全球暖化。
寒冰不能斷流水,枯木也會再逢春。
模式預報,由於中亞脊對應東亞大槽增強,第一波冷空氣或冷氣團後天起南下,
接著北極震盪,冷凍氣團入侵俄羅斯,第二波中亞脊又對應東亞西風槽,
因此一周過後,也就是四月初,冷空氣再次大舉南下,
連續兩波的冷空氣強度都不弱,有機會到達冷氣團等級,
甚至第二波冷空氣預報看來有點猛,不旦氣走太平洋高壓,
也有可能會成為強烈冷氣團,不過時間有點遠,需要再觀察。
一周過後的過後,大範圍北極冷凍氣團,入侵俄羅斯並往西伯利亞移動中,
這股冷凍氣團範圍很大,溫度很低,所到之處急凍,
氣勢更勝未來一周西伯利亞的冷氣團,
由於春天系統變化快速,尤其大氣精彩在高空,
因此,這一大坨來自北凍的冷凍氣團,高空系統會如何導引,屆時要留意觀察。
此外,前兩天的西風南支槽東移減弱很快,因此今天的春雨不多,
太平洋高壓的西北側噴流出現在外海,不在台灣,
這也表示太平洋高壓勢力還無法直接影響台灣。(外圍的間接影響倒已讓南部很溫暖了)
未來一周台灣降雨也不算多,主要為冷空氣南下,冷鋒通過,北部降雨為主。
由於,南方的副高場影響,北方有地面冷高壓抑制,
西風南支槽又呈現不活躍,華南雲雨帶發展不良。
(簡單說說,以上供參囉)
--
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at 2019-04-17T17:10
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