天氣小觀:南支槽東移,春雨 - 颱風討論

By Hardy
at 2017-03-21T14:10
at 2017-03-21T14:10
Table of Contents
天氣小觀:南支槽東移,春雨
目前南支槽正從孟加拉灣北部東移,
即將對上太平洋高壓的西北側,
預報低空西南風噴流將一路吹向華南地區到台灣北部。
同時噴流輻散區,地面誘發明顯得對流雲雨帶,正為春雨鋒面。
一路向東移往台灣,情況好的話,有機會再次出現春雷轟響。
同時間,南亞持續增溫,高空有反氣旋場向北突出,
導致中亞出現的暖脊,對應脊前西伯利亞冷氣團堆積,
地面場出現1040百帕以上的大陸高壓,未來一週後期高壓大舉南下,
這個就是之後的大戲-冬季系統猛烈侵襲。
目前東亞大槽仍靠近東亞,西伯利亞仍有大量的冷氣團,
因此,地面高壓從蒙古或西伯利亞吹出東北季風達台灣。
同時,也由於地面沙塵揚起,空氣中帶有懸浮塵埃,
另外因過渡季節,東北季風南下後減弱,冬季的地形性降雨減少,
因此,往往春天,不只中南部,全台都可能會出現空氣品質較差的現象。
這點與秋天,東亞大槽遠離東亞,地面高壓在東亞外海,
東北風帶來的秋高氣爽不同。
儘管春天往往空氣品質不是很好,
但隨著後天,春雨鋒面到來,屆時又會煥然一新。
至於後天的春雨強度,則要再觀察。
模式預報,南支槽東移後,與太平洋高壓對上後,
太平洋高壓勝出,但自身也受創,因冷暖對峙不算久,
一波春雨過後,天氣會很快回到穩定。
(快速說說,以上供參囉)
--
目前南支槽正從孟加拉灣北部東移,
即將對上太平洋高壓的西北側,
預報低空西南風噴流將一路吹向華南地區到台灣北部。
同時噴流輻散區,地面誘發明顯得對流雲雨帶,正為春雨鋒面。
一路向東移往台灣,情況好的話,有機會再次出現春雷轟響。
同時間,南亞持續增溫,高空有反氣旋場向北突出,
導致中亞出現的暖脊,對應脊前西伯利亞冷氣團堆積,
地面場出現1040百帕以上的大陸高壓,未來一週後期高壓大舉南下,
這個就是之後的大戲-冬季系統猛烈侵襲。
目前東亞大槽仍靠近東亞,西伯利亞仍有大量的冷氣團,
因此,地面高壓從蒙古或西伯利亞吹出東北季風達台灣。
同時,也由於地面沙塵揚起,空氣中帶有懸浮塵埃,
另外因過渡季節,東北季風南下後減弱,冬季的地形性降雨減少,
因此,往往春天,不只中南部,全台都可能會出現空氣品質較差的現象。
這點與秋天,東亞大槽遠離東亞,地面高壓在東亞外海,
東北風帶來的秋高氣爽不同。
儘管春天往往空氣品質不是很好,
但隨著後天,春雨鋒面到來,屆時又會煥然一新。
至於後天的春雨強度,則要再觀察。
模式預報,南支槽東移後,與太平洋高壓對上後,
太平洋高壓勝出,但自身也受創,因冷暖對峙不算久,
一波春雨過後,天氣會很快回到穩定。
(快速說說,以上供參囉)
--
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