天氣小觀:冬季系統大進擊,後期正統東北季風 - 颱風討論
By Dinah
at 2017-04-21T11:30
at 2017-04-21T11:30
Table of Contents
天氣小觀:冬季系統大進擊,後期正統東北季風
最新模式預報,有了大驚奇,
冬季系統大進擊,未來一週後期竟然出現"正統"東北季風
東北季風南下,東亞沿海,台灣海峽、澎湖海域到巴士海峽都吹起強勁東北季風,
東亞全面降溫,太平洋高壓又躲起來了,
這情況在這時節並不多見,只能說大氣變幻莫測了~~~
因為一週後期,
整大片冷/涼空氣南下東亞,
地面高壓從西伯利亞往南延伸,
正統的東北季風再從西伯利亞吹到台灣,在四月下旬真是始料未及。
再度迎接有如冬季情況下的東北季風,
台灣溫度明顯轉冷轉涼,當然整個東亞也是。
一般四月下旬過後,進入梅雨季前,東亞的短波槽頻繁,
地面高壓南下通常是獨立個體,且變性的很快,移動也快。
因此,台灣的風場變化也很快,即便東北風很快轉為偏東風。
但一週後期,確有如此大不同,
原來是歐洲東部有阻塞高壓再發展,且中亞有割離低壓。
在阻塞高壓發展的過程中,
跑出一個快速東移的短波脊進入西伯利亞,
好巧不巧與已經轉為熱源的青藏高原產生的暖脊疊加,
兩脊疊加成大脊,東亞產生的大槽,槽後全轉為西風正北氣流,
讓西伯利亞東部的冷氣團藉著西風槽整片往東亞滑落。
屆時1032百帕的西伯利亞冷高壓往西(蒙古)調整,
東北季風也抵達台灣北部,隨著西風槽轉直,冷空氣南下,
然後太平洋高壓又躲起來了。
強勁的東北季風一直吹,天氣會涼爽一陣子。
一週後期,在降雨部份,
東北季風南下會遇上暖氣團大軍,
全台都有明顯雨勢,
尤其後期鋒面南移的過程中,南部雨勢會比較持續。
至於明後天則像是類東北季風的概念,猶如冬季系統的前鋒,
派出一獨立地面高壓南下試水溫,
但冷空氣的蠻強的,因次降溫明顯,只是畢竟試水溫,
因此不到兩天後就回溫,降雨一波也很快過去。
至於。未來一週後期的東北季風就有的瞧了。
(快速簡單說說,以上供參囉)
--
最新模式預報,有了大驚奇,
冬季系統大進擊,未來一週後期竟然出現"正統"東北季風
東北季風南下,東亞沿海,台灣海峽、澎湖海域到巴士海峽都吹起強勁東北季風,
東亞全面降溫,太平洋高壓又躲起來了,
這情況在這時節並不多見,只能說大氣變幻莫測了~~~
因為一週後期,
整大片冷/涼空氣南下東亞,
地面高壓從西伯利亞往南延伸,
正統的東北季風再從西伯利亞吹到台灣,在四月下旬真是始料未及。
再度迎接有如冬季情況下的東北季風,
台灣溫度明顯轉冷轉涼,當然整個東亞也是。
一般四月下旬過後,進入梅雨季前,東亞的短波槽頻繁,
地面高壓南下通常是獨立個體,且變性的很快,移動也快。
因此,台灣的風場變化也很快,即便東北風很快轉為偏東風。
但一週後期,確有如此大不同,
原來是歐洲東部有阻塞高壓再發展,且中亞有割離低壓。
在阻塞高壓發展的過程中,
跑出一個快速東移的短波脊進入西伯利亞,
好巧不巧與已經轉為熱源的青藏高原產生的暖脊疊加,
兩脊疊加成大脊,東亞產生的大槽,槽後全轉為西風正北氣流,
讓西伯利亞東部的冷氣團藉著西風槽整片往東亞滑落。
屆時1032百帕的西伯利亞冷高壓往西(蒙古)調整,
東北季風也抵達台灣北部,隨著西風槽轉直,冷空氣南下,
然後太平洋高壓又躲起來了。
強勁的東北季風一直吹,天氣會涼爽一陣子。
一週後期,在降雨部份,
東北季風南下會遇上暖氣團大軍,
全台都有明顯雨勢,
尤其後期鋒面南移的過程中,南部雨勢會比較持續。
至於明後天則像是類東北季風的概念,猶如冬季系統的前鋒,
派出一獨立地面高壓南下試水溫,
但冷空氣的蠻強的,因次降溫明顯,只是畢竟試水溫,
因此不到兩天後就回溫,降雨一波也很快過去。
至於。未來一週後期的東北季風就有的瞧了。
(快速簡單說說,以上供參囉)
--
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