模式預報,未來一周後期菲東海域熱帶擾動發展 - 颱風討論

By Ula
at 2017-04-08T22:38
at 2017-04-08T22:38
Table of Contents
模式預報,未來一周後期菲律賓東方海域熱帶擾動發展
目前印尼地區出現強烈降雨,顯示赤道輻合帶ITCZ北移,
並且當地有許多低壓擾動結合成一大低壓區,在南北半球各自發展出封閉的氣旋對,
在北半球的東經150度的西太平洋海面上開始出現熱帶擾動,並逐漸向西北西移動,
模式預報,未來一周,擾動慢慢由太平洋高壓接上引導,
接近菲律賓東方海域,有助發展的跡象,
部分模式預報有機會變成熱帶性低氣壓,也有部分模式預報直接發展成為颱風。
路徑部分也有直接穿越菲律賓與北上兩種。
模式預報對於強度與路徑分歧的原因在現在正屬過渡季節的四月初,
現在的大氣環境對太平洋高壓來說有點友善,但又不太友善。
目前西風帶仍未北抬,南亞高壓又還見不到影子,
但這時節南亞增溫高空輻散的反氣旋或西風脊,又有利太平洋高壓向西連結。
因此,太平洋高壓在這時節的勢力場分布凌亂,
未來一周,菲東的熱帶擾動與太平洋高壓的互動的變數頗大。
短期而言,對台灣沒有任何影響。
對台灣有影響的還是下周的鋒面,
預報又調弱鋒面,不過還是有機會碰到台灣,
北部率先降雨,後續南支槽的西南風,有機會再為南部帶來一些雨水。
不過,後期熱帶擾動的發展,就蠻關鍵了,再觀察囉。
值得注意的是,中南半島西南側,
孟加拉灣海域的副高下周減弱,
這表示對流降雨釋放的潛熱試圖衝破副高障壁,
當然這與印尼-馬來西亞地區也爆發大量對流降雨有關,
不過離西南季風爆發還有不少的一段時間。
(快速說說,以上供參嚕)
--
目前印尼地區出現強烈降雨,顯示赤道輻合帶ITCZ北移,
並且當地有許多低壓擾動結合成一大低壓區,在南北半球各自發展出封閉的氣旋對,
在北半球的東經150度的西太平洋海面上開始出現熱帶擾動,並逐漸向西北西移動,
模式預報,未來一周,擾動慢慢由太平洋高壓接上引導,
接近菲律賓東方海域,有助發展的跡象,
部分模式預報有機會變成熱帶性低氣壓,也有部分模式預報直接發展成為颱風。
路徑部分也有直接穿越菲律賓與北上兩種。
模式預報對於強度與路徑分歧的原因在現在正屬過渡季節的四月初,
現在的大氣環境對太平洋高壓來說有點友善,但又不太友善。
目前西風帶仍未北抬,南亞高壓又還見不到影子,
但這時節南亞增溫高空輻散的反氣旋或西風脊,又有利太平洋高壓向西連結。
因此,太平洋高壓在這時節的勢力場分布凌亂,
未來一周,菲東的熱帶擾動與太平洋高壓的互動的變數頗大。
短期而言,對台灣沒有任何影響。
對台灣有影響的還是下周的鋒面,
預報又調弱鋒面,不過還是有機會碰到台灣,
北部率先降雨,後續南支槽的西南風,有機會再為南部帶來一些雨水。
不過,後期熱帶擾動的發展,就蠻關鍵了,再觀察囉。
值得注意的是,中南半島西南側,
孟加拉灣海域的副高下周減弱,
這表示對流降雨釋放的潛熱試圖衝破副高障壁,
當然這與印尼-馬來西亞地區也爆發大量對流降雨有關,
不過離西南季風爆發還有不少的一段時間。
(快速說說,以上供參嚕)
--
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