天氣小觀:最新模式以西風槽壓倒性力量,下週抵 - 颱風討論
By Iris
at 2022-10-21T07:01
at 2022-10-21T07:01
Table of Contents
天氣小觀:最新模式以西風槽壓倒性力量,下週一抵碰北台灣高空
今早最新模式對北宜有了"減雨"的訊息,相對的25W發展前景就越不佳。
當然共伴條件就越不存在了!
25W是熱帶海面氣旋擾動向上發展,成颱後因為CISK機制對流爆發,
對流釋放潛熱,並對大氣高空環境有了改變,
因此才會有了南颱風 北西風槽 東太平洋高壓
這種秋季大三角的秋颱共伴系統。
不過,今早模式修正,週日起這波西風大槽展現壓倒性力量,下週一抵達北台灣,
因此,25W提供的暖溼氣流,爬升在東北季風之上後,很快會被西風氣流往東帶走,
這也是為何幾乎沒有聽說過"冬颱共伴、春颱共伴",這就是西風帶的高空氣流控場。
一旦,西風帶展現壓倒性力量的時候,高空變化結束了秋季大氣地面秀,
冬季系統接掌台灣後,就是北極渦旋稱霸大半個北半球的時候了。
當然,目前漸入的深秋大環境,南方熱海一片,
冬季系統的西風帶勢力與熱海氣旋+副高場還有一些爭奪戰沒結束。
值得注意的是,長期預報北極渦旋可能移進西伯利亞,
由於永夜擴大,北極渦旋處於增強期,快速增強的北極渦旋特色就是"跳躍南方潑灑寒流"
因此,
11月以後進入東亞寒潮爆發的季節,東亞要留意了。
台灣,就要看東亞沿海的暖暖墊如何了。
(目前渤海、黃海已經低於平均值,剩下東海暖暖墊撐住了)
(簡單說說囉)
--
今早最新模式對北宜有了"減雨"的訊息,相對的25W發展前景就越不佳。
當然共伴條件就越不存在了!
25W是熱帶海面氣旋擾動向上發展,成颱後因為CISK機制對流爆發,
對流釋放潛熱,並對大氣高空環境有了改變,
因此才會有了南颱風 北西風槽 東太平洋高壓
這種秋季大三角的秋颱共伴系統。
不過,今早模式修正,週日起這波西風大槽展現壓倒性力量,下週一抵達北台灣,
因此,25W提供的暖溼氣流,爬升在東北季風之上後,很快會被西風氣流往東帶走,
這也是為何幾乎沒有聽說過"冬颱共伴、春颱共伴",這就是西風帶的高空氣流控場。
一旦,西風帶展現壓倒性力量的時候,高空變化結束了秋季大氣地面秀,
冬季系統接掌台灣後,就是北極渦旋稱霸大半個北半球的時候了。
當然,目前漸入的深秋大環境,南方熱海一片,
冬季系統的西風帶勢力與熱海氣旋+副高場還有一些爭奪戰沒結束。
值得注意的是,長期預報北極渦旋可能移進西伯利亞,
由於永夜擴大,北極渦旋處於增強期,快速增強的北極渦旋特色就是"跳躍南方潑灑寒流"
因此,
11月以後進入東亞寒潮爆發的季節,東亞要留意了。
台灣,就要看東亞沿海的暖暖墊如何了。
(目前渤海、黃海已經低於平均值,剩下東海暖暖墊撐住了)
(簡單說說囉)
--
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