天氣小觀:93W來輻合,明午後東北部回歸雨季 - 颱風討論
By Susan
at 2022-10-26T21:09
at 2022-10-26T21:09
Table of Contents
天氣小觀:93W來輻合,明午後東北部回歸雨季
就在一片秋涼氣爽的東北季風減弱東北風吹拂下,別忘了南方一片熱海,
大氣地面秀還沒結束,93W的出現代表又要開始了。
如果把之前的大氣地面秀都忘記,現在開始當作第一場大氣地面秀,
或許東北部-尤其宜蘭苦主心情會比較平穩些。
因為,
模式預報,明起東北部開始降雨,從週六到下週三,
一連五天可能都是大氣地面秀壓軸-秋颱共伴效應,
因此,
首要就是忘了之前的大氣地面秀,好好注意這次秋颱的共伴效應。
但不能不注意的是
宜蘭部分山區10月降雨累積都超過2500mm,加上這次的93W來勢...山區真的要留意啦。
模式顯示,
93W偏西接近菲律賓,預料持續發展成奈格颱風,由於環流結構大,
大氣高空場勢必與太平洋高壓聯手,把赤道氣團最濕熱的水氣帶上來台灣,
1.
由於高空釋放潛熱,因此西風槽會很穩定的位於台灣北方,壓不到南方,
=> 秋颱共伴之"北西風槽"配置到位。
2.
由於93W初始誕生整合環流夠大,發展起來勢必對太平洋高壓有一定能力的推擠,
模式顯示,93W發展成颱離開呂宋島後,強度會再增強,
且北方有西風槽東移,槽前的輻散環境更好,
屆時太平洋高壓勢必東退讓出93W-準奈格的北側,
=> 秋颱共伴之"東太平洋高壓"配置到位。
3.
最後就是93W-準奈格本身就通過台灣以南的菲律賓呂宋島,緯度低熱海條件佳,
因此93W不只是擾動會低壓,甚至有機會發展到大環流的中度颱風,
=> 秋颱共伴之"南颱風"配置到位。
再來看看,比較緩和的共伴,
當然就是93W-準奈格從台灣以東就北轉,如此一來共伴環流就會位於海上,
但這也是一種賭注,
從台灣以東的海面北轉,東北季風+颱風環流會讓"東北季風發瘋"
地面噴流非常猛烈,因此若93W-準奈格颱風太接近台灣,
輻合降雨落在台灣的話,北部東北部迎風山區的猛烈雨勢就會像是定格一樣,日夜永恆。
另外一條路徑走南台灣登陸,東部和南部雨勢會很劇烈,
到時候變成北、東、南互相飆雨,
北部:東北季風和93W-準奈格外圍環流共伴效應
東部:93W-準奈格東南風環流
南部:93W-準奈格中心環流
而且,
南部再加碼吃暴風。
因此,準奈格颱風的路徑示決定影響台灣的天壤之別,
只是,秋季大氣地面秀的難以追摸,不排除又有甚麼特殊路徑
繼續觀察下去了
(以上供參囉)
--
就在一片秋涼氣爽的東北季風減弱東北風吹拂下,別忘了南方一片熱海,
大氣地面秀還沒結束,93W的出現代表又要開始了。
如果把之前的大氣地面秀都忘記,現在開始當作第一場大氣地面秀,
或許東北部-尤其宜蘭苦主心情會比較平穩些。
因為,
模式預報,明起東北部開始降雨,從週六到下週三,
一連五天可能都是大氣地面秀壓軸-秋颱共伴效應,
因此,
首要就是忘了之前的大氣地面秀,好好注意這次秋颱的共伴效應。
但不能不注意的是
宜蘭部分山區10月降雨累積都超過2500mm,加上這次的93W來勢...山區真的要留意啦。
模式顯示,
93W偏西接近菲律賓,預料持續發展成奈格颱風,由於環流結構大,
大氣高空場勢必與太平洋高壓聯手,把赤道氣團最濕熱的水氣帶上來台灣,
1.
由於高空釋放潛熱,因此西風槽會很穩定的位於台灣北方,壓不到南方,
=> 秋颱共伴之"北西風槽"配置到位。
2.
由於93W初始誕生整合環流夠大,發展起來勢必對太平洋高壓有一定能力的推擠,
模式顯示,93W發展成颱離開呂宋島後,強度會再增強,
且北方有西風槽東移,槽前的輻散環境更好,
屆時太平洋高壓勢必東退讓出93W-準奈格的北側,
=> 秋颱共伴之"東太平洋高壓"配置到位。
3.
最後就是93W-準奈格本身就通過台灣以南的菲律賓呂宋島,緯度低熱海條件佳,
因此93W不只是擾動會低壓,甚至有機會發展到大環流的中度颱風,
=> 秋颱共伴之"南颱風"配置到位。
再來看看,比較緩和的共伴,
當然就是93W-準奈格從台灣以東就北轉,如此一來共伴環流就會位於海上,
但這也是一種賭注,
從台灣以東的海面北轉,東北季風+颱風環流會讓"東北季風發瘋"
地面噴流非常猛烈,因此若93W-準奈格颱風太接近台灣,
輻合降雨落在台灣的話,北部東北部迎風山區的猛烈雨勢就會像是定格一樣,日夜永恆。
另外一條路徑走南台灣登陸,東部和南部雨勢會很劇烈,
到時候變成北、東、南互相飆雨,
北部:東北季風和93W-準奈格外圍環流共伴效應
東部:93W-準奈格東南風環流
南部:93W-準奈格中心環流
而且,
南部再加碼吃暴風。
因此,準奈格颱風的路徑示決定影響台灣的天壤之別,
只是,秋季大氣地面秀的難以追摸,不排除又有甚麼特殊路徑
繼續觀察下去了
(以上供參囉)
--
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颱風
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