天氣速觀:最新模式下週末跑出台灣首波寒流 - 颱風討論
By Isabella
at 2022-12-11T08:06
at 2022-12-11T08:06
Table of Contents
92W已經增強為29W,大氣中低層北側對應到台灣東北方的反氣旋,
不過反氣旋稍弱,於是反氣旋西側較急的氣流變成"雪山山脈以北"往東海,
今早重雨區(重點降雨趨)從宜蘭南方山區跑到東北角北海岸,
不過,高空西風槽南壓的力道,29W受槽前氣流導引將轉東北,
但同時槽前還有另一股西南西風急流也會在福建沿海到台灣海峽中部建立,
高層急流的右後側同樣落在北宜,並且擴大到中部以北都有利降雨,
但因為中部是東北季風背風面,降雨較緩和,北部東北部則還要再下。
但另一個重點就是最新模式下週末東亞大寒潮與台灣首波寒流,
大氣環境顯示,下週六大氣中層西風槽底南壓到台灣北部海面,
槽後的高空偏北氣流直接把極地冷氣團帶到長江流域以南,
強烈蒙古冷高壓直接南移至南嶺北側且還維持1040百帕以上的一定強度,
東北季風直吹赤道,台灣南方的副高場整個被擊潰,
是否真的這麼強,還有待觀察,但若是如此,
1. 台灣受冷高壓從上海帶出的乾冷空氣直接影響,
除了東北部零星山區日夜效應加乘的地形雨。
2. 由於中層西風帶移到台灣南側,
這表示不用看"西風南支槽的偏南氣流",變成要看"西風北支槽的偏北氣流",
西風南支槽的偏南氣不斷影響,會導致多天降雨,
西風北支槽的偏北氣不斷影響,會導致多天寒冷,
因此要注意,如此一來,台灣一連多天的冷氣團,會很冷!
距今還有一段時間,後續再觀察,可能還會調整
(以上供參參)
--
不過反氣旋稍弱,於是反氣旋西側較急的氣流變成"雪山山脈以北"往東海,
今早重雨區(重點降雨趨)從宜蘭南方山區跑到東北角北海岸,
不過,高空西風槽南壓的力道,29W受槽前氣流導引將轉東北,
但同時槽前還有另一股西南西風急流也會在福建沿海到台灣海峽中部建立,
高層急流的右後側同樣落在北宜,並且擴大到中部以北都有利降雨,
但因為中部是東北季風背風面,降雨較緩和,北部東北部則還要再下。
但另一個重點就是最新模式下週末東亞大寒潮與台灣首波寒流,
大氣環境顯示,下週六大氣中層西風槽底南壓到台灣北部海面,
槽後的高空偏北氣流直接把極地冷氣團帶到長江流域以南,
強烈蒙古冷高壓直接南移至南嶺北側且還維持1040百帕以上的一定強度,
東北季風直吹赤道,台灣南方的副高場整個被擊潰,
是否真的這麼強,還有待觀察,但若是如此,
1. 台灣受冷高壓從上海帶出的乾冷空氣直接影響,
除了東北部零星山區日夜效應加乘的地形雨。
2. 由於中層西風帶移到台灣南側,
這表示不用看"西風南支槽的偏南氣流",變成要看"西風北支槽的偏北氣流",
西風南支槽的偏南氣不斷影響,會導致多天降雨,
西風北支槽的偏北氣不斷影響,會導致多天寒冷,
因此要注意,如此一來,台灣一連多天的冷氣團,會很冷!
距今還有一段時間,後續再觀察,可能還會調整
(以上供參參)
--
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颱風
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