天氣小觀:模式預報,副高趴了 - 颱風討論

By Zenobia
at 2016-03-15T21:27
at 2016-03-15T21:27
Table of Contents
天氣小觀:模式預報,副高趴了
原先預報的副高振作,結果振作不如預期,
而且@@ 最新模式預報又指出,副高之後的振作幅度不大,
後期竟然趴了。
因此,台灣天氣未來一周不穩定天數居多。
春天的高空場變化大,而且目前高空西風系統波動移動快速,
帶對應地面的一周內可能會有兩次大陸高壓南下然後出海。
副高北側的中低層西風急流從華南往台灣輻散,
低層有變性高壓的回南風輻合,
因此從華南到台灣不斷有雲雨帶生長。
不過儘管,副高趴下去,但北方短時間內沒有強冷空氣南下,
因此,預報未來一周內來看,溫度不至於出現冷氣團,
不過,因為地面冷高壓一波接著一波,
回升空檔只有一兩天,接著又是東北季風報到。
東北季風在三月仍有一些影響力,
不過隨著青藏高原從冷源轉為熱源,
暖空氣流向蒙古,蒙古冷高壓無法立足
因此到了4月初,台灣就會和東北季風道別。
此後的近半年,也無緣再見到。
不過,高空系統在春天則是非常活躍,
像是副高和西風槽的角力戰,後期還有南亞高壓和西風噴流。
以及東亞梅雨季開始的高空形勢,
像是一大槽一大脊或是兩槽一脊等,都會有不同的梅雨特徵。
因此春天的高空系統變化多端,令人嘆為觀止。
反映到地面可以看到華南雲雨帶消消長長。
這些在秋天的高空場,是比不上春天的。
不過秋天的地面場,也是春天比不上的。
秋天地面場上演的東北季風大戰西南季風;以及熱帶擾動的驚奇。
也是春天難以比較的。
因此,雖然同為過渡期,大氣的反向變化,
但春秋仍各有特色。
最後再看看未來一周,
由於副高振作不夠,整體來看,冬季系統占了上風。
不過明天起的兩天空檔,由於回南風,溫度會上升較溫暖。
但預報後期東北亞高空出現較強的冷渦旋系統,
對應地面有較明顯的冷高壓南下,然後副高又趴了,只能說三月的副高還是弱。
不過冷高壓的降溫,是否又成就一波冷氣團,那是一周過後的事,需要再再觀察。
(以上供參囉)
--
原先預報的副高振作,結果振作不如預期,
而且@@ 最新模式預報又指出,副高之後的振作幅度不大,
後期竟然趴了。
因此,台灣天氣未來一周不穩定天數居多。
春天的高空場變化大,而且目前高空西風系統波動移動快速,
帶對應地面的一周內可能會有兩次大陸高壓南下然後出海。
副高北側的中低層西風急流從華南往台灣輻散,
低層有變性高壓的回南風輻合,
因此從華南到台灣不斷有雲雨帶生長。
不過儘管,副高趴下去,但北方短時間內沒有強冷空氣南下,
因此,預報未來一周內來看,溫度不至於出現冷氣團,
不過,因為地面冷高壓一波接著一波,
回升空檔只有一兩天,接著又是東北季風報到。
東北季風在三月仍有一些影響力,
不過隨著青藏高原從冷源轉為熱源,
暖空氣流向蒙古,蒙古冷高壓無法立足
因此到了4月初,台灣就會和東北季風道別。
此後的近半年,也無緣再見到。
不過,高空系統在春天則是非常活躍,
像是副高和西風槽的角力戰,後期還有南亞高壓和西風噴流。
以及東亞梅雨季開始的高空形勢,
像是一大槽一大脊或是兩槽一脊等,都會有不同的梅雨特徵。
因此春天的高空系統變化多端,令人嘆為觀止。
反映到地面可以看到華南雲雨帶消消長長。
這些在秋天的高空場,是比不上春天的。
不過秋天的地面場,也是春天比不上的。
秋天地面場上演的東北季風大戰西南季風;以及熱帶擾動的驚奇。
也是春天難以比較的。
因此,雖然同為過渡期,大氣的反向變化,
但春秋仍各有特色。
最後再看看未來一周,
由於副高振作不夠,整體來看,冬季系統占了上風。
不過明天起的兩天空檔,由於回南風,溫度會上升較溫暖。
但預報後期東北亞高空出現較強的冷渦旋系統,
對應地面有較明顯的冷高壓南下,然後副高又趴了,只能說三月的副高還是弱。
不過冷高壓的降溫,是否又成就一波冷氣團,那是一周過後的事,需要再再觀察。
(以上供參囉)
--
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