天氣小觀:冬季系統轉進攻擊與夏季系統推進反擊 - 颱風討論
By Caroline
at 2022-05-01T10:52
at 2022-05-01T10:52
Table of Contents
天氣小觀:冬季系統的轉進攻擊 與 夏季系統的推進反擊
春季後期的冬季系統往南方攻擊總是用轉進的方式迂迴,
轉進的方式通常是東移出海後再南下,
但,
有時會在西北大陸內陸藉由地形轉進南下,
就如同這幾天的類東北季風/溫度定義上的東北季風。
上週五南下的蒙古冷高壓無法順利抵達東亞南方,
轉往堆積在新疆盆地,再藉由甘肅走廊的地形加速噴向東亞衝出,
於是,
冷空氣噴抵東亞,順利到達長江中下游平原,
如果冷空氣噴出的速度較慢,就容易堆積在東亞冷高壓副中心(分裂中心),
而這次,噴出的速度快速,
目前直接從長江中下游平原往華南到台灣這邊過來,
由於華南地形的武夷山脈阻擋,往南冷空氣分成兩支
一支走內陸往華南,一支走沿海往台灣。
儘管迂迴,從蒙古冷高壓出現 到 轉進 轉進 再轉進南下到台灣,
換了三個中繼站(新疆、甘肅、長江中下游)才到達,
當然是因為季節已經是暖季了,不得已冬季系統才用這種轉進方式南下;
值得注意的是,
中南半島低壓擾動受西風帶牽引東移,明起東北風更強勁,冷空氣更強南下
因此明天要穿上外套啦,而等到低壓擾動遠離後,就恢復一般般冷涼空氣。
相對北方冬季系統的轉進南下,南方夏季系統就是推進的反擊了,
中南半島的低壓擾動受地形破壞無法發展為颱風,
明天又受西風帶牽引快速東移,對台灣可說是來下點雨的。
今年,
夏季系統的推進反擊是從孟加拉灣開始,
下週三以後孟加拉灣有新的氣旋會發展為熱帶氣旋,順勢帶起孟加拉灣西南季風爆發,
同時熱帶低壓波東傳,南海南部到菲律賓南部有氣旋擾動出現,
這大概需要再一週的時間,
這麼看來,
就要觀察南海五月中旬是否有季風低壓出現帶出南海西南季風爆發囉。
西南季風爆發就是夏季系風的建立,
南海西南季風最重要的任務就是清除東亞殘餘冷空氣,這點連太平洋高壓都無法做到的,
若沒有西南季風,就不會進入盛夏了;反之,因為有西南季風,夏天才會這麼長,XD
(以上供參囉)
--
春季後期的冬季系統往南方攻擊總是用轉進的方式迂迴,
轉進的方式通常是東移出海後再南下,
但,
有時會在西北大陸內陸藉由地形轉進南下,
就如同這幾天的類東北季風/溫度定義上的東北季風。
上週五南下的蒙古冷高壓無法順利抵達東亞南方,
轉往堆積在新疆盆地,再藉由甘肅走廊的地形加速噴向東亞衝出,
於是,
冷空氣噴抵東亞,順利到達長江中下游平原,
如果冷空氣噴出的速度較慢,就容易堆積在東亞冷高壓副中心(分裂中心),
而這次,噴出的速度快速,
目前直接從長江中下游平原往華南到台灣這邊過來,
由於華南地形的武夷山脈阻擋,往南冷空氣分成兩支
一支走內陸往華南,一支走沿海往台灣。
儘管迂迴,從蒙古冷高壓出現 到 轉進 轉進 再轉進南下到台灣,
換了三個中繼站(新疆、甘肅、長江中下游)才到達,
當然是因為季節已經是暖季了,不得已冬季系統才用這種轉進方式南下;
值得注意的是,
中南半島低壓擾動受西風帶牽引東移,明起東北風更強勁,冷空氣更強南下
因此明天要穿上外套啦,而等到低壓擾動遠離後,就恢復一般般冷涼空氣。
相對北方冬季系統的轉進南下,南方夏季系統就是推進的反擊了,
中南半島的低壓擾動受地形破壞無法發展為颱風,
明天又受西風帶牽引快速東移,對台灣可說是來下點雨的。
今年,
夏季系統的推進反擊是從孟加拉灣開始,
下週三以後孟加拉灣有新的氣旋會發展為熱帶氣旋,順勢帶起孟加拉灣西南季風爆發,
同時熱帶低壓波東傳,南海南部到菲律賓南部有氣旋擾動出現,
這大概需要再一週的時間,
這麼看來,
就要觀察南海五月中旬是否有季風低壓出現帶出南海西南季風爆發囉。
西南季風爆發就是夏季系風的建立,
南海西南季風最重要的任務就是清除東亞殘餘冷空氣,這點連太平洋高壓都無法做到的,
若沒有西南季風,就不會進入盛夏了;反之,因為有西南季風,夏天才會這麼長,XD
(以上供參囉)
--
Tags:
颱風
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