天氣小觀:晚上鋒面,南亞高壓誕生,太平洋高壓西移 - 颱風討論
By Quanna
at 2023-04-29T08:03
at 2023-04-29T08:03
Table of Contents
天氣小觀:晚上鋒面,南亞高壓誕生,太平洋高壓西移
未來一週蠻多事,首先是鋒面今晚接近,
從雲貴高原東移到華中的冷高壓持續往東,鋒面跟著接近台灣,
晚上報到跟著北部和東北部降雨,
這次鋒面通過的高空系統主要就是西風槽和太平洋高壓的摩擦,
由於華中冷高壓的抑制,因此沒有南支槽的影子。
值得注意的是,南亞高壓過誕生,下週吸引太平洋高壓往西移,
影響三大件事,
首先是南支槽無法東移,再來一週後期台灣炎熱要衝30度了!
最後是不利印度洋北部的赤道渦旋順利往北移,
因此今年孟加拉灣的西南季風爆發確定會比起往年稍慢
儘管如此,
印度洋北部的赤道渦旋會在孟加拉灣南部發展出熱帶氣旋,
熱帶氣旋的TD波動對太平洋高壓產生擠壓,
就等熱帶氣旋往北,帶起孟加拉灣西南季風全面爆發。
事實上,孟加拉灣或阿拉伯海的西南季風爆發都與南海不同,
孟加拉灣/阿拉伯海的西南季風爆發從南部開始,
南海的西南季風爆發通常先從南海北部開始(東亞活躍鋒面-中緯度系統誘發),
此外,
孟加拉灣南部至全區的西南季風爆發,往往要等一段時間,甚至數週,
但南海一旦西南季風爆發,無論從哪裡開始,一週內就會擴及全區西南季風爆發。
原因在於,南海西南季風爆發主要是看副高臉色,
而四月的太平洋高壓常常連結南亞副高,
因此先要有印度洋北部的赤道渦旋北移,對兩方高壓的連結產生壓力,
再來就是孟加拉灣的熱帶低壓TD波動東傳,發信號通知太平洋高壓東退。
南海西南季風爆發序,模式看來,
1. 潛熱加熱/南亞高壓:DONE!
2. 印度洋近赤道渦旋北移:模式預報,下週
3. 南亞-南海副高斷裂:長期模式,5月第2週
4. 孟加拉灣熱帶波動東傳:長期模式,5月第2週
5. 太平洋高壓東退:等
6. 南海西南季風爆發:等
(以上供等等等)
--
未來一週蠻多事,首先是鋒面今晚接近,
從雲貴高原東移到華中的冷高壓持續往東,鋒面跟著接近台灣,
晚上報到跟著北部和東北部降雨,
這次鋒面通過的高空系統主要就是西風槽和太平洋高壓的摩擦,
由於華中冷高壓的抑制,因此沒有南支槽的影子。
值得注意的是,南亞高壓過誕生,下週吸引太平洋高壓往西移,
影響三大件事,
首先是南支槽無法東移,再來一週後期台灣炎熱要衝30度了!
最後是不利印度洋北部的赤道渦旋順利往北移,
因此今年孟加拉灣的西南季風爆發確定會比起往年稍慢
儘管如此,
印度洋北部的赤道渦旋會在孟加拉灣南部發展出熱帶氣旋,
熱帶氣旋的TD波動對太平洋高壓產生擠壓,
就等熱帶氣旋往北,帶起孟加拉灣西南季風全面爆發。
事實上,孟加拉灣或阿拉伯海的西南季風爆發都與南海不同,
孟加拉灣/阿拉伯海的西南季風爆發從南部開始,
南海的西南季風爆發通常先從南海北部開始(東亞活躍鋒面-中緯度系統誘發),
此外,
孟加拉灣南部至全區的西南季風爆發,往往要等一段時間,甚至數週,
但南海一旦西南季風爆發,無論從哪裡開始,一週內就會擴及全區西南季風爆發。
原因在於,南海西南季風爆發主要是看副高臉色,
而四月的太平洋高壓常常連結南亞副高,
因此先要有印度洋北部的赤道渦旋北移,對兩方高壓的連結產生壓力,
再來就是孟加拉灣的熱帶低壓TD波動東傳,發信號通知太平洋高壓東退。
南海西南季風爆發序,模式看來,
1. 潛熱加熱/南亞高壓:DONE!
2. 印度洋近赤道渦旋北移:模式預報,下週
3. 南亞-南海副高斷裂:長期模式,5月第2週
4. 孟加拉灣熱帶波動東傳:長期模式,5月第2週
5. 太平洋高壓東退:等
6. 南海西南季風爆發:等
(以上供等等等)
--
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