天氣小觀:一周後,西風長槽出現,太平洋高壓減弱 - 颱風討論

By Carolina Franco
at 2015-06-11T11:09
at 2015-06-11T11:09
Table of Contents
天氣小觀:一周後,西風長波槽出現,太平洋高壓減弱
以下簡單說明:
目前東北亞地區有一股明顯的高空冷渦旋勢力,並且向下影響到地面加強對流,
產生地面低壓發展,由於這季節冷熱對流較強,降雨強並且釋放潛熱,
有點類似熱帶低壓的初始機制,
不過水氣不夠,也不是熱帶海洋上,無法轉性為熱帶低壓,
於是這個有趣的溫帶帶一點熱帶低機制的大低壓,預報從發展到消散大概三天
但也能讓台灣有一點天氣變化。
雖然在高空仍是太平洋高壓勢力守住,
但是東北地面大低壓的西側,西北風強勁,讓梅雨鋒面往台灣接近。
增加一點大氣的不穩定度。
不過由於南海太平洋高壓比較強,
因此西南風還是受到抑制,模式預報,降雨還是很局部
但是一周後,情況就有另一波變化,
因為受到蒙古暖脊發展,東北亞有較深西風槽,
由西風短槽疊加成西風長波槽對抗太平洋高壓,
使太平洋高壓減弱東退,梅雨鋒面往南接近台灣,
是否會壓到台灣,還要再觀察。
不過面對夏季系統強大的熱浪勢力,
想要壓到台灣冬季系要很拚了。
(以上供參囉)
--
以下簡單說明:
目前東北亞地區有一股明顯的高空冷渦旋勢力,並且向下影響到地面加強對流,
產生地面低壓發展,由於這季節冷熱對流較強,降雨強並且釋放潛熱,
有點類似熱帶低壓的初始機制,
不過水氣不夠,也不是熱帶海洋上,無法轉性為熱帶低壓,
於是這個有趣的溫帶帶一點熱帶低機制的大低壓,預報從發展到消散大概三天
但也能讓台灣有一點天氣變化。
雖然在高空仍是太平洋高壓勢力守住,
但是東北地面大低壓的西側,西北風強勁,讓梅雨鋒面往台灣接近。
增加一點大氣的不穩定度。
不過由於南海太平洋高壓比較強,
因此西南風還是受到抑制,模式預報,降雨還是很局部
但是一周後,情況就有另一波變化,
因為受到蒙古暖脊發展,東北亞有較深西風槽,
由西風短槽疊加成西風長波槽對抗太平洋高壓,
使太平洋高壓減弱東退,梅雨鋒面往南接近台灣,
是否會壓到台灣,還要再觀察。
不過面對夏季系統強大的熱浪勢力,
想要壓到台灣冬季系要很拚了。
(以上供參囉)
--
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