雨雪判別-冰點以上最高幾度仍會降雪 - 颱風討論

By Candice
at 2016-01-22T20:03
at 2016-01-22T20:03
Table of Contents
究竟零度以上會不會降雪
冰點以上最高以上仍然是可能發生降雪的環境
相信這一定是不少人會有的疑問
趁著周末超級寒流即將來臨的時刻
剛剛在逛日本氣象庁發現一張不錯的的對照圖
http://imgur.com/K6OtvVX
結論是和濕度有很大的關係
如果是在濕度很高的情況下(90%以上)
一定要降到冰點以下才會降雪
如果濕度只有80%
冰點以上0-2度間都可能會發生降雪
溫度如果達2-4度的話會下みぞれ(mizore)
日文的みぞれ漢字寫做"霙"
就日本氣象庁的定義
みぞれ也是雪的一種
所以之前1977年在沖繩久米島其實下的是みぞれ
但是日本也是承認是正式下雪的紀錄
簡單來說みぞれ比較像是雨夾雪
一般為透明球狀之固體顆粒
常常發生在由於雨滴結凍,或因大部份已融化之雪片降落
經地面附近溫度在攝氏零度以下之氣層而再結凍之降水成為霙(sleet)
如果濕度只有50%的話
可能溫度雖然還有6度都有可能降雪
不過實際上似乎比較難發生
畢竟會發生下雪就像下雨一樣
周遭環境的濕度應該不會太低
尤其是在海島國家濕度這麼低又同時下雨/雪的機會似乎比較低
供參考~
--
冰點以上最高以上仍然是可能發生降雪的環境
相信這一定是不少人會有的疑問
趁著周末超級寒流即將來臨的時刻
剛剛在逛日本氣象庁發現一張不錯的的對照圖
http://imgur.com/K6OtvVX
結論是和濕度有很大的關係
如果是在濕度很高的情況下(90%以上)
一定要降到冰點以下才會降雪
如果濕度只有80%
冰點以上0-2度間都可能會發生降雪
溫度如果達2-4度的話會下みぞれ(mizore)
日文的みぞれ漢字寫做"霙"
就日本氣象庁的定義
みぞれ也是雪的一種
所以之前1977年在沖繩久米島其實下的是みぞれ
但是日本也是承認是正式下雪的紀錄
簡單來說みぞれ比較像是雨夾雪
一般為透明球狀之固體顆粒
常常發生在由於雨滴結凍,或因大部份已融化之雪片降落
經地面附近溫度在攝氏零度以下之氣層而再結凍之降水成為霙(sleet)
如果濕度只有50%的話
可能溫度雖然還有6度都有可能降雪
不過實際上似乎比較難發生
畢竟會發生下雪就像下雨一樣
周遭環境的濕度應該不會太低
尤其是在海島國家濕度這麼低又同時下雨/雪的機會似乎比較低
供參考~
--
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