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三天下了以往一年的量 鄭州氣象局:特大暴雨千年一遇!
2021-07-20 22:53
來(lái)源: @河南日報

三天下了以往一年的量 鄭州氣象局:特大暴雨千年一遇!

人工智能朗讀:

鄭州氣象局對這次特大暴雨做了一個(gè)數據的梳理和總結。鄭州20日16時(shí)~17時(shí),一個(gè)小時(shí)的降雨量達到了201.9mm。

19日20時(shí)到20日20時(shí),單日降雨量552.5mm。17日20時(shí)到20日20時(shí),三天的過(guò)程降雨量617.1mm。其中小時(shí)降水,單日降水均已突破自1951年鄭州建站以來(lái)60年的歷史記錄。

鄭州常年平均全年降雨量為640.8mm,相當于這三天下了以往一年的量。從氣候學(xué)的角度來(lái)看,小時(shí)降水、日降水的概率,重現期通過(guò)分布曲線(xiàn)擬合來(lái)看,都是超千年一遇的。

重現期在氣候學(xué)中是指在一定年代的雨量記錄資料統計期內大于或等于某暴雨強度的降雨,出現一次的平均間隔時(shí)間,為該暴雨發(fā)生頻率的重現期。

[編輯:鄭曉鵬]
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