相对湿度

climate777 · 发表于 2022-4-27 21:44:35

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为啥ncep era5这些再分析资料算出来的RH都大于100%了呢，非常迷惑~望大佬解答~

edwardli · 发表于 2022-4-30 23:55:36

ERA5 relative humidity dataon pressure levels above 500 hPa can exceeds 100%. This could be due to supersaturation with respect to ice at cold temperatures.This parameter is the water vapour pressure as a percentage of the value at which the air becomes saturated (the point at which water vapour begins to condense into liquid water or deposition into ice). For temperatures over 0°C (273.15 K) it is calculated for saturation over water. At temperatures below -23°C it is calculated for saturation over ice. Between -23°C and 0°C this parameter is calculated by interpolating between the ice and water values using a quadratic function.

climate777 · 发表于 2022-5-2 14:22:12

学到了，非常感谢~

wcyycw · 发表于 2022-5-23 08:33:36

climate777 发表于 2022-5-2 14:22
学到了，非常感谢~

但是下载的是1000~800 hPa的值也有超过100的呢

cmh201128 · 发表于 2023-11-4 20:30:05

wcyycw 发表于 2022-5-23 08:33
但是下载的是1000~800 hPa的值也有超过100的呢

请问你解决了吗？我也遇到了这个问题，是把小于0 的换成0 ，大于100的换成100吗？

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