原文：http://bbs.06climate.com/home.php?mod=space&uid=123371&do=blog&id=6943

在500 hPa以上的层次上，ERA5的相对湿度数据可以超过100%。这可能是由于在低温下对冰的过饱和。相关页面https://confluence.ecmwf.int/pages/viewpage.action?pageId=158637676

ERA5 relative humidity data on pressure levels above 500 hPa can exceeds 100%. This could be due to supersaturation with respect to ice at cold temperatures.