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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.
See the ERA5 IFS documentation (CY41R2), Part IV Physical processes, Chapter 7- Clouds and large-scale precipitation, for more information:
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