ERA5温度和降水数据在中国福建省的评估
Evaluation of ERA5 temperature and precipitation data in Fujian Province of China.
尽管过去20年来，再分析数据已在世界范围内得到广泛应用，但ECMWF发布的最新一代再分析ERA5尚未在小规模上进行评估。本研究采用福建省22个气象站的月度气温和月总降水量数据，验证了1979-2019年ERA5的可靠性。结果表明，ERA5在捕捉中国福建省温度和降水的时间模式方面表现良好。观测值与ERA5之间的温度相关系数范围为0.996至0.999。 所有台站的RMSE范围在0.36 C至5.49 C之间，平均为1.08 C。ERA5月最低气温、最高气温和平均气温与r2的相关性显著，范围为0.87~0.89。所有台站的相关系数范围为0.6至0.81，平均为0.7，表明ERA5的年月降水量良好。最大的RMSE是在浦城(Pucheng)站发现的625.59毫米。偏置范围为-138.8mm至529.4mm，年降水平均偏置值为148.2mm。偏差差异可能是由于ERA5网格点与观测值高度之间的高度差所致。
大气科学（气象学）
再分析ERA5气温降水偏差
高路,Amandu Dennis Tagawa.ERA5温度和降水数据在中国福建省的评估[EB/OL].(2022-03-18)[2025-09-23].http://www.paper.edu.cn/releasepaper/content/202203-247.点此复制
InAlthough reanalysis data has been widely applied over the world in the past two decades, the latest generation reanalysis, ERA5 produced by ECMWF, has not been evaluated on local scales. In this study, monthly air temperature and monthly total precipitation data from 22 meteorological stations in Fujian Province was applied to validate the reliability of ERA5 in 1979-2019. The results showed that ERA5 generally performed well in capturing temporal pattern of temperature and precipitation in Fujian Province of China. The correlation coefficient between observations and ERA5 for temperature ranged from 0.996 to 0.999. The RMSE ranged between 0.36 C and 5.49 C with an average of 1.08 C over all stations. ERA5 monthly minimum temperature, maximum temperature and mean temperatures showed the significant correlations with r2 ranged from 0.87 to 0.89. The correlation coefficient ranged from 0.6 to 0.81 with an average of 0.7 for all the stations which indicates that ERA5 captured well for annual monthly precipitation. The largest RMSE was 625.59mm found at Pucheng station. The biases ranged from -138.8mm to 529.4mm with average bias value of 148.2mm for annual precipitation. The bias difference was possible from the height differences between ERA5 grid point and height of the observation.
reanalysis ERA5 air temperature precipitation bias
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