由 武, 聪聪 ERA5-SH：基于ERA5再分析资料的全球对流层参数尺度高度网格数据集
引文格式 | Citation:
HAO R, YANG F, LI Z, et al. ERA5-SH: A global grided scale height dataset for tropospheric parameters based on ERA5 reanalysis[J]. Scientific Data, 2025, 12(1): 381. DOI:10.1038/s41597-025-04714-5.
Scientific Data（中科院2区，IF：6.9）
ERA5
ZTD
ZWD
PWV
WVD
ZHD
Tm
ZTD
ZWD
PWV
WVD
ZHD
Tm
Abstract | 摘要
The scale height (SH) represents the height increment for a certain parameter to decrease to 36.7% (1/e) of its value at a certain height. Here we present ERA5-SH, a gridded dataset containing the SH values of six troposphere key parameters (PWV, WVD, Tm, ZTD, ZHD and ZWD) based on ERA5 reanalysis from 2013 to 2022, with a temporal resolution of 1 hour and a spatial resolution of 1°. The dataset was generated using numerical integral and exponential fitting, and exhibits high reliability with mean coefficients of determination being 0.991, 0.957, 0.980, 0.999, 0.999, and 0.995, respectively. Using the global distributed radiosonde sites as references, the mean RMSE for the six parameters were 0.243 km, 0.189 km, 3.290 km, 0.879 km, 0.681 km, and 0.263 km, respectively. This dataset will contribute to a deeper understanding of the tropospheric vertical distribution and to improve the accuracy of atmospheric delay modeling, which are vital for the advancement of the Earth observation technologies with high precision.
尺度高度（SH）表征了某参数值从某一高度下降至其36.7%（1/e）时对应的高度增量。本研究基于2013–2022年ERA5再分析资料，推出了空间分辨率为1°、时间分辨率为1小时的格点化数据集ERA5-SH，包含六种对流层关键参数（PWV、WVD、Tm、ZTD、ZHD与ZWD）的SH值。该数据集通过数值积分与指数拟合方法生成，其可靠性显著：各参数SH值的平均决定系数分别为0.991、0.957、0.980、0.999、0.999和0.995。以全球分布的无线电探空站点为参考，六类参数SH值的平均均方根误差分别为0.243 km、0.189 km、3.290 km、0.879 km、0.681 km和0.263 km。本数据集将有助于深化对对流层垂直分布特征的理解，提升大气延迟建模的精度，对推动高精度地球观测技术的发展具有重要意义。