A new merged dataset for analyzing clouds, precipitation and atmospheric parameters based on ERA5 reanalysis data and the measurements of TRMM PR and VIRS

This new merged gridded dataset (M-1B01-2A25-GD) contains precipitation, clouds and atmospheric parameters with  0.25° spatial resolution.

It is produced by merging TRMM PR and VIRS measurements with the ERA5 reanalysis dataset at the same spatiotemporal resolution between 40° S and 40° N. The near-surface rain rate, profiles of rain rate and precipitation reflectivity factor, visible and infrared signals and atmospheric parameters (temperature, pressure, geopotential height, specific humidity, divergence, vertical velocity and so on) can be obtained in the dataset. The statistical results indicate that the merging and gridding will not dramatically distort the original data and the new dataset can be used to study the characteristics and distribution of the precipitation and clouds systems.

本新型融合网格化数据集（M-1B01-2A25-GD）涵盖降水、云系与大气参数，空间分辨率达0.25°。
该数据集通过在南纬40°至北纬40°区间内，将TRMM PR、VIRS观测数据与ERA5再分析数据集以相同时空分辨率融合构建而成。数据集可提取近地表降雨率、降雨率廓线、降水反射率因子、可见光与红外信号，以及气温、气压、位势高度、比湿、散度、垂直速度等各类大气参数。
统计分析结果表明，融合与网格化处理未对原始数据造成显著畸变，该全新数据集可用于研究降水与云系的特征及分布规律。