US National Aeronautics and Space Administration (NASA) Global Modeling and Assimilation Office (GMAO) Modern-Era Retrospective analysis for Research and Applications Version 2 (MERRA-2) tavgM_2d_rad_Nx: 2-dimensional, Monthly mean, Time-Averaged, Single-Level, Assimilation, Radiation Diagnostics V5.12.4 (M2TMNXRAD), Version 5.12.4

A monthly time-averaged 2-dimensional data collection of radiation parameters is included in the Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2). It contains global model and data assimilation results that incorporate satellite-based observations to predict monthly radiation parameters, that include surface albedo, cloud area fraction, in cloud optical thickness, surface incoming shortwave flux (i.e., solar radiation), surface net downward shortwave flux, and upwelling longwave flux at top of atmosphere (i.e., outgoing longwave radiation).

现代研究与应用再分析数据集第2版（Modern-Era Retrospective analysis for Research and Applications version 2, MERRA-2）包含辐射参数的逐月时间平均二维数据集。该数据集收录了整合卫星观测数据以生成逐月辐射参数的全球模式与数据同化结果，所涵盖的辐射参数包括地表反照率（surface albedo）、云面积分数（cloud area fraction）、云内光学厚度（in cloud optical thickness）、地表入射短波通量（surface incoming shortwave flux，即太阳辐射）、地表净向下短波通量（surface net downward shortwave flux）以及大气顶向上长波通量（upwelling longwave flux at top of atmosphere，即向外长波辐射）