Global warming has currently become a great concern to the international community, among which the three poles (the Arctic, Antarctic, and Qinghai-Tibet Plateau) are the most serious. In this paper, in order to improve the understanding of the matter and energy cycle in the three poles and even the world, eleven shortwave products, (namely, CERES-SYN, ERA5, MERRA-2, NCEP-CFSR, JRA-55, GLDAS, BESS_Rad, MCD18A1, ISCCP-HXG-SSR, GLASS and APP-x), and seven longwave products, (CERES-SYN, ERA5, MERRA-2, NCEP-CFSR, JRA-55, GLDAS, and APP-x) are evaluated and inter-compared in terms of accuracy. During the assessment, the ground measurements collected from four independent ground observation networks (BSRN, CEOP, TPDC, and NMC) are used as reference, and the being compared products are aggregated to the same spatial and temporal scales to make them comparable. To better examine their performance, the eleven radiation products are comprehensively compared in multiple spatial (original scale and 1°×1°) and temporal scales (1-hourly, 3-hourly, daily, and monthly means, and instantaneous). The results show that in the three poles, CERES-SYN and ERA5 show overall better accuracy, at daily, 1°×1° resolutions. The (r)bias and (r)RMSE are less than (3%)5 W/m² and (23%)40 W/m² for SWDR, and less than (3%)7 W/m² and (15%)25 W/m² for LWDR, respectively, over the polar regions (the Arctic and Antarctic), which are generally better than that of the Qinghai-Tibet Plateau for most products. The remote sensing products and reanalysis products have their own advantages and disadvantages at different regions. In addition, with the spatio-temporal resolution decreasing, the accuracy of radiation products will gradually increase, except for the products of MCD18A1, ISCCP-HXG-SSR, NCEP-CFSR and GLDAS.

当前，全球变暖已成为国际社会高度关注的问题，其中以北极、南极和青藏高原三极最为严重。本文为了提高对三极乃至世界物质能量循环的认识，提出了十一种短波产品，（即CERES-SYN、ERA5、MERRA-2、NCEP-CFSR、JRA-55、 GLDAS、BESS_Rad、MCD18A1、ISCCP-HXG-SSR、GLASS 和 APP-x）以及七种长波产品（CERES-SYN、ERA5、MERRA-2、NCEP-CFSR、JRA-55、GLDAS 和 APP-x）在准确性方面进行评估和相互比较。在评估过程中，从四个独立的地面观测网络（BSRN、CEOP、TPDC 和 NMC）收集的地面测量值用作参考，并将被比较的产品聚合到相同的时空尺度上，使其具有可比性。为更好地考察其性能，将11种辐射产品在多个空间（原始尺度和1°×1°）和时间尺度（1小时、3小时、日、月均值、瞬时）进行综合比较。结果表明，在三个极点中，CERES-SYN 和 ERA5 总体上显示出更好的精度，在每天 1°×1° 的分辨率下。(r)bias 和 (r)RMSE 小于 (3%)5 W/m 1°×1°分辨率。(r)bias 和 (r)RMSE 小于 (3%)5 W/m 1°×1°分辨率。(r)bias 和 (r)RMSE 小于 (3%)5 W/mSWDR^分别为²和 (23%)40 W/m ²，LWDR 分别低于 (3%)7 W/m ²和 (15%)25 W/m ²，在极地地区（北极和南极） )，大部分产品普遍优于青藏高原。遥感产品和再分析产品在不同地区各有优缺点。此外，随着时空分辨率的降低，除MCD18A1、ISCCP-HXG-SSR、NCEP-CFSR和GLDAS的产品外，辐射产品的精度将逐渐提高。