Homogeneous daily solar (GLOBAL) radiation data for station Warszawa (Poland) for the period 1991-2015

Ground-based measurements of global solar radiation are often subject to various errors which are very difficult to detect. This is why quality control procedures and homogenisation of data are essential and should be performed prior to further analyses. We present homogeneous global solar radiation data set, without any gaps, for 16 ground-based stations located in Poland for the period 1991-2015. The data set was prepared with a modification of bias-based quality control (BQC) method (developed by Urraca, and presented in 2017), tailored specially for detecting single erroneous daily values (mostly caused by a failure of the measuring equipment), and very long periods of small errors (mostly caused by a miscalibration of the measuring equipment). The values on the days considered as erroneous were replaced with debiased SIS SARAH-2 values. In many situations the data were visually checked to make sure that the prepared set constitutes the best possible climatology of actinometric data in Poland.全球总辐射的地面观测值常受各类难以检出的误差影响。正因如此，质量控制流程与数据均一化处理至关重要，且需在后续分析前完成。本研究提供1991—2015年间波兰境内16个地面观测站的无缺测均一化全球总辐射数据集。该数据集基于经改进的基于偏差的质量控制（bias-based quality control, BQC）方法构建，该方法由Urraca于2017年提出，专门用于识别单日异常值（多由测量设备故障引发）以及持续较长时段的小幅误差（多由测量设备校准失当引发）。被判定为异常的日期的观测值，已替换为经过偏差校正的SIS SARAH-2数据。本数据集还经过多轮人工目视校验，以确保所构建的数据集能够反映波兰辐射学观测数据最优的气候学特征。