A 0.5nm high-resolution (1h, 10km) surface solar clear-sky ultraviolet radiation dataset for China (1981-2023)

The dataset is a high-resolution surface clear-sky ultraviolet (UV) radiation dataset for mainland China, covering 43 years (1981–2023) with a temporal resolution of 1 hour and a spatial resolution of 10 km. The data is expressed in units of W/m² and is widely applicable to fields such as solar energy development, ecological research, and public health impact assessments. The dataset was generated based on the SMARTS model, using ERA5 and MERRA-2 reanalysis data as inputs. Validation against ground-based observations demonstrates its high accuracy, with a correlation coefficient (R) of 0.919, a root mean square error (RMSE) of 5.073 W/m², and a mean bias error (MBE) of 0.072 W/m². Compared to the CERES UV radiation product, this dataset demonstrates higher accuracy. Additionally, leveraging the spectral computation capabilities of the SMARTS model, the dataset provides further refinement, offering UV radiation data at 0.5 nm intervals. This enhancement enables more detailed analyses at specific wavelengths, offering higher resolution for targeted research. The dataset serves as a reliable resource for studies and applications related to clear-sky UV radiation.“UV_yyyymmdd” is the naming format for clear-sky UV radiation data, where “yyyy” represents the year, “mm” represents the month, and “dd” stands for the day.“UV_05nm_yyyymmddhh” is the naming format for clear-sky UV radiation data by wavelength, where “05nm” indicates that the data is at a 0.5nm wavelength step, ”yyyy” denotes the year, “mm” represents the month, “dd” stands for the day, and “hh” denotes the hour.If you want more complete clear-sky UV radiation data, please contact us via email (Email: [e-mail]).More data can be downloaded from:https://cjgeodata.cug.edu.cn/#/pageDetail?id=110

本数据集为中国大陆地区高分辨率地表晴空紫外（ultraviolet，UV）辐射数据集，时间覆盖1981—2023年共43年，时间分辨率为1小时，空间分辨率为10千米。数据单位为W/m²，可广泛应用于太阳能开发、生态研究及公共健康影响评估等领域。
本数据集基于SMARTS模型构建，以ERA5与MERRA-2再分析数据作为输入数据源。经地面观测数据验证，该数据集具备较高精度，相关系数（R）达0.919，均方根误差（Root Mean Square Error，RMSE）为5.073 W/m²，平均偏差误差（Mean Bias Error，MBE）为0.072 W/m²。相较于CERES紫外辐射产品，本数据集的精度表现更优。
依托SMARTS模型的光谱计算能力，本数据集还实现了进一步精细化处理，提供了间隔为0.5纳米的紫外辐射数据。该特性可支持特定波长下的精细化分析，为针对性研究提供更高分辨率的数据支撑。
本数据集可作为晴空紫外辐射相关研究与应用的可靠数据资源。
晴空紫外辐射数据的命名格式为"UV_yyyymmdd"，其中"yyyy"代表年份，"mm"代表月份，"dd"代表日期。
按波长划分的晴空紫外辐射数据命名格式为"UV_05nm_yyyymmddhh"，其中"05nm"表示数据的波长步长为0.5纳米，"yyyy"为年份，"mm"为月份，"dd"为日期，"hh"为小时。
如需获取更完整的晴空紫外辐射数据，请通过邮件联系我们（邮箱：[e-mail]）。
更多数据可通过以下链接下载：https://cjgeodata.cug.edu.cn/#/pageDetail?id=110