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