PM_2.5 Dataset

We integrated the FY-4A and FY-4B TOA reflectance to generate high-coverage hourly daytime PM_2.5concentrations over China. Using a spatiotemporal interpolation method to impute missing values, we derived spatially and temporally continuous daily PM2.5 concentration datasets.

本研究整合风云四号A星（FY-4A）与风云四号B星（FY-4B）的大气顶反射率（TOA Reflectance）数据，生成了中国区域内高覆盖度的逐时日间细颗粒物（PM₂.₅）浓度数据。随后采用时空插值方法对缺失值进行插补，得到了时空连续的逐日PM₂.₅浓度数据集。