A yearly gapless 1 km resolution XCO₂ dataset for China

This is the yearly gapless column-averaged CO₂ dry air mole fractions (XCO₂) dataset in China from 2012 to 2019. Due to the satellite revisit period and the limitation of sampling window, the continuous XCO₂ data in space is mostly coarse. Long-term data with high spatial resolution (e.g., 1 × 1 km/ yearly) on CO₂ concentration are always unavailable. We proposed a novel model from the perspective of spatial heterogeneity to reconstruct a fine-resolution (1 km ×1 km) XCO₂ data in China from year of 2012 to 2019 based on the existing Global 1° land mapping XCO₂.本数据集为2012至2019年中国区域逐年无间隙柱平均干空气二氧化碳摩尔分数（XCO₂）数据集。受卫星重访周期与采样窗口限制，空间连续的XCO₂数据大多分辨率粗糙，长期、高空间分辨率（如1×1 km/年）的二氧化碳浓度数据始终难以获取。本研究基于现有全球1°陆地制图XCO₂数据，从空间异质性视角提出新型模型，成功重构得到2012至2019年中国区域1 km×1 km分辨率的精细化XCO₂数据。