Column-Weighted Carbon Dioxide Concentration Under the Cloud Using Spaceborne IPDA Lidar
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In 2022, China launched the world’s first satellite for active lidar CO<sub>2</sub> detection, the Atmospheric Environmental Monitoring Satellite (AEMS, or DQ-1). Its key payload, the Aerosol and Carbon Detection LiDAR (ACDL), provides high-precision CO<sub>2</sub> column concentration (XCO<sub>2</sub>) measurements. The system can treat optically thick clouds as hard targets while penetrating thin clouds, enabling separation of above-cloud and whole-column CO<sub>2</sub> signals for below-cloud XCO<sub>2</sub> retrievals. XCO<sub>2</sub> retrievals under the cloud better represent near-surface CO<sub>2</sub> concentrations.
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figshare创建时间：
2025-12-09
