Fig. 1. Geographical location and functional divisions of Beijing

Fig. 2. Spatial distribution of valid data quantity of XCO₂ products GOSAT，OCO-2，GOSAT-2 and OCO-3 satellite over Beijing in 2020

Fig. 3. Flow chart of 100 m full-coverage gridded XCO₂ reconstruction method

Fig. 4. Comparison of 100 m full-coverage grided XCO₂ reconstruction results of 4 sets of satellite XCO₂ data in 2020 with Xianghe in-situ measurements and CarbonTracker model simulations

Fig. 5. Annual average spatial distribution of 100 m gridded full-coverage XCO₂ reconstruction results in Beijing area in 2020

Fig. 6. Spatial distribution of 100 m gridded full-coverage XCO₂ reconstruction results in the four seasons over Beijing in 2020

Fig. 7. Time change of monthly average value of 100 m gridded full-coverage XCO₂ reconstruction results in Beijing area in 2020