Assessing the consistency of <i>X</i>CO<sub>2</sub> products from DQ-1 ACDL and passive satellites using a unified comparison framework

Wang, Yike; Han, Ge; Zhang, Hongyuan; Huang, Yiyang; Zhou, Kangjie; Gong, Wei

doi:10.5194/acp-26-14793-2026

Articles | Volume 26, issue 20

https://doi.org/10.5194/acp-26-14793-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Greenhouse gas monitoring in the Asia–Pacific region...

https://doi.org/10.5194/acp-26-14793-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 20

Research article

|

21 Oct 2026

Research article |

| 21 Oct 2026

Assessing the consistency of XCO₂ products from DQ-1 ACDL and passive satellites using a unified comparison framework

Yike Wang, Ge Han, Hongyuan Zhang, Yiyang Huang, Kangjie Zhou, and Wei Gong

Supplement

https://doi.org/10.5194/acp-26-14793-2026-supplement

Data sets

OCO-2 Level 2 bias-corrected XCO2 and other select fields from the full-physics retrieval aggregated as daily files, Retrospective processing V11.2r (OCO2_L2_Lite_FP) OCO-2/OCO-3 Science Team et al. https://doi.org/10.5067/70K2B2W8MNGY

OCO-3 Level 2 bias-corrected XCO2 and other select fields from the full-physics retrieval aggregated as daily files, Retrospective processing V11r (OCO3_L2_Lite_FP) OCO-2/OCO-3 Science Team et al. https://doi.org/10.5067/8U0VGVQC7HZG

CAMS global inversion-optimised greenhouse gas fluxes and concentrations Copernicus Atmosphere Monitoring Service https://doi.org/10.24381/ed2851d2

ERA5 hourly data on single levels from 1940 to present Copernicus Climate Change Service https://doi.org/10.24381/cds.adbb2d47

MODIS/Aqua Surface Reflectance Daily L3 Global 0.05Deg CMG V061 E. Vermote https://doi.org/10.5067/MODIS/MYD09CMG.061

2020 TCCON Data Release D. Wunch et al. https://doi.org/10.14291/TCCON.GGG2020

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Short summary

This study establishes a unified framework to assess the consistency of DQ-1 (Da Qi-1) ACDL (Aerosol and Carbon Dioxide Lidar) XCO₂ with passive satellite products while considering sampling and column-definition differences. DQ-1 agrees well with TCCON (Total Carbon Column Observing Network) and shows consistent spatial patterns with OCO-2, OCO-3 (Orbiting Carbon Observatory), GOSAT, and GOSAT-2 (Greenhouse gases Observing SATellite) over selected regions. It provides complementary XCO₂ observations where passive measurements are limited, including nighttime and high latitudes, supporting future joint carbon monitoring and inversion studies.

Assessing the consistency of XCO2 products from DQ-1 ACDL and passive satellites using a unified comparison framework

Supplement

Data sets

Assessing the consistency of XCO₂ products from DQ-1 ACDL and passive satellites using a unified comparison framework