Characteristics of interannual variability in space-based XCO<sub>2</sub> global observations

Guan, Yifan; Keppel-Aleks, Gretchen; Doney, Scott C.; Petri, Christof; Pollard, Dave; Wunch, Debra; Hase, Frank; Ohyama, Hirofumi; Morino, Isamu; Notholt, Justus; Shiomi, Kei; Strong, Kim; Kivi, Rigel; Buschmann, Matthias; Deutscher, Nicholas; Wennberg, Paul; Sussmann, Ralf; Velazco, Voltaire A.; Té, Yao

doi:https://doi.org/10.5194/acp-23-5355-2023

Articles | Volume 23, issue 9

https://doi.org/10.5194/acp-23-5355-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-23-5355-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 9

Research article

|

12 May 2023

Research article |

| 12 May 2023

Characteristics of interannual variability in space-based XCO₂ global observations

Yifan Guan, Gretchen Keppel-Aleks, Scott C. Doney, Christof Petri, Dave Pollard, Debra Wunch, Frank Hase, Hirofumi Ohyama, Isamu Morino, Justus Notholt, Kei Shiomi, Kim Strong, Rigel Kivi, Matthias Buschmann, Nicholas Deutscher, Paul Wennberg, Ralf Sussmann, Voltaire A. Velazco, and Yao Té

Supplement

https://doi.org/10.5194/acp-23-5355-2023-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 V10r (OCO2_L2_Lite_FP 10r) GES DISC https://disc.gsfc.nasa.gov/datasets/OCO2_L2_Lite_FP_10r/summary?keywords=OCO-2

2014 TCCON Data Release (GGG2014) Total Carbon Column Observing Network (TCCON) Team https://doi.org/10.14291/TCCON.GGG2014

NOAA Global Greenhouse Gas Reference Network Continuous Insitu Measurements of CO2, CH4, and CO at Global Background Sites, 1973-Present NOAA GML CCGG Group https://doi.org/10.15138/YAF1-BK21

Data products distributed from GOSAT DHF Japan Aerospace Exploration Agency (JAXA), National Institute for Environmental Studies (NIES) and Ministry of the Environment (MOE) https://www.gosat.nies.go.jp/en/about_5_products.html

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Short summary

We characterize spatial–temporal patterns of interannual variability (IAV) in atmospheric CO₂ based on NASA’s Orbiting Carbon Observatory-2 (OCO-2). CO₂ variation is strongly impacted by climate events, with higher anomalies during El Nino years. We show high correlation in IAV between space-based and ground-based CO₂ from long-term sites. Because OCO-2 has near-global coverage, our paper provides a roadmap to study IAV where in situ observation is sparse, such as open oceans and remote lands.

Characteristics of interannual variability in space-based XCO2 global observations

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Data sets

Characteristics of interannual variability in space-based XCO₂ global observations