Rapid Methane Flux Estimation Combining MethaneSAT and Sentinel‐5P Observations: A Case Study of Turkmenistan
Abstract Rapid estimation of high‐resolution (∼km), regional‐scale (∼10 4 km 2 ) CH 4 fluxes plays a critical role in supporting the Global Methane Pledge and guiding targeted mitigation strategies. This study presents a novel method that combines XCH 4 observations from MethaneSAT and Sentinel‐5P to directly estimate CH 4 fluxes without relying on chemical transport models (CTMs). We retrieved 5 km‐resolution CH 4 fluxes over western and eastern Turkmenistan, with total emissions of 389.3 ± 76.8 t/hr and 168.5 ± 33.8 t/hr, respectively. These estimates agree within ∼13% of standard atmospheric inversions but exceed GFEI and EDGAR inventories by nearly 100%, highlighting the critical role of satellite remote sensing in independently verifying regional‐ to national‐scale CH 4 emissions. This approach offers a new pathway for rapidly inferring kilometer‐scale greenhouse gas fluxes from regional, high‐resolution satellite observations such as MethaneSAT, CO2M, and TanSat‐2.
Authors
- Tianqi Shi (ORCID: https://orcid.org/0000-0003-4815-4175)
- Siwei Li (ORCID: https://orcid.org/0009-0006-1790-6265)
- Haotian Luo
- Ge Han (ORCID: https://orcid.org/0000-0003-2561-3244)
- Feiyue Mao (ORCID: https://orcid.org/0000-0002-7246-0036)
- Yichi Zhang (ORCID: https://orcid.org/0000-0002-6990-8055)
- Wei Gong (ORCID: https://orcid.org/0000-0003-1510-6089)
- Yiyang Huang (ORCID: https://orcid.org/0009-0008-9362-1725)
- Jinchun Yi (ORCID: https://orcid.org/0009-0004-5034-3594)
- Huiqin Mao
Institutions
- Centre National de la Recherche Scientifique (FR)
- Université de Versailles Saint-Quentin-en-Yvelines (FR)
- Ministry of Ecology and Environment (CN)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Wuhan University (CN)
- State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing (CN)
- Laboratoire des Sciences du Climat et de l'Environnement (FR)
- CEA Paris-Saclay (FR)
- Satellite Application Center for Ecology and Environment (CN)
- Nano Carbon (Poland) (PL)
- Wuhan Institute of Technology (CN)
Publication Details
- Journal
- Geophysical Research Letters
- Published
- 2025-11-02
- DOI
- https://doi.org/10.1029/2025gl119369
- Citations
- 1
- Primary Topic
- Atmospheric and Environmental Gas Dynamics
- Type
- article
- Field-Weighted Citation Impact
- 1.11