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Published May 10, 2023 | Supplemental Material + Published
Journal Article Open

Toward a versatile spaceborne architecture for immediate monitoring of the global methane pledge


The global methane pledge paves a fresh, critical way toward carbon neutrality. However, it remains largely invisible and highly controversial due to the fact that planet-scale and plant-level methane retrievals have rarely been coordinated. This has never been more essential within the narrow window to reach the Paris target. Here we present a two-tiered spaceborne architecture to address this issue. Using this framework, we focused on the United States, China, the Middle East, and North Africa, and simultaneously uncovered methane-abundant regions and plumes. These include new super-emitters, potential leakages, and unprecedented multiple plumes in a single source. More importantly, this framework is shown to challenge official emission reports that possibly mislead estimates from global, regional, and site scales, particularly by missing super-emitters. Our results show that, in principle, the above framework can be extended to be multi-tiered by adding upcoming stereoscopic measurements and suitable artificial intelligence, and thus it is sufficiently versatile for immediate and future monitoring of the global methane pledge.

Additional Information

© Author(s) 2023. This work is distributed under the Creative Commons Attribution 4.0 License. We thank the ESA and the S-5P/TROPOMI team for their great work initiating and realizing the TROPOMI data. We also thank the Italian Space Agency for their great work on the PRISMA data. This research has been supported by National Natural Science Foundation of China (grant nos. 22006030, 72361137007, 22076172, 21577126 and 41561144004), Science and Technology Program of Hebei Province (grant no. 22343702D), Science and Technology Project of Hebei Education Department (grant nos. BJ2020032 and QN2019184), Basic Scientific Research Foundation of Hebei (grant no. KY2021024), Initiation Fund of Hebei Agricultural University (grant nos. 412201904 and YJ201833), the Department of Science and Technology of China (grant nos. 2016YFC0202702, 2018YFC0213506 and 2018YFC0213503), and National Research Program for Key Issues in Air Pollution Control in China (grant no. DQGG0107). Review statement:This paper was edited by Eduardo Landulfo and reviewed by Karen Cady-Pereira and one anonymous referee. The supplement related to this article is available online at: https://doi.org/10.5194/acp-23-5233-2023-supplement. Author contributions: PL designed this study and wrote the manuscript. PL and YW developed the retrieval algorithm. PL, YW, XG, YH, and YP performed the data analysis. SY, AB, DR, and JHS contributed to the manuscript. The contact author has declared that none of the authors has any competing interests.

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Published - acp-23-5233-2023.pdf

Supplemental Material - acp-23-5233-2023-supplement.pdf


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August 22, 2023
October 20, 2023