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Observed changes in China’s methane emissions linked to policy drivers

China is set to actively reduce its methane emissions in the coming decade. A comprehensive evaluation of the current situation can provide a reference point for tracking the country’s future progress. Here, using satellite and surface observations, we quantify China’s methane emissions during 2010–...

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Autores principales: Zhang, Yuzhong, Fang, Shuangxi, Chen, Jianmeng, Lin, Yi, Chen, Yuanyuan, Liang, Ruosi, Jiang, Ke, Parker, Robert J., Boesch, Hartmut, Steinbacher, Martin, Sheng, Jian-Xiong, Lu, Xiao, Song, Shaojie, Peng, Shushi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: National Academy of Sciences 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9564322/
https://www.ncbi.nlm.nih.gov/pubmed/36191196
http://dx.doi.org/10.1073/pnas.2202742119
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author Zhang, Yuzhong
Fang, Shuangxi
Chen, Jianmeng
Lin, Yi
Chen, Yuanyuan
Liang, Ruosi
Jiang, Ke
Parker, Robert J.
Boesch, Hartmut
Steinbacher, Martin
Sheng, Jian-Xiong
Lu, Xiao
Song, Shaojie
Peng, Shushi
author_facet Zhang, Yuzhong
Fang, Shuangxi
Chen, Jianmeng
Lin, Yi
Chen, Yuanyuan
Liang, Ruosi
Jiang, Ke
Parker, Robert J.
Boesch, Hartmut
Steinbacher, Martin
Sheng, Jian-Xiong
Lu, Xiao
Song, Shaojie
Peng, Shushi
author_sort Zhang, Yuzhong
collection PubMed
description China is set to actively reduce its methane emissions in the coming decade. A comprehensive evaluation of the current situation can provide a reference point for tracking the country’s future progress. Here, using satellite and surface observations, we quantify China’s methane emissions during 2010–2017. Including newly available data from a surface network across China greatly improves our ability to constrain emissions at subnational and sectoral levels. Our results show that recent changes in China’s methane emissions are linked to energy, agricultural, and environmental policies. We find contrasting methane emission trends in different regions attributed to coal mining, reflecting region-dependent responses to China’s energy policy of closing small coal mines (decreases in Southwest) and consolidating large coal mines (increases in North). Coordinated production of coalbed methane and coal in southern Shanxi effectively decreases methane emissions, despite increased coal production there. We also detect unexpected increases from rice cultivation over East and Central China, which is contributed by enhanced rates of crop-residue application, a factor not accounted for in current inventories. Our work identifies policy drivers of recent changes in China’s methane emissions, providing input to formulating methane policy toward its climate goal.
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spelling pubmed-95643222022-10-15 Observed changes in China’s methane emissions linked to policy drivers Zhang, Yuzhong Fang, Shuangxi Chen, Jianmeng Lin, Yi Chen, Yuanyuan Liang, Ruosi Jiang, Ke Parker, Robert J. Boesch, Hartmut Steinbacher, Martin Sheng, Jian-Xiong Lu, Xiao Song, Shaojie Peng, Shushi Proc Natl Acad Sci U S A Physical Sciences China is set to actively reduce its methane emissions in the coming decade. A comprehensive evaluation of the current situation can provide a reference point for tracking the country’s future progress. Here, using satellite and surface observations, we quantify China’s methane emissions during 2010–2017. Including newly available data from a surface network across China greatly improves our ability to constrain emissions at subnational and sectoral levels. Our results show that recent changes in China’s methane emissions are linked to energy, agricultural, and environmental policies. We find contrasting methane emission trends in different regions attributed to coal mining, reflecting region-dependent responses to China’s energy policy of closing small coal mines (decreases in Southwest) and consolidating large coal mines (increases in North). Coordinated production of coalbed methane and coal in southern Shanxi effectively decreases methane emissions, despite increased coal production there. We also detect unexpected increases from rice cultivation over East and Central China, which is contributed by enhanced rates of crop-residue application, a factor not accounted for in current inventories. Our work identifies policy drivers of recent changes in China’s methane emissions, providing input to formulating methane policy toward its climate goal. National Academy of Sciences 2022-10-03 2022-10-11 /pmc/articles/PMC9564322/ /pubmed/36191196 http://dx.doi.org/10.1073/pnas.2202742119 Text en Copyright © 2022 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by/4.0/This open access article is distributed under Creative Commons Attribution License 4.0 (CC BY) (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Physical Sciences
Zhang, Yuzhong
Fang, Shuangxi
Chen, Jianmeng
Lin, Yi
Chen, Yuanyuan
Liang, Ruosi
Jiang, Ke
Parker, Robert J.
Boesch, Hartmut
Steinbacher, Martin
Sheng, Jian-Xiong
Lu, Xiao
Song, Shaojie
Peng, Shushi
Observed changes in China’s methane emissions linked to policy drivers
title Observed changes in China’s methane emissions linked to policy drivers
title_full Observed changes in China’s methane emissions linked to policy drivers
title_fullStr Observed changes in China’s methane emissions linked to policy drivers
title_full_unstemmed Observed changes in China’s methane emissions linked to policy drivers
title_short Observed changes in China’s methane emissions linked to policy drivers
title_sort observed changes in china’s methane emissions linked to policy drivers
topic Physical Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9564322/
https://www.ncbi.nlm.nih.gov/pubmed/36191196
http://dx.doi.org/10.1073/pnas.2202742119
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