Decreasing methane emissions from China's coal mining with rebounded coal production

被引：26

作者：

Gao, Junlian ^{[1
]}

Guan, Chenghe ^{[2
]}

Zhang, Bo ^{[1
,3
]}

Li, Ke ^{[4
]}

机构：

[1] China Univ Min & Technol Beijing, Sch Management, Beijing 100083, Peoples R China

[2] New York Univ Shanghai, Shanghai 200122, Peoples R China

[3] China Univ Min & Technol Beijing, State Key Lab Coal Resources & Safe Min, Beijing 100083, Peoples R China

[4] Nanjing Univ Informat Sci & Technol, Jiangsu Key Lab Atmospher Environm Monitoring & P, Jiangsu Collaborat Innovat Ctr Atmospher Environm, Sch Environm Sci & Engn, Nanjing, Jiangsu, Peoples R China

来源：

ENVIRONMENTAL RESEARCH LETTERS | 2021年 / 16卷 / 12期

基金：

中国国家自然科学基金;

关键词：

methane emissions; coal mining; emission factors; bottom-up inventories; China; FUGITIVE METHANE; INVENTORY; BUDGET; METHODOLOGY; MINES;

D O I：

10.1088/1748-9326/ac38d8

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

China is the world's largest anthropogenic methane (CH4) emitter, with coal mine methane (CMM) as one of the main contributors. However, previous studies have not reach consensus on the magnitude and trend of China's CMM emissions since 2010. Through distribution fitting and Monte Carlo methods, dynamic emission factors (EFs) of CMM at the province-level were derived with high confidence; along with the updated data on surface mining, abandoned coal mines, and methane utilization, we revealed that China's annual CMM emissions were estimated at 20.11 Tg between 2010 and 2019 with a decline of 0.93 Tg yr(-1). Although coal production was revived in 2017, we found that the growing trend of China's CMM emissions since 2012 were curbed by the previously-overlooked factors including the growth of CMM utilization and coal production from surface mining, and decrease of EFs driven by the closure of high CH4-content coal mines and a regional production shift to lower-emission areas.

引用

页数：10

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