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| DOI | 10.1038/s41586-022-05447-w |
| Wetland emission and atmospheric sink changes explain methane growth in 2020 | |
| Peng, Shushi; Lin, Xin; Thompson, Rona L.; Xi, Yi; Liu, Gang; Hauglustaine, Didier; Lan, Xin; Poulter, Benjamin; Ramonet, Michel; Saunois, Marielle; Yin, Yi; Zhang, Zhen; Zheng, Bo; Ciais, Philippe | |
| 发表日期 | 2022 |
| ISSN | 0028-0836 |
| EISSN | 1476-4687 |
| 起始页码 | 477 |
| 结束页码 | + |
| 卷号 | 612期号:7940 |
| 英文摘要 | Atmospheric methane growth reached an exceptionally high rate of 15.1 +/- 0.4 parts per billion per year in 2020 despite a probable decrease in anthropogenic methane emissions during COVID-19 lockdowns(1). Here we quantify changes in methane sources and in its atmospheric sink in 2020 compared with 2019. We find that, globally, total anthropogenic emissions decreased by 1.2 +/- 0.1 teragrams of methane per year (Tg CH(4)yr(-1)), fire emissions decreased by 6.5 +/- 0.1 Tg CH(4)yr(-1) and wetland emissions increased by 6.0 +/- 2.3 Tg CH(4)yr(-1). Tropospheric OH concentration decreased by 1.6 +/- 0.2 per cent relative to 2019, mainly as a result of lower anthropogenic nitrogen oxide (NOx) emissions and associated lower free tropospheric ozone during pandemic lockdowns(2). From atmospheric inversions, we also infer that global net emissions increased by 6.9 +/- 2.1 Tg CH(4)yr(-1) in 2020 relative to 2019, and global methane removal from reaction with OH decreased by 7.5 +/- 0.8 Tg CH(4)yr(-1). Therefore, we attribute the methane growth rate anomaly in 2020 relative to 2019 to lower OH sink (53 +/- 10 per cent) and higher natural emissions (47 +/- 16 per cent), mostly from wetlands. In line with previous findings(3,4), our results imply that wetland methane emissions are sensitive to a warmer and wetter climate and could act as a positive feedback mechanism in the future. Our study also suggests that nitrogen oxide emission trends need to be taken into account when implementing the global anthropogenic methane emissions reduction pledge'. |
| 语种 | 英语 |
| WOS研究方向 | Multidisciplinary Sciences |
| WOS类目 | Science Citation Index Expanded (SCI-EXPANDED) |
| WOS记录号 | WOS:000899725400002 |
| 来源期刊 | NATURE
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/280649 |
| 作者单位 | Peking University; Peking University; Peking University; CEA; Centre National de la Recherche Scientifique (CNRS); Universite Paris Saclay; Universite Paris Cite; NILU; University of Colorado System; University of Colorado Boulder; National Oceanic Atmospheric Admin (NOAA) - USA; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center; California Institute of Technology; University System of Maryland; University of Maryland College Park; Tsinghua University; Tsinghua Shenzhen International Graduate School |
| 推荐引用方式 GB/T 7714 | Peng, Shushi,Lin, Xin,Thompson, Rona L.,et al. Wetland emission and atmospheric sink changes explain methane growth in 2020[J],2022,612(7940). |
| APA | Peng, Shushi.,Lin, Xin.,Thompson, Rona L..,Xi, Yi.,Liu, Gang.,...&Ciais, Philippe.(2022).Wetland emission and atmospheric sink changes explain methane growth in 2020.NATURE,612(7940). |
| MLA | Peng, Shushi,et al."Wetland emission and atmospheric sink changes explain methane growth in 2020".NATURE 612.7940(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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