Methane Emissions from Wetlands in China and Their Climate Feedbacks in the 21st Century,Environmental Science & Technology

当前位置： X-MOL 学术 › Environ. Sci. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Methane Emissions from Wetlands in China and Their Climate Feedbacks in the 21st Century
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2022-08-09 , DOI: 10.1021/acs.est.2c01575
Tingting Li _{1,

2} , Josep G Canadell ₃ , Xiu-Qun Yang _{2,

4} , Panmao Zhai ₅ , Qingchen Chao ₆ , Yanyu Lu ₇ , Danqing Huang ₄ , Wenjuan Sun ₈ , Zhangcai Qin _{2,

9}

Affiliation

Wetlands are large sinks of carbon dioxide (CO₂) and sources of methane (CH₄). Both fluxes can be altered by wetland management (e.g., restoration), leading to changes in the climate system. Here, we use multiple models to assess CH₄ emissions and CO₂ sequestration from the wetlands in China and the impacts on climate under three climate scenarios and four wetland management scenarios with various levels of wetland restoration in the 21st century. We find that wetland restoration leads to increased CH₄ emissions with a national total of 0.32–11.31 Tg yr^–1. These emissions induce an additional radiative forcing of 0.0005–0.0075 W m^–2 yr^–1 and global annual mean air temperature rise of 0.0003–0.0053 °C yr^–1, across all future climate and management scenarios. However, wetland restoration also resulted in net CO₂ sequestration, leading to a combined net greenhouse gas sink in all climate management scenarios, except in the highest restoration level combined with the hottest climate scenario. The highest climate cooling was achieved under medium restoration, with the climate scenario consistent with the Paris agreement target of below 2 °C, with a cumulative global warming potential of −3.2 Pg CO₂-eq (2020–2100). Wetland restoration in the Qinghai–Tibet Plateau offers the greatest cooling effect.

更新日期：2022-08-09

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11