Rewetting global wetlands effectively reduces major greenhouse gas emissions

Zou, Junyu1; Ziegler, Alan D.2; Chen, Deliang3; McNicol, Gavin4; Ciais, Philippe5,6; Jiang, Xin1; Zheng, Chunmiao1,7; Wu, Jie1,8; Wu, Jin9,10,11; Lin, Ziyu1,9,10; He, Xinyue1,12; Brown, Lee E.13; Holden, Joseph13; Zhang, Zuotai1; Ramchunder, Sorain J.14; Chen, Anping15,16; Zeng, Zhenzhong1

2022-07-01

10.1038/s41561-022-00989-0

Nature Geoscience   Impact Factor & Quartile

1752-0894

1752-0908

["Carbon and nitrogen losses from degraded wetlands and methane emissions from flooded wetlands are both important sources of greenhouse gas emissions. However, the net-exchange dependence on hydrothermal conditions and wetland integrity remains unclear. Using a global-scale in situ database on net greenhouse gas exchanges, we show diverse hydrology-influenced emission patterns in CO2, CH4 and N2O. We find that total CO2-equivalent emissions from wetlands are kept to a minimum when the water table is near the surface. By contrast, greenhouse gas exchange rates peak in flooded and drained conditions. By extrapolating the current trajectory of degradation, we estimate that between 2021 and 2100, wetlands could result in greenhouse gas emissions equivalent to around 408 gigatons of CO2. However, rewetting wetlands could reduce these emissions such that the radiative forcing caused by CH4 and N2O is fully compensated by CO2 uptake. As wetland greenhouse gas budgets are highly sensitive to changes in wetland area, the resulting impact on climate from wetlands will depend on the balance between future degradation and restoration.","Global in situ observations show greenhouse gas emissions from wetlands are lowest when the water table is near the surface, and therefore rewetting wetlands could substantially reduce future emissions."]

SCI

English

NI Journal Papers

First ; Corresponding

National Natural Science Foundation of China[42071022] ; Southern University of Science and Technology["29/Y01296122","G02296302"] ; CLAND Convergence Institute[16-CONV-0003]

Geology

Geosciences, Multidisciplinary

WOS:000832487600001

NATURE PORTFOLIO

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, Peoples R China
2.Mae Jo Univ, Fac Fisheries Technol & Aquat Resources, Chiang Mai, Thailand
3.Univ Gothenburg, Dept Earth Sci, Reg Climate Grp, Gothenburg, Sweden
4.Univ Illinois, Dept Earth & Environm Sci, Chicago, IL USA
5.CEA CNRS UVSQ, Lab Sci Climat & Environm LSCE, Gif Sur Yvette, France
6.CYPRUS Inst, Nicosia, Cyprus
7.EIT Inst Adv Study, Ningbo, Zhejiang, Peoples R China
8.Univ Copenhagen, Dept Geosci & Nat Resource Management, Copenhagen, Denmark
9.Univ Hong Kong, Sch Biol Sci, Hong Kong, Peoples R China
10.Univ Hong Kong, Inst Climate & Carbon Neutral, Hong Kong, Peoples R China
11.Chinese Univ Hong Kong, State Key Lab Agrobiotechnol, Hong Kong, Peoples R China
12.Univ Leeds, Sch Earth & Environm, Leeds, W Yorkshire, England
13.Univ Leeds, Sch Geog, Water Leeds, Leeds, W Yorkshire, England
14.Natl Pk Board, Singapore Bot Gardens, Singapore, Singapore
15.Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA
16.Colorado State Univ, Grad Degree Program Ecol, Ft Collins, CO 80523 USA

Zou, Junyu,Ziegler, Alan D.,Chen, Deliang,et al. Rewetting global wetlands effectively reduces major greenhouse gas emissions[J]. Nature Geoscience,2022.

Zou, Junyu.,Ziegler, Alan D..,Chen, Deliang.,McNicol, Gavin.,Ciais, Philippe.,...&Zeng, Zhenzhong.(2022).Rewetting global wetlands effectively reduces major greenhouse gas emissions.Nature Geoscience.

Zou, Junyu,et al."Rewetting global wetlands effectively reduces major greenhouse gas emissions".Nature Geoscience (2022).