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Title: Global wetland contribution to 2000–2012 atmospheric methane growth rate dynamics

Abstract

Increasing atmospheric methane (CH 4) concentrations have contributed to approximately 20% of anthropogenic climate change. Despite the importance of CH 4 as a greenhouse gas, its atmospheric growth rate and dynamics over the past two decades, which include a stabilization period (1999–2006), followed by renewed growth starting in 2007, remain poorly understood. We provide an updated estimate of CH 4 emissions from wetlands, the largest natural global CH 4 source, for 2000–2012 using an ensemble of biogeochemical models constrained with remote sensing surface inundation and inventory-based wetland area data. Between 2000–2012, boreal wetland CH 4 emissions increased by 1.2 Tg yr –1 (–0.2–3.5 Tg yr –1), tropical emissions decreased by 0.9 Tg yr –1 (–3.2–1.1 Tg yr –1), yet globally, emissions remained unchanged at 184 ± 22 Tg yr –1. Changing air temperature was responsible for increasing high-latitude emissions whereas declines in low-latitude wetland area decreased tropical emissions; both dynamics are consistent with features of predicted centennial-scale climate change impacts on wetland CH 4 emissions. Despite uncertainties in wetland area mapping, our study shows that global wetland CH 4 emissions have not contributed significantly to the period of renewed atmospheric CH 4 growth, and is consistent with findings from studiesmore » that indicate some combination of increasing fossil fuel and agriculture-related CH 4 emissions, and a decrease in the atmospheric oxidative sink.« less

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3];  [2];  [2];  [2];  [4];  [5]; ORCiD logo [6];  [7];  [8]; ORCiD logo [9];  [10];  [6];  [11];  [12];  [4];  [13];  [2];  [14] more »;  [15];  [11];  [10];  [8];  [16];  [5];  [2];  [5];  [7];  [17];  [16]; ORCiD logo [18];  [19] « less
  1. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Montana State Univ., Bozeman, MT (United States)
  2. Lab. des Sciences du Climat et de l'Environment, Gif-sur-Yvette (France)
  3. CSIRO Marine and Atmospheric Research Oceans and Atmosphere, Canberra, ACT (Australia)
  4. Climate Research Division Environment Canada, Victoria, BC (Canada)
  5. Univ. of Sheffield, Sheffield (United Kingdom)
  6. Max Planck Institute for Meteorology, Hamburg (Germany)
  7. Met Office Hadley Centre, Exeter (United Kingdom)
  8. Univ. of Bern (Switzerland)
  9. Met Office Hadley Centre, Wallingford (United Kingdom)
  10. National Institute for Environmental Studies, Tsukuba (Japan)
  11. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  12. City Univ. of New York, New York, NY (United States)
  13. Univ. of Quebec at Montreal, Montreal, QC (Canada)
  14. Observatoire de Paris, Paris (France)
  15. Univ. of New Hampshire, Durham, NH (United States)
  16. Auburn Univ., Auburn, AL (United States)
  17. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Chinese Academy of Sciences (CAS), Beijing (China)
  18. Montana State Univ., Bozeman, MT (United States); Swiss Federal Research Institute WSL, Birmensdorf (Switzerland)
  19. Northwest A&F Univ., Yangling (People's Republic of China)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1408475
Grant/Contract Number:  
[AC02-05CH11231]
Resource Type:
Accepted Manuscript
Journal Name:
Environmental Research Letters
Additional Journal Information:
[ Journal Volume: 12; Journal Issue: 9]; Journal ID: ISSN 1748-9326
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; methanogenesis; wetlands; methane

Citation Formats

Poulter, Benjamin, Bousquet, Philippe, Canadell, Josep G., Ciais, Philippe, Peregon, Anna, Saunois, Marielle, Arora, Vivek K., Beerling, David J., Brovkin, Victor, Jones, Chris D., Joos, Fortunat, Gedney, Nicola, Ito, Akihito, Kleinen, Thomas, Koven, Charles D., McDonald, Kyle, Melton, Joe R., Peng, Changhui, Peng, Shushi, Prigent, Catherine, Schroeder, Ronny, Riley, William J., Saito, Makoto, Spahni, Renato, Tian, Hanqin, Taylor, Lyla, Viovy, Nicolas, Wilton, David, Wiltshire, Andy, Xu, Xiyan, Zhang, Bowen, Zhang, Zhen, and Zhu, Qiuan. Global wetland contribution to 2000–2012 atmospheric methane growth rate dynamics. United States: N. p., 2017. Web. doi:10.1088/1748-9326/aa8391.
Poulter, Benjamin, Bousquet, Philippe, Canadell, Josep G., Ciais, Philippe, Peregon, Anna, Saunois, Marielle, Arora, Vivek K., Beerling, David J., Brovkin, Victor, Jones, Chris D., Joos, Fortunat, Gedney, Nicola, Ito, Akihito, Kleinen, Thomas, Koven, Charles D., McDonald, Kyle, Melton, Joe R., Peng, Changhui, Peng, Shushi, Prigent, Catherine, Schroeder, Ronny, Riley, William J., Saito, Makoto, Spahni, Renato, Tian, Hanqin, Taylor, Lyla, Viovy, Nicolas, Wilton, David, Wiltshire, Andy, Xu, Xiyan, Zhang, Bowen, Zhang, Zhen, & Zhu, Qiuan. Global wetland contribution to 2000–2012 atmospheric methane growth rate dynamics. United States. doi:10.1088/1748-9326/aa8391.
Poulter, Benjamin, Bousquet, Philippe, Canadell, Josep G., Ciais, Philippe, Peregon, Anna, Saunois, Marielle, Arora, Vivek K., Beerling, David J., Brovkin, Victor, Jones, Chris D., Joos, Fortunat, Gedney, Nicola, Ito, Akihito, Kleinen, Thomas, Koven, Charles D., McDonald, Kyle, Melton, Joe R., Peng, Changhui, Peng, Shushi, Prigent, Catherine, Schroeder, Ronny, Riley, William J., Saito, Makoto, Spahni, Renato, Tian, Hanqin, Taylor, Lyla, Viovy, Nicolas, Wilton, David, Wiltshire, Andy, Xu, Xiyan, Zhang, Bowen, Zhang, Zhen, and Zhu, Qiuan. Wed . "Global wetland contribution to 2000–2012 atmospheric methane growth rate dynamics". United States. doi:10.1088/1748-9326/aa8391. https://www.osti.gov/servlets/purl/1408475.
@article{osti_1408475,
title = {Global wetland contribution to 2000–2012 atmospheric methane growth rate dynamics},
author = {Poulter, Benjamin and Bousquet, Philippe and Canadell, Josep G. and Ciais, Philippe and Peregon, Anna and Saunois, Marielle and Arora, Vivek K. and Beerling, David J. and Brovkin, Victor and Jones, Chris D. and Joos, Fortunat and Gedney, Nicola and Ito, Akihito and Kleinen, Thomas and Koven, Charles D. and McDonald, Kyle and Melton, Joe R. and Peng, Changhui and Peng, Shushi and Prigent, Catherine and Schroeder, Ronny and Riley, William J. and Saito, Makoto and Spahni, Renato and Tian, Hanqin and Taylor, Lyla and Viovy, Nicolas and Wilton, David and Wiltshire, Andy and Xu, Xiyan and Zhang, Bowen and Zhang, Zhen and Zhu, Qiuan},
abstractNote = {Increasing atmospheric methane (CH4) concentrations have contributed to approximately 20% of anthropogenic climate change. Despite the importance of CH4 as a greenhouse gas, its atmospheric growth rate and dynamics over the past two decades, which include a stabilization period (1999–2006), followed by renewed growth starting in 2007, remain poorly understood. We provide an updated estimate of CH4 emissions from wetlands, the largest natural global CH4 source, for 2000–2012 using an ensemble of biogeochemical models constrained with remote sensing surface inundation and inventory-based wetland area data. Between 2000–2012, boreal wetland CH4 emissions increased by 1.2 Tg yr–1 (–0.2–3.5 Tg yr–1), tropical emissions decreased by 0.9 Tg yr–1 (–3.2–1.1 Tg yr–1), yet globally, emissions remained unchanged at 184 ± 22 Tg yr–1. Changing air temperature was responsible for increasing high-latitude emissions whereas declines in low-latitude wetland area decreased tropical emissions; both dynamics are consistent with features of predicted centennial-scale climate change impacts on wetland CH4 emissions. Despite uncertainties in wetland area mapping, our study shows that global wetland CH4 emissions have not contributed significantly to the period of renewed atmospheric CH4 growth, and is consistent with findings from studies that indicate some combination of increasing fossil fuel and agriculture-related CH4 emissions, and a decrease in the atmospheric oxidative sink.},
doi = {10.1088/1748-9326/aa8391},
journal = {Environmental Research Letters},
number = [9],
volume = [12],
place = {United States},
year = {2017},
month = {9}
}

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  • DOI: 10.1038/nature13265

Impact of an abrupt cooling event on interglacial methane emissions in northern peatlands
journal, January 2013


    Works referencing / citing this record:

    Carbon budgets for 1.5 and 2 °C targets lowered by natural wetland and permafrost feedbacks
    journal, July 2018


    The global methane budget 2000–2012
    journal, January 2016

    • Saunois, Marielle; Bousquet, Philippe; Poulter, Ben
    • Earth System Science Data, Vol. 8, Issue 2
    • DOI: 10.5194/essd-8-697-2016