PoulterBousquetCanadellEtAl2017

Référence

Poulter, B., Bousquet, P., Canadell, J.G., Ciais, P., Peregon, A., Saunois, M., Arora, V.K., Beerling, D.J., Brovkin, V., Jones, C.D., Joos, F., Gedney, N., Ito, A., Kleinen, T., Koven, C.D., McDonald, K., Melton, J.R., Peng, C., Peng, S., Prigent, C., Schroeder, R., Riley, W.J., Saito, M., Spahni, R., Tian, H., Taylor, L., Viovy, N., Wilton, D., Wiltshire, A., Xu, X., Zhang, B., Zhang, Z. and Zhu, Q. (2017) Global wetland contribution to 2000-2012 atmospheric methane growth rate dynamics. Environmental Research Letters, 12(9). (Scopus )

Résumé

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. © 2017 The Author(s). Published by IOP Publishing Ltd.

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@ARTICLE { PoulterBousquetCanadellEtAl2017,
    AUTHOR = { Poulter, B. and Bousquet, P. and Canadell, J.G. and Ciais, P. and Peregon, A. and Saunois, M. and Arora, V.K. and Beerling, D.J. and Brovkin, V. and Jones, C.D. and Joos, F. and Gedney, N. and Ito, A. and Kleinen, T. and Koven, C.D. and McDonald, K. and Melton, J.R. and Peng, C. and Peng, S. and Prigent, C. and Schroeder, R. and Riley, W.J. and Saito, M. and Spahni, R. and Tian, H. and Taylor, L. and Viovy, N. and Wilton, D. and Wiltshire, A. and Xu, X. and Zhang, B. and Zhang, Z. and Zhu, Q. },
    TITLE = { Global wetland contribution to 2000-2012 atmospheric methane growth rate dynamics },
    JOURNAL = { Environmental Research Letters },
    YEAR = { 2017 },
    VOLUME = { 12 },
    NUMBER = { 9 },
    NOTE = { cited By 3 },
    ABSTRACT = { 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. © 2017 The Author(s). Published by IOP Publishing Ltd. },
    AFFILIATION = { NASA Goddard Space Flight Center, Biospheric Sciences Laboratory, Greenbelt, MD, United States; Institute on Ecosystems and Department of Ecology, Montana State University, Bozeman, MT, United States; Laboratoire des Sciences du Climat et de l'Environnement, LSCE-IPSL (CEA-CNRS-UVSQ), Gif-sur-Yvette, France; Global Carbon Project, CSIRO Marine and Atmospheric Research Oceans and Atmosphere, Canberra, ACT, Australia; Climate Research Division Environment Canada, V8W 2Y2, Victoria, BC, Canada; Department of Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom; Max Planck Institute for Meteorology, Bundesstrasse 53, Hamburg, Germany; Met Office Hadley Centre, FitzRoy Road, Exeter, United Kingdom; Climate and Environmental Physics, Physics Institute and Oeschger Centre for Climate Change Research, University of Bern, Switzerland; Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan; Climate and Ecosystem Sciences Division, Lawrence Berkeley National Lab, 1 Cyclotron Road, Berkeley, CA, United States; Department of Earth and Atmospheric Sciences, City University of New York, New York, NY, United States; Department of Biology Sciences, Institute of Environment Science, University of Quebec at Montreal, Montreal, QC, Canada; CNRS/LERMA, Observatoire de Paris, 61 Ave. de l'Observatoire, Paris, France; Department of Civil and Environmental Engineering, University of New Hampshire, Durham, NH, United States; Intl. Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL, United States; Swiss Federal Research Institute WSL, Birmensdorf, Switzerland; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest AandF University, Yangling, China; Met Office Hadley Centre, Joint Centre for Hydrometeorological Research, Maclean Building, Wallingford, United Kingdom; Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China },
    ART_NUMBER = { 094013 },
    AUTHOR_KEYWORDS = { methane; methanogenesis; wetlands },
    DOCUMENT_TYPE = { Review },
    DOI = { 10.1088/1748-9326/aa8391 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021866528&doi=10.1088%2f1748-9326%2faa8391&partnerID=40&md5=69b144c3469d229ef8b7f70b9b4af8f8 },
}

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