McNorton, J, Gloor, E orcid.org/0000-0002-9384-6341, Wilson, C orcid.org/0000-0001-8494-0697 et al. (7 more authors) (2016) Role of regional wetland emissions in atmospheric methane variability. Geophysical Research Letters, 43 (21). pp. 11433-11444. ISSN 0094-8276
Abstract
Atmospheric methane (CH4) accounts for ~20% of the total direct anthropogenic radiative forcing by long-lived greenhouse gases. Surface observations show a pause (1999-2006) followed by a resumption in CH4 growth, which remain largely unexplained. Using a land surface model, we estimate wetland CH4 emissions from 1993 to 2014 and study the regional contributions to changes in atmospheric CH4. Atmospheric model simulations using these emissions, together with other sources, compare well with surface and satellite CH4 data. Modelled global wetland emissions vary by ±3%/yr (σ=4.8 Tg), mainly due to precipitation-induced changes in wetland area, but the integrated effect makes only a small contribution to the pause in CH4 growth from 1999 to 2006. Increasing temperature, which increases wetland area, drives a long-term trend in wetland CH4 emissions of +0.2%/yr (1999 to 2014). The increased growth post-2006 was partly caused by increased wetland emissions (+3%), mainly from Tropical Asia, Sourthern Africa and Australia.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | Methane; Wetlands; Atmosphere |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds) The University of Leeds > Faculty of Environment (Leeds) > School of Geography (Leeds) > Ecology & Global Change (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 11 Nov 2016 15:43 |
Last Modified: | 02 Apr 2019 12:40 |
Published Version: | http://doi.org/10.1002/2016GL070649 |
Status: | Published |
Publisher: | American Geophysical Union |
Identification Number: | 10.1002/2016GL070649 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:107276 |