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Ebullition of methane from peatlands: does peat act as a signal shredder?

Ramirez, Jorge A.; Baird, Andy J.; Coulthard, Tom J.; Waddington, J. Michael

Authors

Jorge A. Ramirez

Andy J. Baird

J. Michael Waddington

Abstract

Bubbling (ebullition) of greenhouse gases, particularly methane, from peatlands has been attributed to environmental forcings, such as changes in atmospheric pressure. However, observations from peat soils suggest that ebullition and environmental forcing may not always be correlated and that interactions between bubbles and the peat structure may be the cause of such decoupling. To investigate this possibility, we used a simple computer model (Model of Ebullition and Gas storAge) to simulate methane ebullition from a model peat. We found that lower porosity peat can store methane bubbles for lengthy periods of time, effectively buffering or moderating ebullition so that it no longer reflects bubble production signals. Our results suggest that peat structure may act as a “signal shredder” and needs to be taken into account when measuring and modeling ebullition.

Journal Article Type Letter
Publication Date May 16, 2015
Journal Geophysical research letters
Print ISSN 0094-8276
Electronic ISSN 1944-8007
Publisher American Geophysical Union
Peer Reviewed Peer Reviewed
Volume 42
Issue 9
Pages 3371-3379
Institution Citation Ramirez, J. A., Baird, A. J., Coulthard, T. J., & Waddington, J. M. (2015). Ebullition of methane from peatlands: does peat act as a signal shredder?. Geophysical research letters, 42(9), 3371-3379. https://doi.org/10.1002/2015gl063469
DOI https://doi.org/10.1002/2015gl063469
Keywords Methane; Peatland
Publisher URL http://onlinelibrary.wiley.com/doi/10.1002/2015GL063469/abstract
Additional Information Copy of article first published in: Geophysical research letters, 2015, v.42, issue 9 at http://onlinelibrary.wi...2/2015GL063469/abstract

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Copyright Statement
©2015 American Geophysical Union.




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