期刊
GEOPHYSICAL RESEARCH LETTERS
卷 42, 期 9, 页码 3371-3379出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL063469
关键词
peatland; methane ebullition; environmental forcing; cellular automaton
资金
- School of Geography at the University of Leeds
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.
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