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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The effect of peat structure on the spatial distribution of biogenic gases within bogs
AU - Comas, Xavier
AU - Kettridge, Nicholas
AU - Binley, Andrew
AU - Slater, Lee
AU - Parsekian, Andrew
AU - Baird, Andy J.
AU - Strack, Maria
AU - Waddington, James M.
PY - 2014/11/30
Y1 - 2014/11/30
N2 - Northern peatlands are a large source of atmospheric methane (CH4) and both a source and a sink of atmospheric carbon dioxide (CO2). The rate and temporal variability in gas exchanges with peat soils is directly related to the spatial distribution of these free-phase gases within the peat column. In this paper, we present results from surface and borehole ground-penetrating radar surveys - constrained with direct soil and gas sampling - that compare the spatial distribution of gas accumulations in two raised bogs: one in Wales (UK), the other in Maine (USA). Although the two peatlands have similar average thickness, physical properties of the peat matrix differ, particularly in terms of peat type and degree of humification. We hypothesize that these variations in physical properties are responsible for the differences in gas distribution between the two peatlands characterized by (1) gas content up to 10.8% associated with woody peat and presence of wood layers in Caribou Bog (Maine) and (2) a more homogenous distribution with gas content up to 5.7% at the surface (i.e.
AB - Northern peatlands are a large source of atmospheric methane (CH4) and both a source and a sink of atmospheric carbon dioxide (CO2). The rate and temporal variability in gas exchanges with peat soils is directly related to the spatial distribution of these free-phase gases within the peat column. In this paper, we present results from surface and borehole ground-penetrating radar surveys - constrained with direct soil and gas sampling - that compare the spatial distribution of gas accumulations in two raised bogs: one in Wales (UK), the other in Maine (USA). Although the two peatlands have similar average thickness, physical properties of the peat matrix differ, particularly in terms of peat type and degree of humification. We hypothesize that these variations in physical properties are responsible for the differences in gas distribution between the two peatlands characterized by (1) gas content up to 10.8% associated with woody peat and presence of wood layers in Caribou Bog (Maine) and (2) a more homogenous distribution with gas content up to 5.7% at the surface (i.e.
KW - geophysics
KW - peatlands
KW - carbon cycle
KW - GROUND-PENETRATING RADAR
KW - NORTHERN PEATLANDS
KW - CARBON-DIOXIDE
KW - RAISED BOGS
KW - METHANE
KW - ACCUMULATION
KW - MINNESOTA
KW - BUBBLES
KW - VELOCITY
KW - COMPLEX
U2 - 10.1002/hyp.10056
DO - 10.1002/hyp.10056
M3 - Journal article
VL - 28
SP - 5483
EP - 5494
JO - Hydrological Processes
JF - Hydrological Processes
SN - 0885-6087
IS - 22
ER -