Inorganic carbon fluxes across the vadose zone of planted and unplanted soil mesocosms
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Inorganic carbon fluxes across the vadose zone of planted and unplanted soil mesocosms. / Thaysen, Eike Marie; Jacques, Diederik; Jessen, Søren; Andersen, C.E.; Laloy, Eric; Ambus, Per Lennart; Postma, Dieke; Jakobsen, Iver.
I: Biogeosciences, Bind 11, 2014, s. 7179-7192.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Inorganic carbon fluxes across the vadose zone of planted and unplanted soil mesocosms
AU - Thaysen, Eike Marie
AU - Jacques, Diederik
AU - Jessen, Søren
AU - Andersen, C.E.
AU - Laloy, Eric
AU - Ambus, Per Lennart
AU - Postma, Dieke
AU - Jakobsen, Iver
PY - 2014
Y1 - 2014
N2 - The efflux of carbon dioxide (CO2) from soils influences atmospheric CO2 concentrations and thereby climate change. The partitioning of inorganic carbon (C) fluxes in the vadose zone between emission to the atmosphere and to the groundwater was investigated to reveal controlling underlying mechanisms. Carbon dioxide partial pressure in the soil gas (pCO2), alkalinity, soil moisture and temperature were measured over depth and time in unplanted and planted (barley) mesocosms. The dissolved inorganic carbon (DIC) percolation flux was calculated from the pCO2, alkalinity and the water flux at the mesocosm bottom. Carbon dioxide exchange between the soil surface and the atmosphere was measured at regular intervals. The soil diffusivity was determined from soil radon-222 (222Rn) emanation rates and soil air Rn concentration profiles and was used in conjunction with measured pCO2 gradients to calculate the soil CO2 production. Carbon dioxide fluxes were modeled using the HP1 module of the Hydrus 1-D software.
AB - The efflux of carbon dioxide (CO2) from soils influences atmospheric CO2 concentrations and thereby climate change. The partitioning of inorganic carbon (C) fluxes in the vadose zone between emission to the atmosphere and to the groundwater was investigated to reveal controlling underlying mechanisms. Carbon dioxide partial pressure in the soil gas (pCO2), alkalinity, soil moisture and temperature were measured over depth and time in unplanted and planted (barley) mesocosms. The dissolved inorganic carbon (DIC) percolation flux was calculated from the pCO2, alkalinity and the water flux at the mesocosm bottom. Carbon dioxide exchange between the soil surface and the atmosphere was measured at regular intervals. The soil diffusivity was determined from soil radon-222 (222Rn) emanation rates and soil air Rn concentration profiles and was used in conjunction with measured pCO2 gradients to calculate the soil CO2 production. Carbon dioxide fluxes were modeled using the HP1 module of the Hydrus 1-D software.
U2 - 10.5194/bg-11-7179-2014
DO - 10.5194/bg-11-7179-2014
M3 - Journal article
VL - 11
SP - 7179
EP - 7192
JO - Biogeosciences
JF - Biogeosciences
SN - 1726-4170
ER -
ID: 129962302