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Master thesis

Investigation of greenhouse gas emissions from drained organic forest soils

Abstract : Within a period of six months in the laboratory of Ecophysiology and Biogeochemistry GU, greenhouse gas emissions of a drained organic boreal forest soils have been studied. At first, to asses the soil-air exchange of N2O, CH4 and CO2 from 2009 to 2011 using the static chambers standard method and a portable infrared gas analyser. The results showed that the spruce forest of Skogaryd was a sink of CH4 and a net source of N2O and CO2. The second experiment was to study the soil gas profile for each gas, to discuss the location of the gas production during the year, using the gas probe method. The highest N2O concentrations were observed mainly at 15 and 30 cm depths and the highest CH4 concentrations at 30 and 60 cm depths. Peaks of concentration occurred notably during events of precipitation, during the summer and during winter in freeze-thaw cycles. The third part of this study was to investigate the physical factors as an explanation of the results obtained. Additionally the GWL was assessed if it could be used as an index to improve the drainage of the soil. The moisture of the soil was found as a major factor for N2O production but not clearly for CH4. The soil temperature was not found as a major factor controlling the gas production. Finally the GWL cannot be used as index to explain observed variations but rather the moisture as a more precise method.
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Master thesis
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Submitted on : Wednesday, May 9, 2018 - 3:08:00 PM
Last modification on : Saturday, April 30, 2022 - 4:03:26 PM

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  • HAL Id : hal-01788890, version 1



Nadia Maaroufi. Investigation of greenhouse gas emissions from drained organic forest soils. Environmental Sciences. 2011. ⟨hal-01788890⟩



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