Temperature Influence on the Variability and Emission of CH4 and CO2 from a Former Manchester Landfill
Abstract
Analysis of datasets in time order was carried out to determine the consequence of atmospheric
temperature on the changes in CH4 and CO2 concentrations at a former landfill site. The Gasclam
(in-borehole gas monitor) was used to collect field data of CH4/CO2 concentrations and the
environmental parameters. The magnitude of the relationship of ground-gas concentration and the
barometric temperature was obtained by linear regression analysis. The result reveals variability in
CH4 and CO2 concentrations with poor positive relationships of 0.016 and 0.014, respectively,
with barometric temperature over the whole sampling period. Despite slightly improving the R2 by
taking into account their concentration over single phases of upward and downward limb
temperature, single phases of upward limb temperature, and single phases of downward limb
temperature, their correlations remained insignificant at a 95% confidence level. The implication
is that temperature (just like pressure) is not the dominant influence on CH4 and CO2
concentrations changes at this site. Having established barometric pressure and temperature as
minor controls, a recommendation was made for the establishment of other potential controls
(particularly variations in the site water depth) and their degree of control.
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