Abstract
The evolution of CO2 concentrations in selected soils of the Moravian Karst (Czech Republic) was studied during a 1-year period from August 2008 to July 2009. CO2 concentrations directly measured in air of the soils of coniferous and deciduous forests reached up to 0.5 vol%. Substantially, higher CO2 concentrations, over 1 vol%, were found in thicker sinkhole soils under grassy vegetation. CO2 concentrations showed strong seasonality with maxima in summer and minima in winter at all sites. On the basis of temperature dependence, \( \ln c_{{{\text{CO}}_{ 2} }} = b_{0} - b_{1} /T \) (where \(c_{{{\text{CO}}_{ 2} }}\) is CO2 concentration in mol/L, T is temperatures in Kelvin, and b 1, b 2 are constants); all CO2 concentrations were normalized to 10 °C. These concentrations did not correlate with rainfall or soil profile depth. The remaining maxima in the time series of CO2 concentrations (a sharp peak especially in July) might be the result of increased plant respiration during enhanced photosynthesis activity during the early-summer stage of the green period.
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Acknowledgments
The research was supported by funding from Masaryk University. The authors wish to thank Christopher S. Swezey who helped to substantially improve the manuscript. Thanks also belong to the Czech Hydrometeorological Institute for providing meteorological data from the meteorological station in Protivanov.
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Blecha, M., Faimon, J. Spatial and temporal variations in carbon dioxide (CO2) concentrations in selected soils of the Moravian Karst (Czech Republic). Carbonates Evaporites 29, 395–408 (2014). https://doi.org/10.1007/s13146-014-0220-7
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DOI: https://doi.org/10.1007/s13146-014-0220-7