Publication details
Karst soils: Dependence of CO2 concentrations on pore dimension
| Authors | |
|---|---|
| Year of publication | 2014 |
| Type | Article in Periodical |
| Magazine / Source | Acta Carsologica |
| MU Faculty or unit | |
| Citation | |
| Web | http://apps.webofknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=6&SID=Z1ReEQaequU7Y8SeS2d&page=1&doc=2 |
| Field | Geochemistry |
| Keywords | CO 2 Concentration Karst Rainfall Temperature Soil |
| Description | CO2 concentrations were studied in the selected soils of the Moravian Karst, Czech Republic. The direct measurement in the air of drill-holes has indicated that the concentrations depend inversely on a pore dimension. The simplified relation between the drill-hole diameter and CO2 concentration, c0(CO2) = (c(CO2)- bD)/(1+aD) was proposed, where c0(CO2) is the CO2 concentration extrapolated to the zero drill-hole diameter in ppmv, c(CO2) is directly measured CO2 concentration in ppmv, and D is drillhole diameter in cm. a and b are parameters in cm-1 and ppmv cm-1, respectively. For the karst soils formed at grass field and deciduous forest, the values of a and b parameters were determined as -0.146±0.012 (standard error) cm-1 and 262.0±56.3 ppmv cm-1, respectively. The dependence between cco2 and D was less obvious for the heavy clay soils of coniferous forest. To understand the dependence better, a conceptual model was created taking into account the concentration gradients and mass fluxes. |