COMPARISON OF VARIOUS APPROACHES TO DETERMINING CO2 FLUXES FROM THE SOIL BY 222Rn CALIBRATED METHOD
| Autor: | Karol Holý, Monika Műllerová, Palušová, Martin Bulko |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Geologic Sediments
Slovakia 010504 meteorology & atmospheric sciences Atmospheric sciences 01 natural sciences 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Radiation Monitoring Soil Pollutants Radioactive Radiology Nuclear Medicine and imaging Surface layer 0105 earth and related environmental sciences Radiation Radiological and Ultrasound Technology Public Health Environmental and Occupational Health Co2 flux General Medicine Carbon Dioxide Exponential function Radon Spring (device) Calibration Environmental science Seasons Environmental Monitoring |
| Zdroj: | Radiation Protection Dosimetry. 177:144-148 |
| ISSN: | 1742-3406 0144-8420 |
| DOI: | 10.1093/rpd/ncx150 |
| Popis: | Various approaches of determining CO2 fluxes from the soil based on 222Rn calibrated method were tested. It was shown that the exponential fits of CO2 and 222Rn depth profiles led to uncertainties up to 50% if the depth profiles of CO2 and 222Rn concentration were not measured at sufficient depths. However, CO2 fluxes determined from linear fits of CO2 and 222Rn concentrations in the surface layer of the soil are lower than the fluxes determined from exponential fits, and have lower uncertainties. The comparison of CO2 fluxes derived from 222Rn calibrated methods with directly measured CO2 fluxes showed that the latter are usually on the order of tens of percent higher than the former. CO2 flux from sandy-clay and uncultivated soil was estimated to be on the level of 3.0 mmol m-2 h-1 in the spring and around 7.0 mmol m-2 h-1 in the summer. |
| Databáze: | OpenAIRE |
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