Soil carbon dioxide fluxes to atmosphere: the role of rainfall over CO2 transport
| Autor: | Grégory Cohen, Patrick Höhener, Olivier Atteia, Marian Momtbrun, Isabelle Delsarte |
|---|---|
| Přispěvatelé: | Géoressources et environnement, Institut Polytechnique de Bordeaux (Bordeaux INP)-Université Bordeaux Montaigne, Institut Polytechnique de Bordeaux (Bordeaux INP)-Université Bordeaux Montaigne (UBM), Laboratoire Chimie de l'environnement (LCE), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
soil CO2 flux
[SDE.IE]Environmental Sciences/Environmental Engineering Soil gas [SDE.MCG]Environmental Sciences/Global Changes rainfall Co2 flux CO2 concentration Soil carbon 010501 environmental sciences 010502 geochemistry & geophysics Atmospheric sciences 01 natural sciences Pollution 6. Clean water Atmosphere Flux (metallurgy) Simulated rainfall 13. Climate action Geochemistry and Petrology Lysimeter soil gas concentration and fluxes monitoring Environmental Chemistry Environmental science Soil horizon 0105 earth and related environmental sciences |
| Zdroj: | Applied Geochemistry Applied Geochemistry, Elsevier, 2021, 127, pp.104854. ⟨10.1016/j.apgeochem.2020.104854⟩ Applied Geochemistry, 2021, 127, pp.104854. ⟨10.1016/j.apgeochem.2020.104854⟩ |
| ISSN: | 0883-2927 |
| DOI: | 10.1016/j.apgeochem.2020.104854⟩ |
| Popis: | International audience; In order to observe the relationships between the temporal variations of CO2 surface fluxes and the CO2 soil gas transport in soil profile before and during rainfall events, two experiments were conducted in a controlled natural environment at different time periods. These experiments consisted in injecting pure CO2 in a lysimeter at 160 cm depth and simulating heavy rainfall event at its surface for 2 weeks. During the whole experiments, CO2 soil gas concentrations and surface fluxes were continuously monitored. These measurements showed that the flux measured through the flux chamber were consistent with the concentration profiles. During simulated rainfall events, the concentrations and fluxes showed a clear change linked to the presence of water on the top of the water profile. The results clearly show a significant decrease of CO2 flux to atmosphere induced by rainfall infiltration and consequential wash-out of the CO2 present in the soil. |
| Databáze: | OpenAIRE |
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