Skip to Main content Skip to Navigation
Theses

Effets d’une contamination diffuse des sols sur leurs émissions de gaz à effet de serre : cas du cuivre pour la prise en compte d’une contamination dans les modèles de surface continentale et l’évolution des risques en contexte de changement climatique

Abstract : In the context of climate change, it is essential to understand the factors modulating greenhouse gas (GHG) emissions from soils (CO2, N2O, NOx...). Among these, pedo-climatic factors are mainly studied. However, soil contamination is not considered despite the large surface areas already concerned. However, it is known that contamination can affect the activities of soil organisms at the origin of the greenhouse gases emissions, but the result on global emissions remains poorly understood. To answer this question, we studied copper (Cu) because of its numerous uses for instance in agriculture and its reactivity with soil constituents and worked along two axes: i) to associate at the continental scale a Cu contamination of soils with the different forms of Cu and their risk for the environment; ii) to integrate response functions to Cu for GHG emissions related to C and N cycles in land surface models.A first part studying the (bio)availability of Cu at the European scale and the effects of a double stress (moisture and contamination) on soil nitrification showed that historical, present and future soil-climatic conditions influence the magnitude of the impact of a contamination. In the second part, we confirmed the need to take contamination into account in the estimation of soil GHG fluxes by land surface models to estimate soil heterotrophic respiration. We established functions relating soil Cu concentration to soil CO2 emissions and soil N species emissions for different soil moisture and re-parameterized the DNDC biogeochemical model into a DNDC-Cu version. Then, we used our DNDC-Cu to estimate N species emissions for contaminated soils under different soil moistures.
Document type :
Theses
Complete list of metadata

https://pastel.archives-ouvertes.fr/tel-03520544
Contributor : ABES STAR :  Contact
Submitted on : Tuesday, January 11, 2022 - 9:57:26 AM
Last modification on : Friday, August 5, 2022 - 2:41:12 PM
Long-term archiving on: : Tuesday, April 12, 2022 - 6:39:23 PM

File

102036_SERENI_2021_archivage.p...
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-03520544, version 1

Citation

Laura Sereni. Effets d’une contamination diffuse des sols sur leurs émissions de gaz à effet de serre : cas du cuivre pour la prise en compte d’une contamination dans les modèles de surface continentale et l’évolution des risques en contexte de changement climatique. Ingénierie de l'environnement. Université Paris-Saclay, 2021. Français. ⟨NNT : 2021UPASB066⟩. ⟨tel-03520544⟩

Share

Metrics

Record views

109

Files downloads

39