Determination of respiration and photosynthesis fractionation factors for atmospheric dioxygen inferred from a vegetation–soil–atmosphere analogue of the terrestrial biosphere in closed chambers
Ecotron Européen de Montpellier (UAR 3248),
Centre National de la Recherche Scientifique (CNRS), Campus Baillarguet, Université Montpellier,
Montferrier-sur-Lez, France
Joana Sauze
Ecotron Européen de Montpellier (UAR 3248),
Centre National de la Recherche Scientifique (CNRS), Campus Baillarguet, Université Montpellier,
Montferrier-sur-Lez, France
Nicolas Pasquier
Laboratoire des Sciences du Climat et de l'Environnement,
LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette,
France
Frédéric Prié
Laboratoire des Sciences du Climat et de l'Environnement,
LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette,
France
Sébastien Devidal
Ecotron Européen de Montpellier (UAR 3248),
Centre National de la Recherche Scientifique (CNRS), Campus Baillarguet, Université Montpellier,
Montferrier-sur-Lez, France
Roxanne Jacob
Laboratoire des Sciences du Climat et de l'Environnement,
LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette,
France
Arnaud Dapoigny
Laboratoire des Sciences du Climat et de l'Environnement,
LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette,
France
Ecotron Européen de Montpellier (UAR 3248),
Centre National de la Recherche Scientifique (CNRS), Campus Baillarguet, Université Montpellier,
Montferrier-sur-Lez, France
Centre d'Ecologie Fonctionnelle et Evolutive, Université Montpellier, CNRS,
Université Paul Valéry, EPHE, IRD, Montpellier, France
Amaëlle Landais
Laboratoire des Sciences du Climat et de l'Environnement,
LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette,
France
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To improve the interpretation of the δ18Oatm and Δ17O of O2 in air bubbles in ice cores, we need to better quantify the oxygen fractionation coefficients associated with biological processes. We performed a simplified analogue of the terrestrial biosphere in a closed chamber. We found a respiration fractionation in agreement with the previous estimates at the microorganism scale, and a terrestrial photosynthetic fractionation was found. This has an impact on the estimation of the Dole effect.
To improve the interpretation of the δ18Oatm and Δ17O of O2 in air bubbles in ice cores, we need...
