Výsledky vyhledávání - "isotope de l'oxygène"

Dissertation/ Thesis

Etudes expérimentales des fractionnements isotopiques indépendants de la masse dans la réaction de formation de l'ozone en phase plasma

Autor: Baraut, Lambert

L'atmosphère terrestre a subi, au cours de son histoire précoce, de très violents changements dans sa composition chimique. L'émergence des premiers êtres vivants photosynthétique a provoqué la mise en place et la modification des grands cycle

Externí odkaz: http://www.theses.fr/2019MNHN0002

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A new mechanistic framework to predict OCS fluxes from soils

Autor: Bernard Genty, Joana Sauze, J. Kesselmeier, Thomas Launois, H. Van Diest, Lisa Wingate, Jérôme Ogée

Publikováno v: Biogeosciences, Vol 13, Iss 8, Pp 2221-2240 (2016)
AGU Fall meeting
AGU Fall meeting, Dec 2015, San Francisco, United States
Biogeosciences
Biogeosciences, 2016, 13 (8), pp.2221-2240. ⟨10.5194/bg-13-2221-2016⟩
Biogeosciences, European Geosciences Union, 2016, 13 (8), pp.2221-2240. ⟨10.5194/bg-13-2221-2016⟩
Biogeosciences 8 (13), 2221-2240. (2016)

Estimates of photosynthetic and respiratory fluxes at large scales are needed to improve our predictions of the current and future global CO2 cycle. Carbonyl sulfide (OCS) is the most abundant sulfur gas in the atmosphere and has been proposed as a n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86ef0dd4d16747f4256a1391d4484aae
http://www.biogeosciences.net/13/2221/2016/bg-13-2221-2016.pdf

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The role of soil pH on soil carbonic anhydrase activity

Autor: Joana Sauze, Samuel P. Jones, Lisa Wingate, Steven Wohl, Jérôme Ogée

Publikováno v: Biogeosciences
Biogeosciences, European Geosciences Union, 2018, 15 (2), pp.597-612. ⟨10.5194/bg-15-597-2018⟩
Biogeosciences, Vol 15, Pp 597-612 (2018)
Biogeosciences 2 (15), 597-612. (2018)

Carbonic anhydrases (CAs) are metalloenzymes present in plants and microorganisms that catalyse the interconversion of CO2 and water to bicarbonate and protons. Because oxygen isotopes are also exchanged during this reaction, the presence of CA also

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f3f4ea267a938339fde54cf6b68c75d
https://hal.inrae.fr/hal-02627194/document

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Comparisons of the performance of δ13C and δ18O of F. sylvatica, P. sylvestris and Q. petraea in the record of past climate variations

Autor: Daux, Valérie, MICHELOT-ANTALIK, Alice, Lavergne, Aliénor, Pierre, Monique, Stievenard, Michel, Breda, Nathalie, Damesin, Claire

Publikováno v: Journal of Geophysical Research: Biogeosciences
Journal of Geophysical Research: Biogeosciences, American Geophysical Union, 2018, 123 (4), ⟨10.1002/2017JG004203⟩
Journal of Geophysical Research: Biogeosciences 4 (123), 1145-1160. (2018)
Journal of Geophysical Research: Biogeosciences, American Geophysical Union, 2018, ⟨10.1002/2017JG004203⟩
Journal of Geophysical Research: Biogeosciences, 2018, 123 (4), ⟨10.1002/2017JG004203⟩

Climate reconstructions in temperate Europe have been widely based on oak species. However, other co‐occurring species, largely distributed in Europe, may be used for recording climate variability. In this paper, we documented the inter‐trees and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::e7824d13436278026a53288b9565c0d9
https://hal.archives-ouvertes.fr/hal-01739286/file/Daux_et_al-2018-Journal_of_Geophysical_Research__Biogeosciences.pdf

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Modelling tree ring cellulose δ18O variations in two temperature-sensitive tree species from North and South America

Autor: Lavergne, Aliénor, Gennaretti, Fabio, Risi, Camille, Daux, Valérie, Boucher, Etienne, Savard, Martine M., Naulier, Maud, Villalba, Ricardo, Bégin, Christian, Guiot, Joël

Publikováno v: Climate of the past 11 (13), 1515-1526. (2017)
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

Oxygen isotopes in tree rings (δ18OTR) are widely used to reconstruct past climates. However, the complexity of climatic and biological processes controlling isotopic fractionation is not yet fully understood. Here, we use the MAIDENiso model to dec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::3fa3c7c0351a46db095197c7b5b02f18
http://prodinra.inra.fr/record/418141

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Kernel δ18O reflects changes in apical dominance and plant transpiration in tropical maize

Autor: J. L. Araus, C. Grieder, L. Cabrera-Bosquet, S. Alvarez Prado, Ciro Sanchez

Publikováno v: Journal of Agronomy and Crop Science
Journal of Agronomy and Crop Science, Wiley, 2017, 203 (4), pp.277-285. ⟨10.1111/jac.12196⟩

Modification of source–sink ratios in tropical maize through detasseling is an ancestral agronomical practice used for increasing yields under stressful conditions. However, the mechanisms behind such effect are not well understood given the diffic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2dd58e20213ab7993a2477e824b3b310
https://hal.archives-ouvertes.fr/hal-01607146

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Investigating the impact of light and water status on the exchange of COS, 13CO2, CO18O and H218O from bryophytes

Autor: Gimeno Chocarro, Teresa, Royles, Jessica, Ogée, Jérôme, Jones, Samuel, BURLETT, Régis, West, Jason, Sauze, Joana, Wohl, Steven, Genty, Bernard, Griffiths, Howard, Wingate, Lisa

Publikováno v: European Geosciences Union General Assembly 2016
European Geosciences Union General Assembly 2016, Apr 2016, Vienne, Austria., Geophysical Research Abstracts, 2016, Geophysical Research Abstracts
European Geosciences Union General Assembly 2016, Apr 2016, Vienne, Austria. Geophysical Research Abstracts, 2016, Geophysical Research Abstracts
European Geosciences Union General Assembly 2016, Apr 2016, Vienne, Austria. 2016, Geophysical Research Abstracts

Investigating the impact of light and water status on the exchange of COS, 13CO2, CO18O and H218O from bryophytes. European Geosciences Union General Assembly 2016

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::6dd8a0e32cf86f3f79c9479552bac92f
https://hal.science/hal-01594792

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Developing multi-tracer approaches to constrain soil processes in land surface models

Autor: Wingate, Lisa, Ogée, Jérôme

Publikováno v: 1. Workshop of the International Soil Modeling Consortium (ISMC)
1. Workshop of the International Soil Modeling Consortium (ISMC), Mar 2016, Austin, United States

The net flux of carbon dioxide between soils and the atmosphere is dominated by soil respiration, one of the largest CO2 fluxes in the carbon cycle. Recent studies place the magnitude of this flux somewhere between 68 and 98 Pg C yr-1 at the global s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::d0e43327da79d95bb15d4bcf986ed946
https://hal.archives-ouvertes.fr/hal-01595226

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