Search results for "CO2"

showing 10 items of 402 documents

Mesure des émissions de CO2 en milieu urbain : étude du flux et de ses variations à l’aide des isotopes du carbone.

2013

7 pages; International audience; Dans la ville de Dijon, les émissions de CO2 ont été mesurées. Les variations de la concentration atmosphériquesen CO2 et de la signature isotopiques du CO2 atmosphérique ont permis de mettre en évidence un dôme urbain au dessus dela ville. Ce dôme présente un double mécanisme lié au trafic et à la respiration du sol. Le niveau de base des dômes sesitue sur une droite de mélange (ou une courbe) ayant pour origine les valeurs de la concentration (370 ppm) et du d13C (-8‰) mesurées en zone rurale ainsi que la droite de mélange du trafic. La concentration et la signature isotopique dépendaussi de la respiration du sol. D’autre paramètre comme la température et …

[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/GeochemistryCO2 atmosphérique[ SDU.STU.GC ] Sciences of the Universe [physics]/Earth Sciences/Geochemistry
researchProduct

Phenotypic and genotypic characterization of extensive dermal melanocytosis: co24

2016

International audience

[SDV.MHEP] Life Sciences [q-bio]/Human health and pathology[ SDV.MHEP ] Life Sciences [q-bio]/Human health and pathologyCO24melanocytosisComputingMilieux_MISCELLANEOUS
researchProduct

Sol et changement climatique

2009

[SDV] Life Sciences [q-bio][ SDV ] Life Sciences [q-bio]gaz à effet de serre évolution des sols[SDV]Life Sciences [q-bio]stock organiqueCO2sols
researchProduct

Estimer le volume de la microflore sera bientôt possible

1998

[SDV] Life Sciences [q-bio][SDE] Environmental Sciences[SDV]Life Sciences [q-bio][SDE]Environmental SciencesCO2
researchProduct

The influence of climate change on N-cycling microorganisms in soil

2011

International audience

[SDV] Life Sciences [q-bio][SDE] Environmental Sciences[SDV]Life Sciences [q-bio][SDE]Environmental SciencesCO2ComputingMilieux_MISCELLANEOUSINFLUENCE CLIMATIQUE
researchProduct

Microbial community dynamics induced by rewetting dry soil: summer precipitation matters

2015

The massive soil CO2 efflux associated with rewetting dry soils after the dry summer period significantly contributes to the annual carbon budget of Mediterranean grasslands. Rapid reactivation of soil heterotrophic activity and available carbon are both required to fuel the CO2 pulse. Better understanding of the effects of altered summer precipitation on the metabolic state of indigenous microorganisms may be important in predicting future changes in carbon cycling. We investigated the effects of a controlled rewetting event on the soil CO2 efflux pulse and on the present (DNA-based) and potentially active (rRNA-based) soil bacterial and fungal communities in intact soil cores previously s…

[SDV] Life Sciences [q-bio][SDE] Environmental Sciences[SDV]Life Sciences [q-bio][SDE]Environmental Sciences[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal BiologyrRNAMediterranean grasslandsoil CO2 effluxrpoBbirch effect
researchProduct

Wet-up response of the microbial community is shaped by soil dry-down patterns

2015

Background/Question/Methods The massive soil CO2 efflux associated with rewetting dry soils after the dry summer period significantly contributes to the annual carbon budget of Mediterranean grasslands. Rapid reactivation of soil heterotrophic activity and available carbon are both required to fuel the CO2 pulse. Better understanding of the effects of altered summer precipitation on the metabolic state of indigenous microorganisms may be important in predicting future changes in carbon cycling. We investigated the effects of a controlled rewetting event on the soil CO2efflux pulse and on the present (DNA-based) and potentially active (rRNA-based) soil bacterial and fungal communities in int…

[SDV] Life Sciences [q-bio][SDE] Environmental Sciences[SDV]Life Sciences [q-bio][SDE]Environmental SciencesrDNA[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal BiologyBirch effectrRNAMediterranean grasslandsoil CO2 effluxrpoB
researchProduct

Changing summer precipitation pattern alters microbial community response to fall wet-up in a Mediterranean soil

2014

The large soil CO2 efflux associated with rewetting dry soils after the dry summer period significantly contributes to the annual carbon budget of Mediterranean grasslands. Rapid reactivation of soil heterotrophic activity and a pulse of available carbon are both required to fuel the CO2 pulse. Better understanding of the effects of altered summer precipitation on the metabolic state of indigenous microorganisms may be important in predicting future changes in carbon cycling. Here, we investigated the effects of a controlled rewetting event on the soil CO2 efflux pulse and on the present (DNA-based) and potentially active (rRNA-based) soil bacterial and fungal communities in intact soil cor…

[SDV] Life Sciences [q-bio][SDE] Environmental Sciences[SDV]Life Sciences [q-bio][SDE]Environmental Sciencessoil CO2 efflux;rRNA;rDNA;Birch effectrDNA[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal BiologyBirch effectrRNAsoil CO2 efflux
researchProduct

Isotopic Differentiation (13C) of Dissolved Organic Carbon and CO2 During Organic Matter Degradation in Forest Soils: Influence of Vegetation

2008

International audience

[SDV] Life Sciences [q-bio][SDE] Environmental Sciencesisotopic differentiation[SDV]Life Sciences [q-bio][SDE]Environmental SciencesCO213Cforest soildissolved organic carbonComputingMilieux_MISCELLANEOUSorganic matter degradation
researchProduct

Carbon storage in soils by ancient and modern wheat varieties

2022

Les émissions anthropiques de gaz à effet de serre sont le principal moteur du changement climatique. Le plan Climat, issu de la COP 21 tenue à Paris en 2015, vise à atteindre la neutralité carbone à l'horizon 2050. Pour atteindre cette neutralité carbone, les gaz à effet de serre doivent d'abord être stabilisés, puis fortement réduits au cours du siècle prochain. Dans cette dynamique, l'initiative « 4 pour 1000 » fixe comme objectif d'atteindre un taux de croissance annuel du stock de carbone dans les sols de 0,4% par an. Ce stockage additionnel devrait compenser les émissions de CO2 dans l'atmosphère liée aux activités humaines. Les sols agricoles sont identifiés comme un compartiment de …

[SDV] Life Sciences [q-bio]système racinairesoil organic carbon storageémissions de CO2contexte pédologiquevariétés de blé anciens et modernesrendementroot systemstockage du carbone organique du solancient and modern wheat varietiesCO2 emissionspedological contextyield components
researchProduct