Academic literature on the topic 'Cycle du carbone inorganique'
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Journal articles on the topic "Cycle du carbone inorganique":
Niang-Gaye, P., and N. Karpel van Leitner. "Participation des radicaux carbonate à l’oxydation de l’atrazine lors de l’ozonation de solutions aqueuses contenant des ions hydrogénocarbonate." Revue des sciences de l'eau 18, no. 1 (April 12, 2005): 65–86. http://dx.doi.org/10.7202/705550ar.
Paing, J., J. P. Sambuco, R. Costa, A. Rambaud, and B. Picot. "Bilan du carbone dans le lagunage anaérobie appliqué sous climat méditerranéen." Revue des sciences de l'eau 16, no. 3 (April 12, 2005): 357–68. http://dx.doi.org/10.7202/705512ar.
Bailly, Sean. "Un cycle en pur carbone." Pour la Science N° 504 - octobre, no. 10 (January 10, 2019): 9b. http://dx.doi.org/10.3917/pls.504.0009b.
Bard, Édouard, and Richard Sempéré. "Le cycle du carbone dans l’océan." La lettre du Collège de France, no. 40 (September 2, 2015): 38–39. http://dx.doi.org/10.4000/lettre-cdf.2102.
Friedlingstein, Pierre, Laurent BOPP, and Patricia CADULE. "Changement climatique et cycle du carbone." La Météorologie 8, no. 58 (2007): 21. http://dx.doi.org/10.4267/2042/18204.
Pelletier, E., and S. Maheu. "Cinétique d'accumulation et rétention d'espèces du mercure chez l'étoile de mer Leptasterias polaris: une expérience de transfert trophique à long terme." Revue des sciences de l'eau 9, no. 3 (April 12, 2005): 351–64. http://dx.doi.org/10.7202/705257ar.
Schlamadinger, Bernhard, Lorenza Canella, Gregg Marland, and Josef Spitzer. "Bioenergy strategies and the global carbon cycle. / Stratégies bioénergétiques et cycle global du carbone." Sciences Géologiques. Bulletin 50, no. 1 (1997): 157–82. http://dx.doi.org/10.3406/sgeol.1997.1951.
Séférian, Roland, Matthias Rocher, Nicolas Metzl, and Philippe Ciais. "Évolution récente du cycle du carbone planétaire : facteurs humains et naturels." La Météorologie 8, no. 93 (2016): 3. http://dx.doi.org/10.4267/2042/59931.
DOLLÉ, J. B., J. AGABRIEL, J. L. PEYRAUD, P. FAVERDIN, V. MANNEVILLE, C. RAISON, A. GAC, and A. LE GALL. "Les gaz à effet de serre en élevage bovin : évaluation et leviers d'action." INRAE Productions Animales 24, no. 5 (December 8, 2011): 415–32. http://dx.doi.org/10.20870/productions-animales.2011.24.5.3275.
Jonas, KOALA, KAGAMBEGA O. Raymond, and SANOU Lassina. "Distribution des stocks de carbone du sol et de la biomasse racinaire dans un parc agroforestier à Prosopis africana (Guill., et Rich.) Taub au Burkina Faso, Afrique de l’Ouest." Journal of Applied Biosciences 160 (April 30, 2021): 16482–94. http://dx.doi.org/10.35759/jabs.160.5.
Dissertations / Theses on the topic "Cycle du carbone inorganique":
Brunet, Frédéric. "Variations de la signature isotopique (delta)13 C du carbone inorganique dissous dans les rivières et les fleuves." Toulouse 3, 2004. http://www.theses.fr/2004TOU30228.
The scientific objective of this work is to better understand the riverine carbon transfers to the oceans and to identify the different biogeochemical processes controlling these transfers using carbon isotopic signature (d13C). In order to do that, 25 watersheds have been investigated in the world, going from small catchments to large river basins. The results emphasize the major control of CO2 degassing to the atmosphere and of organic carbon oxidation (allochtonous and autochtonous) on the riverine d13CDIC. The average isotopic signature d13CDIC of the inorganic carbon riverine flux into the oceans has been estimated in this study to be -11,8. Finally, a first approach of a numerical model (d-Carb) has been developed to simulate the d13CDIC evolution in rivers
Corbière, Antoine. "Variabilité interannuelle à décennale du cycle océanique du carbone dans le gyre subpolaire de l'Océan Atlantique Nord." Paris 6, 2008. http://www.theses.fr/2008PA066568.
Nkoue-ndondo, Gustave-Raoul. "Le cycle du carbone en domaine tropical humide : exemple du bassin versant forestier du Nyong au sud Cameroun." Toulouse 3, 2008. http://thesesups.ups-tlse.fr/476/.
Spatial and temporal follow ups of carbon contents and its isotopic signature d13C in the Nyong river basin allow on one hand, at a local scale (small experimental catchment of Mengong), to identify the carbon sources, and on the other hand, at a regional scale (Nyong river basin), to understand the biogeochemical processes which control the carbon transformations and exchanges between the different reservoirs during the transfer from upstream to downstream. In these wet tropical ecosystems, the swampy soils of bottom valley low marshes present in surface a thick organic carbon rich horizon (12 to16 %), with isotopic signatures d13C of -29 ‰ in equilibrium with C3 plants (-32 ‰ to -28 ‰). During the rainy season, the mineralization of organic matter and the leaching of swampy areas are responsible of hight DOC contents (until 38 mg / L) in streamwaters, strong pCO2 and impoverished d13CDIC isotopic signatures (-20 ‰ on average). During the dry season, the shrinkage of the swampy zones facilitates the supply of streams by low DOC content (< 1mg / L) and enriched d13CDIC (d13CDIC until 7 ‰%) grounwaters. The carbon flux into the ocean is estimated to 1. 2*106 t C / year, i. E. 6. 24 t C/km2. Year, of which 80 % of DOC, 8 % of POC and 12 % of DIC. During the transfer from upstream to downstream, a DOC decrease of 33 % is observed in relation with oxidation processes. The resulting strong pCO2 facilitate the CO2 degassing towards the atmosphere, estimated for the Nyong river system at 2. 3* 105 t C / year. This CO2 degassing is accompanied by an isotopic enrichment of about 4 ‰. The weathering of silicate minerals by organic acids leads to a surplus of Ca+Mg (0. 5 < Ca+Mg / HCO3- < 2. 2) with regard to a natural weathering pathway by the carbonic acid (Ca+Mg / HCO3- = 0. 5). .
Koffi, Kouakou Urbain. "Distribution des paramètres du carbone et du flux de CO2 à l'interface air - mer dans l'Est de l'Atlantique tropical." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2011. http://tel.archives-ouvertes.fr/tel-00945786.
Riquier, Laurent. "Perturbations des environnements marins, à la limite Frasnien-Famennien (Devonien Terminal) : apport de la géochimie inorganique et du magnétisme des roches." Lille 1, 2005. https://ori-nuxeo.univ-lille1.fr/nuxeo/site/esupversions/f1c218ee-6fde-4031-8185-25754832f1cb.
Ce phénomène d'altération a vraisemblablement été favorisé par un climat particulièrement chaud et humide. Durant l'épisode de dépôt de l'horizon Kellwasser supérieur, l'appauvrissement en oxygène résulterait de la stratification des eaux dans les environnements profonds, due à une diminution de la circulation océanique, causée par un confinement plus important des bassins. Cette stratification a été accrue durant la période de haut niveau marin associée à l'horizon Kelhvasser supérieur. Les eaux anoxiques ont pu se répandre dans les environnements de plates-formes à la faveur de la montée eustatique. La mise en place de conditions anoxiques, voire localement euxiniques, a favorisé la diffusion des nutriments libérés par la reminéralisation de la matière organique. Ces nutriments ont pu rejoindre épisodiquement les eaux de surface, à la faveur d'interruptions temporaires de la stratification des eaux, et ainsi intensifier la productivité primaire. Il est proposé que cette période de stockage accrue de carbone organique dans les sédiments ait fortement perturbé le cycle du carbone à long terme, conduisant, au final, à une chute notable de la pression de CO2 atmosphérique et au refroidissement du climat à la base du Famennien. Ainsi, ces travaux suggèrent que la formation des horizons Kellwasser résulte de la conjonction de divers' phénomènes, comprenant la tectonique s. L. ,l'évolution des végétaux, la physiographie des océans, la productivité marine, le tout en interactions directes et indirectes avec le climat
Duval, Bastien. "Ecodynamics of trace metals and metalloids in Pyrenean lakes in relation to climate change and anthropogenic pressure." Thesis, Pau, 2020. http://www.theses.fr/2020PAUU3046.
The management and conservation of Pyrenean high mountain lakes within the current context of climate change and increasing anthropogenic pressure require detailed knowledge of their biogeochemical functioning. In this doctoral thesis, five sampling campaigns were carried out (2017-2019) in more than 20 alpine lakes. The analysis of water samples allowed us to study the occurrence, the depth profiles, the geographical distribution and the seasonal trends of a large array of physico-chemical and biogeochemical parameters. Specifically, the cycle of carbon dioxide (CO2) and the fate of Potentially Harmful Trace Elements (PHTEs) were investigated. The mercury (Hg) was specially studied through the development of an analytical procedure for the measurement of trace concentrations in natural waters and through biogeochemical investigations on the distribution and the fate of Hg species in the water column, as well as in sediment archives.The new and robust procedure developed in this work to measure the total alkalinity (TA) and the dissolved inorganic carbon (DIC) allowed us to determine the other two parameters of the CO2 system, the pH and the fugacity of CO2 (fCO2). The bedrock characteristics of the watershed appear to be the most important parameters influencing the acid status of the studied lakes. Moreover, obtained fCO2 values indicate that lakes are sources of CO2 for the atmosphere.The measurement of various physico-chemical parameters allowed us to discriminate and classify the studied lakes according to their water geochemistry, highlighting the importance of the trophic status of the lakes, the geological background and the atmospheric inputs. The occurrence, sources and behaviour of the PHTEs were investigated with evidence of a contrast between geological and atmospheric inputs. Intensive monitoring revealed some PHTEs to be highly sensitive to environmental changes such as temperature and redox conditions.Monitoring natural concentrations of total Hg in aquatic systems remains a difficult challenge and there is a need for the development of low cost and easy handling analytical methods. The method for analysis of trace Hg concentrations developed and optimized in this work was successfully operational and exhibits a suitable limit of detection and an excellent reproducibility. Hg speciation results in the water column demonstrated the pristine state and the dynamic of the Pyrenean lakes. The homogeneity in the non-gaseous total Hg concentrations in the studied lakes confirmed the absence of local sources and the potential use of these ecosystems as sentinels of regional to global Hg contamination. While inorganic mercury (iHg) did not show seasonal variations, monomethylmercury(MMHg) was significantly higher in autumn 2018 and dissolved gaseous mercury (DGM) varied strongly within and among lakes. In-situ experiments confirmed the conditions that promote Hg methylation (stratified anoxic waters), demethylation and photoreduction (intense UV light).The historical Hg record in sediment archives highlighted temporal trends in Hg accumulation rates (HgARs) with a progressive increase since the 16th Century and the industrialization, mirroring the Hg production in Almadén mines (Southern Spain). Besides, Hg stable isotopes allow the identification of distinct anthropogenic sources as well as past climate variability.Overall, environmental changes in lake ecosystems, induced by either climatic conditions (temperature, light intensity) or anthropogenic pressure (atmospheric inputs, eutrophication, atmospheric CO2) are likely to produce significant impacts among CO2, specific PHTEs and Hg biogeochemical cycles in mountainous ecosystems
Furla, Paola. "Mécanismes de transport de carbone inorganique dans l'association symbiotique Cnidaire-dinoflagélle." Aix-Marseille 2, 1999. http://www.theses.fr/1999AIX22095.
Granier, Jean-Marie. "Transport du carbone inorganique en solution expérimentation et modélisation à différentes échelles... /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37614037w.
Ndiaye, Mbalo. "Transfert de CO2 et stratégie d' apport du carbone inorganique en photobioréacteur." Thesis, Nantes, 2016. http://www.theses.fr/2016NANT4042/document.
Photobioreactors (PBR) applications for photosynthetic microorganisms cultivation, are varied and promising. Optimazing culture conditions is necessary in order to ensure economically viable PBR operation by ensuring adequate CO2 intake for all microorganisms at any point of the reactor while limiting losses by degassing. This study more specifically focuces on CO2 mass transfer from gas phase to liquid phase. Computational fluid dynamics CFD is used to achieve a fine analysis of the interactions that take place in these systems in order to have a better understanding of the phenomena governing their operation and predict the spatial and temporal distribution of the dissolved species and gas/liquid mass transfer performances. The numerical study of gas/liquid transfer using dynamic method with O2 and with CO2 shows that apparent kLa values obtained with O2 is higher. Unlike oxygen, CO2 bubbles depleted significantly during their rising in the liquid which results in a significant decrease of the exchange potential and therefore the apparent kLa. Thus photobioreactor scale-up with kLa of CO2 estimated from dynamic method with O2 could lead to an overestimation of the gas/liquid mass transfer capabilities at large scale. Moreover, PBR simulation with microalgae using CFD code shows that it is possible to bring dissolved CO2 sufficiently and homogeneously in a 100 L airlift PBR. In addition, conditions to control pH are determined for moderate CO2 concentrations in the gas phase
Beuf, Laurent. "Recherche des gènes impliqués dans l'assimilation du carbone inorganique chez Synechocystis PCC 6803." Aix-Marseille 2, 1993. http://www.theses.fr/1993AIX22078.
Books on the topic "Cycle du carbone inorganique":
International Boreal Forest Research Association. Conference. The role of boreal forests and forestry in the global carbon budget: Proceedings. Edited by Shaw Cindy 1956-, Apps Michael J, and Northern Forestry Centre (Canada). Edmonton: Canadian Forest Service, Northern Forestry Centre, 2002.
Smyth, C. E. Decreasing uncertainty in CBM-CFS3 estimates of forest soil carbon sources and sinks through use of long-term data from the Canadian Intersite Decomposition Experiment. Victoria, B.C: Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, 2010.
Jupin, Henri. Le cycle du carbone. Hachette supérieur, 1996.
1958-, Kurz Werner Alexander, Canada-British Columbia Partnership Agreement on Forest Resource Development: FRDA II., Canadian Forest Service, and British Columbia. Ministry of Forests., eds. The carbon budget of British Columbia's forests, 1920-1989: Preliminary analysis and recommendations for refinements. Victoria, B.C: Canadian Forest Service, 1996.
L, Gholz Henry, Linder Sune, and McMurtrie R. E, eds. Environmental constraints on the structure and productivity of pine forest ecosystems: A comparative analysis. Copenhagen, Denmark: Munksgaard International, 1994.
Roy, Jacques, and Eric Garnier. A Whole Plant Perspective on Carbon-Nitrogen Interactions. Balogh Scientific Books, 1994.
Book chapters on the topic "Cycle du carbone inorganique":
"4.4 Le cycle du carbone." In Une introduction à la dynamique des océans et du climat, 397–432. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2390-1-005.
"4.4 Le cycle du carbone." In Une introduction à la dynamique des océans et du climat, 397–432. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2390-1.c005.
"Chapitre 8. Les gaz à effet de serre, le cycle du carbone et Gaïa." In L'homme est-il responsable du réchauffement climatique ?, 175–210. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0345-3-010.
"Chapitre 8. Les gaz à effet de serre, le cycle du carbone et Gaïa." In L'homme est-il responsable du réchauffement climatique ?, 175–210. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0345-3.c010.