Search results for " CO2."

showing 10 items of 160 documents

Novel Imidazolium Based Catalyst for the Chemical Fixation of Carbon Dioxide

2015

Conversion of CO2 catalysis Polyhedral Oligomeric Silsesquioxane Cyclic Crabonates
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Anomalous soil CO 2 degassing in relation to faults and eruptive fissures on Mount Etna (Sicily, Italy)

1998

The relationships between soil gas emissions and both tectonic and volcano-tectonic structures on Mt. Etna have been studied. The investigation consisted of soil CO2 flux measurements along traverses orthogonal to the main faults and eruptive fissures of the volcano. Anomalous levels of soil degassing were found mainly in coincidence with faults, whereas only 49% of the eruptive fissures were found to produce elevated CO2 soil fluxes. This result suggests that only zones of strain are able to channel deep gases to the surface. According to this hypothesis, several previously unknown structures are suggested. Based on our geochemical data, new structural maps of different areas of Etna are p…

Current (stream)Tectonicsgeographygeography.geographical_feature_categoryVolcanoGeochemistry and PetrologySoil gasSedimentologyPetrologyVolcanic unrestGeomorphologyGeologySoil co2 fluxBulletin of Volcanology
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Calcification is not the Achilles'heel of cold-water corals in an acidifying ocean

2015

Ocean acidification is thought to be a major threat to coral reefs: laboratory evidence and CO2 seep research has shown adverse effects on many coral species, although a few are resilient. There are concerns that cold-water corals are even more vulnerable as they live in areas where aragonite saturation (Omega ara) is lower than in the tropics and is falling rapidly due to CO2 emissions. Here, we provide laboratory evidence that net (gross calcification minus dissolution) and gross calcification rates of three common cold-water corals, Caryophyllia smithii, Dendrophyllia cornigera, and Desmophyllum dianthus, are not affected by pCO2 levels expected for 2100 (pCO2 1058 µatm, Omega ara 1.29),…

Dissolution rateOcean Acidification International Coordination Centre (OA-ICC)TemperateIdentificationSalinityBicarbonate ion standard deviationinorganicAlkalinity total standard deviationAlkalinityExperimentTemperature waterCarbon inorganic dissolvedCalculated using seacarb after Nisumaa et al 2010Aragonite saturation stateRespiration rate oxygenAlkalinity totaltotalDesmophyllum dianthuspHRespirationTemperatureCalcification rate of calcium carbonatedissolvedLaboratory experimentCarbonate ionDeep seaPartial pressure of carbon dioxide (water) at sea surface temperature (wet air)Field experimentCarbon dioxide standard deviationTemperature water standard deviationContainers and aquaria 20 1000 L or 1 m 2Respiration rateEarth System ResearchContainers and aquaria (20-1000 L or &lt; 1 m**2)standard deviationCalcification/DissolutionPotentiometric titrationCalcite saturation statePotentiometricwaterPartial pressure of carbon dioxideCaryophyllia smithiiContainers and aquaria (20-1000 L or < 1 m**2)Dendrophyllia cornigeraFigureAragonite saturation state standard deviationBenthosCnidariaOcean Acidification International Coordination Centre OA ICCMediterranean SeaAnimaliaBicarbonate ionCalculated using seacarb after Nisumaa et al. (2010)SpeciesCalculated using CO2SYSfungiEvent labelDeep-seaPartial pressure of carbon dioxide standard deviationCarbonate system computation flagpH standard deviationCarbonate ion standard deviationbiochemical phenomena metabolism and nutritionFugacity of carbon dioxide (water) at sea surface temperature (wet air)CarbonTreatmentPartial pressure of carbon dioxide water at sea surface temperature wet airCarbon dioxideSingle speciesCalcification DissolutionFugacity of carbon dioxide water at sea surface temperature wet airBenthic animalsoxygen
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Comment réduire les émissions de CO2 du transport de fret en France ? Evaluation socio-économique de trois politiques publiques

2018

France must implement voluntarist policies in order to reduce CO2 emissions, which raises questions regarding the effectiveness of competing options and their costs, for both public finances and society. This paper estimates abatement costs of one ton of CO2 from three scenarios aimed at softening the environmental impacts of freight moved by trucks. Hybrid trucks may generate large CO2 savings (5.7 Mt/year in 2030), at a moderate discounted abatement cost (88 €/t). The option based on natural gas for vehicles leads to a similar abatement cost and to lower environmental gains (3.2 Mt/year in 2030). Whilst inducing small CO2 savings (0.2 Mt/year in 2030), megatrucks present a negative discou…

ETUDE D&aposPOIDS LOURDEMISSIONS DE CO2POLITIQUEABATTEMENTCALCUL ECONOMIQUE[SDE.ES] Environmental Sciences/Environmental and SocietyCALCUL SOCIO ECONOMIQUETRANSPORT DE MARCHANDISES[SDE.ES]Environmental Sciences/Environmental and SocietyCOUT D&aposTRANSPORT DE MARCHANDISEIMPACT (ENVIRONNEMENT)
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Impact of geogenic degassing on C-isotopic composition of dissolved carbon in karst systems of Greece

2022

The Earth C-cycle is complex, where endogenic and exogenic sources are interconnected, operating in a multiple spatial and temporal scale (Lee et al., 2019). Non-volcanic CO2 degassing from active tectonic structures is one of the less defined components of this cycle (Frondini et al., 2019). Carbon mass-balance (Chiodini et al., 2000) is a useful tool to quantify the geogenic carbon output from regional karst hydrosystems. This approach has been demonstrated for central Italy and may be valid also for Greece, due to the similar geodynamic settings. Deep degassing in Greece has been ascertained mainly at hydrothermal and volcanic areas, but the impact of geogenic CO2 released by active tect…

Earth C-cycle CO2 degassing karst systems.Settore GEO/08 - Geochimica E Vulcanologia
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Carbon dioxide diffuse emission and thermal energy release from hydrothermal systems at Copahue-Caviahue Volcanic Complex (Argentina)

2015

Fil: Chiodini, Giovanni. Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna. Bologna, Italia. Fil: Cardellini, Carlo. Università degli Studi di Perugia, Dipartimento di Fisica e Geologia. Perugia, Italy. Fil: Lamberti, María C. Universidad de Buenos Aires. Instituto de Estudios Andinos. Buenos Aires, Argentina. Fil: Agusto, Mariano. Universidad de Buenos Aires. Instituto de Estudios Andinos. Buenos Aires, Argentina. Fil: Caselli, Alberto Tomás Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro. Argentina. Fil: Liccioli, Caterina. Universidad de Buenos Aires. Instituto de Estudios Andinos. Buenos Aires, Argentina. Fil: Tambure…

Earth scienceGeochemistrychemistry.chemical_elementThermal energyCO2 DIFFUSETHERMAL ENERGYHydrothermal circulationCiencias de la Tierra y relacionadas con el Medio AmbienteCopahue Volcano CO2 Diffuse Degasingchemistry.chemical_compoundVulcanologíaGeochemistry and PetrologyCalderaCaviahue Calderageographygeography.geographical_feature_categorybusiness.industryFumaroleCopahue Volcano CO2 diffuse degasingSettore GEO/08 - Geochimica E VulcanologiaGeophysicschemistryVolcanoCAVIAHUE CALDERASoil waterCarbon dioxideCaviahue Caldera Copahue Volcano CO2 diffuse degasing Thermal energyCOPAHUE VOLCANObusinessCO2 fluxCarbonThermal energyGeologyCIENCIAS NATURALES Y EXACTAS
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The environmental Kuznets curve within European countries and sectors: greenhouse emission, production function and technology

2018

Based on the environmental Kuznets curve (EKC) hypothesis and the technological change and the environment literature, our original contribution consists in analysing within the decomposition model the direct and indirect influence of technological change as well as the energy mix on CO2 emissions. Focusing on the dirtiest sectors of 25 EU countries in the period 1997-2005 and considering the endogeneity issue, we estimate an adjusted EKC relationship comparing a single equation model (univariate model) with a simultaneous equations system (bivariate model). Following Lopez (J Environ Econ Manag 27:163-184, 1994), a second equation is introduced where per capita income is a positive functio…

Economics and EconometricsSociology and Political ScienceR&ampScale effect020209 energyD expenditureAir pollution202 engineering and technologyGross domestic productPhysical capitalKuznets curveemissionTechnique effect0202 electrical engineering electronic engineering information engineeringEconometricsEconomicsAir Pollution Environmental Kuznets curve; Technological progress; Structural change; Environmental policy sustainable development; CO2 emissionComposition effectProductivityInput/energy mix effectTechnological changeSimultaneous equations modelCOEconomyjel:Q55Greenhouse gasEnvironmental Kuznets curveSettore SECS-S/03 - Statistica Economicajel:Q53EU countrieEnergy sourceFinance
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- STRATEGIC PIGOUVIAN TAXATION, STOCK EXTERNALITIES AND POLLUTING NON-RENEWABLE RESOURCES

2001

This paper extends Wirl and Dockner¿s (1995) model designed to analyze the long-term bilateral interdependence between a resource exporting cartel and a coalition of resource importing country governments. Firstly, depletion effects are introduced into the analysis of the intertemporal properties of a pigouvian tax. Secondly, the feedback Stackelberg equilibria are computed. The results show that the dynamics of the tax depends critically on the level of the marginal environmental damage. Moreover, they also show that the tax defined by the Markov-perfect Nash equilibrium is a neutral pigouvian tax in the sense that it only corrects the market inefficiency caused by the stock externality. H…

Economics and Econometricsjel:D62Welfare economicsjel:F02jel:H23Externalidad de stock imposición pigouviana impuesto sobre las emisiones de CO2 Stock externality pigouvian taxation carbon taxMicroeconomicsMarkov perfect nash equilibriumEconomicsjel:Q48FinanceStock (geology)Non-renewable resourceExternalityjel:Q28
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Two alternate means to internalize companies' CO2 emissions: Carbon Value Added and Profitability

2022

Economie industrielleEmissions CO2 des entreprisesValeur carbonne[SHS.GESTION] Humanities and Social Sciences/Business administration
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Ocean acidification affects fish spawning but not paternity at CO2 seeps

2016

Fish exhibit impaired sensory function and altered behaviour at levels of ocean acidification expected to occur owing to anthropogenic carbon dioxide emissions during this century. We provide the first evidence of the effects of ocean acidification on reproductive behaviour of fish in the wild. Satellite and sneaker male ocellated wrasse (Symphodus ocellatus) compete to fertilize eggs guarded by dominant nesting males. Key mating behaviours such as dominant male courtship and nest defence did not differ between sites with ambient versus elevated CO2 concentrations. Dominant males did, however, experience significantly lower rates of pair spawning at elevated CO2 levels. Despite the higher r…

Eggs standard errorOcean Acidification International Coordination Centre (OA-ICC)TemperateRegistration number of speciesIdentificationSalinityEggsinorganicAlkalinityExperimentNumber standard errorDominant male paternityTemperature waterCarbon inorganic dissolvedNumber of individualsCalculated using seacarb after Nisumaa et al 2010Number of spawning events standard errorAragonite saturation stateFish standard lengthChordataAlkalinity totalSalinity standard errortotalCO2 ventReplicatesCourtship standard errorpHPelagosReproductionSymphodus ocellatusTemperatureNumberPartial pressure of carbon dioxide (water) at sea surface temperature (wet air) standard errordissolvedCarbonate ionPartial pressure of carbon dioxide (water) at sea surface temperature (wet air)standard errorIndividuals standard errorEarth System ResearchField observationFOS: Medical biotechnologyUniform resource locator link to referencePotentiometric titrationCalcite saturation stateLocationPotentiometricwaterNumber of spawning eventsAgeUniform resource locator/link to referenceOcean Acidification International Coordination Centre OA ICCMediterranean SeaAnimaliaEggs areaBehaviourTypeBicarbonate ionNektonEggs area standard errorTemperature water standard errorCalculated using seacarb after Nisumaa et al. (2010)SpeciespH standard errorWet massDominant male paternity standard errorCalculated using CO2SYSEvent labelIndividualsCourtshipCarbonate system computation flagstandard lengthFugacity of carbon dioxide (water) at sea surface temperature (wet air)CarbonTreatmentPartial pressure of carbon dioxide water at sea surface temperature wet airFishCarbon dioxideSingle speciesFugacity of carbon dioxide water at sea surface temperature wet airCoast and continental shelf
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