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Bibliografias temáticas / Atmospheric lifetime

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Literatura científica selecionada sobre o tema "Atmospheric lifetime"

Autor: Grafiati

Publicado: 31 de agosto de 2024

Última modificação: 31 de julho de 2025

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Artigos de revistas sobre o assunto "Atmospheric lifetime"

1

Sonnemann, G. R., and M. Grygalashvyly. "Effective CO<sub>2</sub> lifetime and future CO<sub>2</sub> levels based on fit function." Annales Geophysicae 31, no. 9 (2013): 1591–96. http://dx.doi.org/10.5194/angeo-31-1591-2013.

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Abstract. The estimated global CO2 emission rates and the measured atmospheric CO2 concentrations show that only a certain share of the emitted CO2 accumulates in the atmosphere. For given atmospheric emissions of CO2, the effective lifetime determines its accumulation in the atmosphere and, consequently, its impact on the future global warming. We found that on average the inferred effective lifetime of CO2 decreases as its atmospheric concentration increases, reducing the rate of its accumulation in the atmosphere. We derived a power function that fits the varying lifetimes. Based on this fi

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2

Roelofs, G. J. "A steady-state analysis of the temperature responses of water vapor and aerosol lifetimes." Atmospheric Chemistry and Physics 13, no. 16 (2013): 8245–54. http://dx.doi.org/10.5194/acp-13-8245-2013.

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Abstract. The dominant removal mechanism of soluble aerosol is wet deposition. The atmospheric lifetime of aerosol, relevant for aerosol radiative forcing, is therefore coupled to the atmospheric cycling time of water vapor. This study investigates the coupling between water vapor and aerosol lifetimes in a well-mixed atmosphere. Based on a steady-state study by Pruppacher and Jaenicke (1995) we describe the coupling in terms of the processing efficiency of air by clouds and the efficiencies of water vapor condensation, of aerosol activation, and of the transfer from cloud water to precipitati

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Takahashi, K., T. Nakayama, Y. Matsumi, et al. "Atmospheric lifetime of SF5CF3." Geophysical Research Letters 29, no. 15 (2002): 7–1. http://dx.doi.org/10.1029/2002gl015356.

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4

Hoffmann, L., C. M. Hoppe, R. Müller, et al. "Stratospheric lifetime ratio of CFC-11 and CFC-12 from satellite and model climatologies." Atmospheric Chemistry and Physics 14, no. 22 (2014): 12479–97. http://dx.doi.org/10.5194/acp-14-12479-2014.

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Abstract. Chlorofluorocarbons (CFCs) play a key role in stratospheric ozone loss and are strong infrared absorbers that contribute to global warming. The stratospheric lifetimes of CFCs are a measure of their stratospheric loss rates that are needed to determine global warming and ozone depletion potentials. We applied the tracer–tracer correlation approach to zonal mean climatologies from satellite measurements and model data to assess the lifetimes of CFCl3 (CFC-11) and CF2Cl2 (CFC-12). We present estimates of the CFC-11/CFC-12 lifetime ratio and the absolute lifetime of CFC-12, based on a r

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Sodemann, Harald. "Beyond Turnover Time: Constraining the Lifetime Distribution of Water Vapor from Simple and Complex Approaches." Journal of the Atmospheric Sciences 77, no. 2 (2020): 413–33. http://dx.doi.org/10.1175/jas-d-18-0336.1.

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Abstract The time water vapor spends in the atmosphere from evaporation to precipitation, termed here the water vapor lifetime, is of fundamental relevance for characterizing the water cycle, for the turnover of mass and energy, causes of precipitation extremes, and the recycling of precipitation over land. While the global average lifetime of water vapor is commonly considered as about 8–10 days, recent work indicates that the distribution of water vapor lifetimes is highly skewed, and that a large part of the water vapor could have average lifetimes of about 4–5 days. Besides calling for scr

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Patten, K. O., and D. J. Wuebbles. "Atmospheric lifetimes and ozone depletion potentials of trans-1-chloro-3,3,3-trifluoropropylene and trans-1,2-dichloroethylene in a three-dimensional model." Atmospheric Chemistry and Physics Discussions 10, no. 7 (2010): 16637–57. http://dx.doi.org/10.5194/acpd-10-16637-2010.

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Abstract. The chloroalkenes trans-1-chloro-3,3,3-trifluoropropylene (tCFP) and trans-1,2-dichloroethylene (tDCE) have been proposed as candidate replacements for other compounds in current use that cause concerns regarding potential environmental effects including destruction of stratospheric ozone. Because tCFP and tDCE contain chlorine atoms, the effects of these short-lived compounds on stratospheric ozone must be established. In this study, we derive the atmospheric lifetimes and Ozone Depletion Potentials (ODPs) for tCFP and for tDCE assuming emissions from land surfaces at latitudes 30°

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Roelofs, G. J. "Aerosol lifetime and climate change." Atmospheric Chemistry and Physics Discussions 12, no. 7 (2012): 16493–514. http://dx.doi.org/10.5194/acpd-12-16493-2012.

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Abstract. The dominant removal mechanism for atmospheric aerosol is activation of particles to cloud droplets and subsequent wet deposition in precipitation. The atmospheric lifetime of aerosol is thus closely coupled to the atmospheric cycling time of water vapor. Changes of hydrological cycle characteristics resulting from climate change therefore directly affect aerosol lifetime, and thus the radiative forcing exerted by aerosol. This study expresses the coupling between water vapor and aerosol lifetimes and their temperature sensitivities in fundamental equations and in terms of the effici

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Patten, K. O., and D. J. Wuebbles. "Atmospheric lifetimes and Ozone Depletion Potentials of trans-1-chloro-3,3,3-trifluoropropylene and trans-1,2-dichloroethylene in a three-dimensional model." Atmospheric Chemistry and Physics 10, no. 22 (2010): 10867–74. http://dx.doi.org/10.5194/acp-10-10867-2010.

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Abstract. The chloroalkenes trans-1-chloro-3,3,3-trifluoropropylene (tCFP) and trans-1,2-dichloroethylene (tDCE) have been proposed as candidate replacements for other compounds in current use that cause concerns regarding potential environmental effects including destruction of stratospheric ozone. Because tCFP and tDCE contain chlorine atoms, the effects of these short-lived compounds on stratospheric ozone must be established. In this study, we derive the atmospheric lifetimes and Ozone Depletion Potentials (ODPs) for tCFP and for tDCE assuming emissions from land surfaces at latitudes 30°

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Brown, A. T., C. M. Volk, M. R. Schoeberl, C. D. Boone, and P. F. Bernath. "Stratospheric lifetimes of CFC-12, CCl<sub>4</sub>, CH<sub>4</sub>, CH<sub>3</sub>Cl and N<sub>2</sub>O from measurements made by the Atmospheric Chemistry Experiment-Fourier Transform Spectrometer (ACE-FTS)." Atmospheric Chemistry and Physics Discussions 13, no. 2 (2013): 4221–87. http://dx.doi.org/10.5194/acpd-13-4221-2013.

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Abstract. Long lived halogen-containing compounds are important atmospheric constituents since they can act both as a source of chlorine radicals, which go on to catalyse ozone loss, and as powerful greenhouse gases. The long term impact of these species on the ozone layer is dependent on their stratospheric lifetimes. Using observations from the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) we present calculations of the stratospheric lifetimes of CFC-12, CCl4, CH4, CH3Cl and N2O. The lifetimes were calculated using the slope of the tracer-tracer correlation of the

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10

Kepros, John G., and Greg Davidson. "Atmospheric Heating and Hubble's Lifetime." Physics Today 47, no. 1 (1994): 68–69. http://dx.doi.org/10.1063/1.2808393.

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Mais fontes

Teses / dissertações sobre o assunto "Atmospheric lifetime"

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Kennett, Elizabeth Jane. "Lifetime and variability of atmospheric water vapour." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425367.

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Min, Flora. "Influence of recent Asian SO₂ and Asian NOx̳ emissions change (2001 to 2010) on particulate matter : shifts in Asian sulfate enhancement over US surface, major production pathway, and lifetime." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/95565.

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Thesis: S.M. in Atmospheric Science, Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2014.<br>In title on title-page. double-underscored "x" appears as subscript. Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 42-49).<br>A 3-D chemical transport model with coupled oxidant-aerosol chemistry (GEOSChem) is used to analyze the influence of recent (2001 to 2010) growth in Asian NOx and Asian SO 2 emission on transpacific transport of Asian particulate matter, especially sulfate, by quantifying and analyzing the de

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Granneman, Jennifer E. "Evaluation of trace-metal and isotopic records as techniques for tracking lifetime movement patterns in fishes." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7675.

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The focus of this work was on the use of otolith microchemistry and fish eye lens chemical profiles to measure fish movement and provided indirect support for the use of otolith microchemistry to examine exposure to crude oil. Chapter 1 provides an introduction to the applications of otolith microchemistry and eye lens isotopic profiles. In the second chapter, which examined associations between metal exposure and lesion formation in fishes collected after the Deepwater Horizon (DWH) oil spill, I did not observe any change in oil-associated metal concentrations in otoliths coinciding with th

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Zogka, Antonia. "Atmospheric degradation of a series of methoxy and ethoxy acetates and n-pentyl acetate." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2071/document.

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Dans le cadre du projet DISPATMO (étude de prévision des risques de pollution liés à la dispersion atmosphérique de produits chimiques), des études de risques liés aux incendies et explosions dus aux produits chimiques ont été menées. L’objectif de cette thèse était de réaliser une étude cinétique et mécanistique approfondie afin de déterminer la dégradation en phase gazeuse de l'un des principaux constituants du solvant Tiflex, acétate de 1-méthoxy-2-propyle (MPA), par les radicaux OH et les atomes de Cl. En outre, les constantes de vitesse de réaction de OH et Cl avec une série d' acétates d

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Zhang, Bochun. "Failure Mechanism Analysis and Life Prediction Based on Atmospheric Plasma-Sprayed and Electron Beam-Physical Vapor Deposition Thermal Barrier Coatings." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/35709.

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Using experimentally measured temperature-process-dependent model parameters, the failure analysis and life prediction were conducted for Atmospheric Plasma Sprayed Thermal Barrier Coatings (APS-TBCs) and electron beam physical vapor deposition thermal barrier coatings (EB-PVD TBCs) with Pt-modified -NiAl bond coats deposited on Ni-base single crystal superalloys. For APS-TBC system, a residual stress model for the top coat of APS-TBC was proposed and then applied to life prediction. The capability of the life model was demonstrated using temperature-dependent model parameters. Using existing

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Moe, Brian J. "Estimating Growth and Mortality in Elasmobranchs: Are we doing it correctly?" NSUWorks, 2015. http://nsuworks.nova.edu/occ_stuetd/42.

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The instantaneous mortality rate (M) is an important parameter in elasmobranch management and conservation, but is difficult to estimate directly. Thus, indirect estimates based on relatively easily obtained life history parameters are commonly used. Many indirect methods incorporate one or more parameters from the von Bertalanffy growth model (VBGM), which is often criticized for its inability to describe changes in growth associated with maturity. The Lester growth model (LGM) is a biphasic alternative to the VBGM that incorporates trade-offs between reproduction, growth, and survival, and m

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Gurney, Kevin Robert. "The model lifetimes, band intensities, growth scenarios and atmospheric implications of substitute chlorofluorocarbons." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/52912.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1990.<br>Includes bibliographical references (leaves 31-32).<br>by Kevin Robert Gurney.<br>M.S.

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Brown, Alex. "The lifetimes and time-series of chlorine and fluorine containing gases from the atmospheric chemistry experiment." Thesis, University of York, 2013. http://etheses.whiterose.ac.uk/5484/.

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The research presented in this thesis is focused around environmentally important chlorine- and fluorine-containing species. The work in this thesis was carried out using data from the ACE-FTS. This work is divided into four principle areas of research. The changes in the volume mixing ratio (VMR) of CCl4, CF4, CFC-11, CFC-12, CFC-113, CH3Cl, ClONO2, COF2, COCl2, COClF, HCFC-22, HCFC-141b, HCFC-142b, HCl, HF and SF6 between 2004 and 2010 in the tropics are presented. In addition to calculating the changes in the VMR of these species during this time, this work allowed a quick comparison betwee

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9

Woodcock, Kenneth Reginald Simon. "The chemistry of Fe+ and Fe-containing ions with atmospheric gases : implications for the lifetimes of sporadic E layers." Thesis, University of East Anglia, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435299.

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Fakih, Mariam. "Réactivité atmosphérique des principaux produits d'oxydation de première génération des monoterpènes." Electronic Thesis or Diss., Reims, 2024. http://www.theses.fr/2024REIMS010.

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Les monoterpènes sont des composés organiques volatils biogéniques (COVB) largement émis dans l'atmosphère par les forêts et les cultures végétales, représentant ainsi des acteurs significatifs de la chimie atmosphérique. Leur réactivité importante envers les oxydants atmosphériques a fait sujet de plusieurs études dans la littérature. Cependant, leurs produits de première génération d’oxydation sont moins évalués et pourraient expliquer en partie la réactivité manquante ainsi que la sous-estimation de la formation des AOS par les modèles. Dans ce contexte, cette étude vise à comprendre la réa

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Livros sobre o assunto "Atmospheric lifetime"

1

United States. National Aeronautics and Space Administration., ed. The atmospheric lifetime experiment and the global atmospheric gas experiment (ALE/GAGE): Final report. National Aeronautics and Space Administration, 1995.

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2

Chance, Kelly, and Randall V. Martin. Line Shapes. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199662104.003.0006.

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Line shapes describe how absorption and emission are spectrally distributed around the line positions formed by rotational, vibrational, and electronic transitions. Line shapes arise from the different processes that spectrally broaden the absorption and emission of radiation. Optical thickness and equivalent width are shown to be fundamentally related to line shape. The fundamental line shape functions for atmospheres including the Gaussian line shape due to molecular motion and the Lorentzian line shape from lifetime broadening, including collision (pressure) broadening are described. Their

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3

Infrared radiative forcing and atmospheric lifetimes of trace species based on observations from UARS. National Aeronautics and Space Administration, 1997.

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4

Infrared radiative forcing and atmospheric lifetimes of trace species based on observations from UARS. National Aeronautics and Space Administration, 1997.

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5

Tibaldi, Stefano, and Franco Molteni. Atmospheric Blocking in Observation and Models. Oxford University Press, 2018. http://dx.doi.org/10.1093/acrefore/9780190228620.013.611.

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The atmospheric circulation in the mid-latitudes of both hemispheres is usually dominated by westerly winds and by planetary-scale and shorter-scale synoptic waves, moving mostly from west to east. A remarkable and frequent exception to this “usual” behavior is atmospheric blocking. Blocking occurs when the usual zonal flow is hindered by the establishment of a large-amplitude, quasi-stationary, high-pressure meridional circulation structure which “blocks” the flow of the westerlies and the progression of the atmospheric waves and disturbances embedded in them. Such blocking structures can hav

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6

Çolak, Alper H., Simay Kirca, and Ian D. Rotherham, eds. Ancient Woods, Trees and Forests. Pelagic Publishing, 2022. http://dx.doi.org/10.53061/kzad4079.

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As trees age, they become ecologically richer and more full of life. The process of a tree, wood or forest becoming ‘ancient’, however defined, involves a vast and subtle web of relations – among the trees themselves, with other organisms, with the wider landscape and with human beings. A single tree can provide a vast array of habitats which are an integral part of the complex co-evolutionary relationships evolved over its lifetime and later during its sometimes long afterlife. From ancient times until today, trees and woods have inspired artists, writers and scientists; they have shaped cult

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Capítulos de livros sobre o assunto "Atmospheric lifetime"

1

Nguyen, B. C., S. Belviso, B. Bonsang, and G. Lambert. "Dimethyl Sulfide Lifetime in the Marine Atmosphere." In Physico-Chemical Behaviour of Atmospheric Pollutants. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3841-0_48.

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2

Mikkelsen, Robert L., and Terry L. Roberts. "Inputs: Potassium Sources for Agricultural Systems." In Improving Potassium Recommendations for Agricultural Crops. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59197-7_2.

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AbstractIn the potassium (K) cycle, inputs encompass all K sources that move into a given volume of soil. These inputs may include atmospheric deposition, irrigation water, runoff, erosion, as well as seeds, cuttings, and transplants. Accounting for all inputs is seldom routinely done on the farm. Many K inputs have variable concentrations, making estimations difficult. Estimates for added K are provided in some planning documents and can be used where testing of on-farm inputs is not feasible, although testing is preferred. Standard commercial fertilizers have known concentrations of K and ar

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3

Owens, John G. "Calculation of the Global Warming Potential for Sulfur Hexafluoride Using the Updated Atmospheric Lifetime from Moore, et al." In Gaseous Dielectrics IX. Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-0583-9_12.

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Perdomo Echenique, Enrique Alejandro, and Franziska Hesser. "Understanding Soil Organic Carbon Dynamics of Short Rotation Plantations After Land Use Change—From Establishment to Recultivation." In Sustainable Production, Life Cycle Engineering and Management. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-29294-1_5.

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AbstractThe increase in soil organic carbon (SOC) stocks has the potential to contribute to climate mitigation strategies by reducing atmospheric CO2. Short rotation plantations (SRP) provide bio-based resources and can possibly accumulate SOC. Estimating the potential SOC stocks of short rotation plantations can help decision-makers to implement strategies that reduce SOC loss and thus contribute to climate change mitigation. The dynamic changes in SOC were estimated for a case study using the RothC carbon turnover model. The results indicate that SOC stocks increased from 37.8 to 48.52 t C/h

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Pallab, Nazmus Sakib, Mahin Sultana, Saadman Sakib, Amrita Barua, and Tanvir Manzur. "Reducing Carbon Footprint of RC Structure in Saline Exposure: Bangladesh Perspective." In Lecture Notes in Civil Engineering. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-69626-8_62.

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AbstractThe construction industry in Bangladesh is actively pursuing the goal of preserving the equilibrium between the amount of greenhouse gases (GHGs) produced and expelled from the atmosphere. An ideal way to reduce CO2 emissions from concrete production is the utilization of industrial by-products like class F fly ash, slag, etc. as supplementary cementitious materials (SCMs). On the other hand, reducing the life cycle cost (LCC) through the extension of service life could also be an effective way to reduce the overall carbon footprint of any RC infrastructure, particularly in saline expo

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Harrison, Roy M. "Chemistry of the Troposphere." In Pollution: Causes, Effects and Control. The Royal Society of Chemistry, 2013. http://dx.doi.org/10.1039/bk9781849736480-00182.

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The concept of pollutant cycling in the atmosphere is introduced in this chapter and the basic determinants of atmospheric lifetime and concentration variability described. The hydroxyl radical is central to atmospheric chemistry and its formation pathways are discussed leading into a description of the formation chemistry and behaviour of tropospheric ozone. A subsequent description of other atmospheric oxidants (peroxyacetylnitrate and oxides of nitrogen) is followed by a consideration of the sources and sinks of atmospheric acids and bases. Amongst the most important constituents in the atm

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Whiteman, C. David. "Atmospheric Scales of Motion and Atmospheric Composition." In Mountain Meteorology. Oxford University Press, 2000. http://dx.doi.org/10.1093/oso/9780195132717.003.0010.

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Weather phenomena occur over a very broad range of scales of space and time, from the global circulation systems that extend around the earth’s circumference to the small eddies that cause cigarette smoke to swirl and mix with clear air. Each circulation can be described in terms of its approximate horizontal diameter and lifetime. Large-scale weather systems, such as hemispheric wave patterns called Rossby waves, monsoons, high and low pressure centers, and fronts, are called synopticscale weather systems. Temperature, humidity, pressure, and wind measurements collected simultaneously all ove

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Holland, Elisabeth A., G. Philip Robertson, James Greenberg, Peter M. Groffman, and Richard D. Boone James R. Gosz. "Soil CO2, N20, and CH4 Exchange." In Standard Soil Methods for Long-Term Ecological Research. Oxford University PressNew York, NY, 1999. http://dx.doi.org/10.1093/oso/9780195120837.003.0010.

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Abstract The composition of the earth’s atmosphere is largely determined by the exchange of trace gases with the oceanic and terrestrial biosphere. Human-induced perturbations to the earth’s system are changing the atmospheric composition at unprecedented rates. The gases of particular interest can be divided into two categories: those species that are radiatively active and thus influence the radiation balance of the earth (the so-called greenhouse gases: nitrous oxide [N2O], carbon dioxide [CO2], methane [CH4], chlorofluorocarbons [CFCs}, halogenated chlorofluorocarbons [HCFCs}, and ozone [0

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Taylor, F. W. "The ozone layer." In Elementary Climate Physics. Oxford University PressOxford, 2005. http://dx.doi.org/10.1093/oso/9780198567332.003.0008.

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Abstract Nevertheless, it is still one of the more important minor constituents of the atmosphere. One reason is because ozone has more strong absorption bands in the ultraviolet (UV) than the other common atmospheric gases, and so it dominates radiative transfer in this part of the spectrum. It also has important bands in the infrared. Ozone is extremely chemically active, as a result of which it plays a key role in determining the amounts of other constituents with which it reacts. It follows that ozone will be fairly short-lived; in the stratosphere, the lifetime of a typical atmospheric oz

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Calvert, Jack, Abdelwahid Mellouki, John Orlando, Michael Pilling, and Timothy Wallington. "Rate Coefficients and Mechanisms for the Atmospheric Oxidation of the Aldehydes." In Mechanisms of Atmospheric Oxidation of the Oxygenates. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199767076.003.0007.

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Aldehydes are emitted from a variety of anthropogenic sources associated with natural gas and petroleum combustion (for examples, see tables I-C-2 and I-C-3). Winer et al. (1992) have discussed direct emissions of aldehydes from biogenic sources. They are also important intermediates in the oxidation of directly emitted organic compounds. For example, formaldehyde, CH2O formed in the reaction of CH3O with O2 . . . CH3O + O2 → CH2O + HO2 . . . CH3O is formed in the oxidation of methane, and a number of other compounds. There are also many other sources of CH2O; for example, the Leeds University

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Trabalhos de conferências sobre o assunto "Atmospheric lifetime"

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Li, Wensen, A. Raman, R. Diwan, and P. K. Bhattacharya. "Corrosion of Aluminum and Copper Thin Films under Simulated Atmospheric Conditions in Laboratory Tests." In CORROSION 1998. NACE International, 1998. https://doi.org/10.5006/c1998-98341.

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Abstract Corrosion characteristics of Al and Cu thin films have been studied in cyclic fog tests using tap water fog and fog created with 0.1% NaCl solution in tap water. Likewise, their corrosion features have been analyzed in continuous immersion testing in the laboratory in distilled water, tap water, in 0.1% NaCl and 3.5% NaCl solutions in distilled water. The corrosion potentials and the corrosion currents of these thin films change and reach steady state values after some time. However, steady state is not realized in 3.5% NaCl solutions. The corrosion current density data have been used

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2

Avance, Victoria, Brandi Clark, Liam Agnew, and Fritz Friedersdorf. "Predictive Coating Condition Model for Coating Lifetime under Environmental Stressors." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17685.

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Abstract In this work, laboratory test methodologies that employ the combined environmental stressors of time of wetness and salt loading were used to excite corrosion failure modes of coating systems. Real-time measurements via interdigitated electrodes were correlated with reference panel images to monitor the evolution of coating damage. These data can give insights into the coating degradation process and can be used as parameters for developing a predictive coating condition model. A description of the sensors, electrochemical measurements, and methods for coating testing are reported alo

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Barmatov, Evgeny, John Staniland, Jack Stoney, et al. "Wireline Cable: Corrosion of Galvanized Armor Wires under Wellbore and Atmospheric Conditions." In CONFERENCE 2025. AMPP, 2025. https://doi.org/10.5006/c2025-00266.

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Abstract This paper presents the development of a novel laboratory-based methodology for assessing the corrosion behavior of galvanized steel armor wires under simulated oilfield operating conditions. This methodology will be recommended for predicting the lifetime of wireline cables. The methodology is based on studying the degradation of galvanized armor wires (a) during logging operations in a wellbore environment involving aqueous drilling fluids and elevated temperatures and (b) under accelerated atmospheric conditions simulating cable storage in hot and humid environments. The methodolog

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Franczak, Agnieszka, Christophe Baeté, Leslie Bortels, and Bart Van den Bossche. "Atmospheric Corrosion through the Eyes of a Computer Simulation." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16394.

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Abstract The economic impact of corrosion on metallic structures is a matter of great relevance throughout the world. More than half of the considerable damage due to corrosion is a result of atmospheric impacts on materials, which is logical considering that the majority of the metallic equipment and structures operate in an atmospheric environment. A need for better understanding of corrosion processes leads to an increased demand for numerical corrosion models, which become increasingly relevant towards simulation, lifetime predictions and optimization of the corrosion prevention. In the pa

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Rogers, D. J., D. Dong, and T. Mumby. "A Laboratory Study of the Lifetime of Titanium Anodes for Cathodic Protection of Steel Reinforcing Bar in Atmospherically-Exposed Concrete." In CORROSION 1997. NACE International, 1997. https://doi.org/10.5006/c1997-97249.

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Abstract Uncatalyzed titanium is shown to be usable under some cathodic protection (CP) applications. At high current densities, such as those employed in NACE Standard Test Method TMO294-94, passivation of uncatalyzed titanium occurs as expected. However, the non-linear nature of the current density versus time relationship can lead to significant lifetimes when the uncatalyzed titanium anode is operated at current densities approaching typical CP applications. Predicted lifetimes at current densities typically used in impressed current CP applications are sensitive to the history of the tita

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Hill, Mary Ann, and R. Scott Lillard. "Atmospheric Corrosion of 304 and 316 Stainless Steel 3013 Containers Used for Storage of Plutonium-Bearing Materials." In CORROSION 2003. NACE International, 2003. https://doi.org/10.5006/c2003-03678.

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Abstract The degradation of type 3013 storage containers fabricated from stainless steel is a potential problem for fifty-year storage of stabilized plutonium-bearing materials. Container materials and their welds will be exposed to stress, ionizing radiation, elevated temperatures, embrittling agents (e.g., gallium and plutonium), chloride-containing compounds, and moisture. All of these environmental conditions have been shown to be deleterious to material integrity under certain conditions. In light of these environmental conditions, the three most probable failure modes for the 3013 contai

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Ward, Darren, Mike O'Donoghue, and Vijay Datta. "40-Year Maintenance Free Coating Solution for Offshore Structures." In CONFERENCE 2024. AMPP, 2024. https://doi.org/10.5006/c2024-20591.

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Abstract Offshore assets such as those found on wind farms are being designed to have extended lifetimes of more than 40 years to offer a sustainable form of energy generation. With offshore maintenance considered a hazardous and expensive process, owners are looking for low or maintenance free solutions to protect their assets. The challenge to the coating manufacturer is twofold, firstly to design a coating system that offers a maintenance free solution in a highly corrosive environment and secondly demonstrating long term performance. This paper will describe a 40-year case history of a coa

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Goff, Adam, Charles Sprinkle, and Fritz Friedersdorf. "Galvanic Protection Coatings for 5Xxx Series Aluminum Alloys." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-08885.

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Abstract Sensitization of 5xxx series aluminum alloys is a significant concern for the U.S. Navy as the alloys have found use in a variety of ship structures for improved strength-to-weight ratios and enhanced corrosion resistance. Sensitization occurs when precipitates of β-phase magnesium aluminide form at grain boundaries when 5xxx alloys are exposed to elevated temperatures for prolonged periods. These β-phase precipitates are anodic relative to the aluminum matrix and corrode rapidly in the presence of an aggressive electrolyte. This corrosion can result in large crack formation under app

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Brossia, C. Sean, and Darrell S. Dunn. "Condition Based Coating Degradation Sensor." In CORROSION 2002. NACE International, 2002. https://doi.org/10.5006/c2002-02161.

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Abstract Atmospheric corrosion of steels, aluminum alloys, and Al-clad aluminum alloys is a problem for commercial and military vehicles and aircraft. Paints and other coatings are usually the primary means to prevent the corrosion of automobiles, trucks, and aircraft. Under ideal conditions, the coating provides a continuous layer that is impervious to moisture. At present, maintenance cycles for commercial and military aircraft and ground vehicles is based on experience and appearance rather than a quantitative determination of coating integrity. To improve the maintenance process and reduce

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Nagel Soepenberg, E. "Htstory of Materials Technology for the Automotive Industry - a Continuing Environment-Materials-Energy Debate -." In CORROSION 1993. NACE International, 1993. https://doi.org/10.5006/c1993-93546.

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Abstract From the beginning of the development of a defined Automotive Materials Technology it has been characterised by environment-materials-energy features. After the environmental issue in the sixties (increased atmospheric and road reactivity), the energy issue in the seventies (the debate on the limited resources of energy-holding raw materials), the lifetime issue in the eighties (demonstrated by a strong increase in quantity and type of precoated products), the environmental issue (now favouring the light-weight concept and product recyclability) is rising again. To realise automotive

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Relatórios de organizações sobre o assunto "Atmospheric lifetime"

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Hart, Carl, and Gregory Lyons. A tutorial on the rapid distortion theory model for unidirectional, plane shearing of homogeneous turbulence. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/44766.

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The theory of near-surface atmospheric wind noise is largely predicated on assuming turbulence is homogeneous and isotropic. For high turbulent wavenumbers, this is a fairly reasonable approximation, though it can introduce non-negligible errors in shear flows. Recent near-surface measurements of atmospheric turbulence suggest that anisotropic turbulence can be adequately modeled by rapid-distortion theory (RDT), which can serve as a natural extension of wind noise theory. Here, a solution for the RDT equations of unidirectional plane shearing of homogeneous turbulence is reproduced. It is ass

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Simmons. L51814 Survey Of Dry Low NOx Combustor Experience. Pipeline Research Council International, Inc. (PRCI), 1999. http://dx.doi.org/10.55274/r0010207.

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Air pollution has become a major public issue and it is now evident that unburned hydrocarbons, CO, and NOx must meet increasingly restrictive standards. The emissions of nitrogen oxides by gas turbines are of concern because of their high toxicity and their role in the formation of photochemical smog. The formation of NOx occurs in a gas-fired gas turbine when combustion temperatures exceed a critical level for sufficient time to allow atmospheric nitrogen and oxygen to combine. For those gas turbine applications where steam or ultra-pure water are readily available, then steam or water injec

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Gasim, Anwar, Lester Hunt, and Jeyhun Mikayilov. Methane Emissions Baseline Forecasts for Saudi Arabia Using the Structural Time Series Model and Autometrics. King Abdullah Petroleum Studies and Research Center, 2023. http://dx.doi.org/10.30573/ks--2023-dp08.

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Reducing methane (CH4) emissions is key to near-term efforts to limit global warming. CH4 is the second most abundant anthropogenic greenhouse gas (GHG) in the atmosphere after carbon dioxide (CO2). The production, transport, and consumption of fossil fuels, in addition to waste and agriculture, account for most anthropogenic CH4 emissions globally (IPCC 2018). Although CH4has only a 12-year lifetime in the atmosphere, it is 84 times more potent per ton than CO2 in a 20-year period and 28 times more potent in a 100-year period (IPCC 2018). The drastically stronger short-term potency of CH4 exp

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EGR Cooler Fouling Reduction: A New Method for Assessment in Early Engine Development Phase. SAE International, 2022. http://dx.doi.org/10.4271/022-01-0589.

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High pressure EGR provides NOx emission reduction even at low exhaust temperatures. To maintain a safe EGR system operation over a required lifetime, the EGR cooler fouling must not exceed an allowable level, even if the engine is operated under worst-case conditions. A reliable fouling simulation model represents a valuable tool in the engine development process, which validates operating and calibration strategies regarding fouling tendency, helping to avoid fouling issues in a late development phase close to series production. Long-chained hydrocarbons in the exhaust gas essentially impact

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