Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"Ozone-layer"”.
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Sensitivity of the ozone layer, climate, and public health to changes in the location of aviation emissions
Aviation’s impact on the ozone layer, climate, and air quality varies based on the location of emissions. Changes from subsonic aircraft emissions due to regional growth, and the potential re-introduction of supersonic transport flying in the stratosphere present new scenarios that regulations do …
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Life cycle assessment of conventional and alternative fuels for vehicles
… acidification, eutrophication, global warming, ozone layer depletion and human toxicity potential using three different impact assessment methods. The analyses show that hydrogen vehicle is found to have the lowest environmental impacts with ozone layer depletion of 8.14×10-10 kg CFC-11-eq/km …
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Impact of two potential policy options on atmospheric chemistry and climate: hydrogen economy and low-GWP alternatives to ozone depleting substances
… of the environment, e.g., attenuation of the ozone layer due to emissions of ozone-depleting substances, climate change due to greenhouse gas emissions, and air pollution due to fossil fuel combustion. This research analyzes the impacts of two potential future policy options, (1) hydrogen …
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Quantifying Stratospheric Chlorine Chemistry by the Satellite Spectrometers GOME and SCIAMACHY
… century, an almost complete destruction of the ozone layer above the Antarctic in springtime (and to a lesser extent also above the Arctic) is observed, which is caused by the release of atomic chlorine and bromine from anthropogenic halogen compounds. Due to the fast phase out of the production …
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Identification of Near-Uv Chromophores and Characterization of Cellular Responses to Near-Uv Damage and Oxygen Stress
… to the potential decrease in protection from the ozone layer.
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Assessment of sludge management options in a waste water treatment plant
… potential, eutrophication, acidification, ozone layer depletion potential were calibrated using GaBi.
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Effects of ultraviolet-B radiation on plant growth, symbiotic function and concentration of metabolites in legumes and an assessment of F1 generation for carryover effects
Reduction in ozone layer thickness in the stratosphere and the resultant increase in ground level of biologically active ultraviolet-B (UV-B) radiation prompted research into the effect of UV-B on growth and metabolism of terrestrial plants. In this study, eight legume species including three …
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Motor vehicle air-conditioning : utilising the exhaust gas energy to power an absorption refrigeration cycle
… an adverse environmental influence (i.e. ozone layer etc.).
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Coverage of skin cancer prevention in professional journals and the popular press
… to compare coverage of skin cancer prevention, ozone layer depletion, and suntanning norms. Articles were also reviewed for coverage of individual sun protection measures and coverage of collective skin cancer risk reduction through policy and legislative reform. A total of 155 articles indexed …
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Tropospheric composition of organohalogens and alkyl nitrates: tropical and temperate case studies
… and chloroform were observed in the boundary layer over oil palm plantations. OP3 aircraft data suggests that the oil palm plantations facilitate the formation of C2 to C4 alkyl nitrates. There was evidence that the southeast coast of Sabah is a source region for the bromocarbons measured. The …
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Tropospheric composition of organohalogens and alkyl nitrates: tropical and temperate case studies
… and chloroform were observed in the boundary layer over oil palm plantations. OP3 aircraft data suggests that the oil palm plantations facilitate the formation of C2 to C4 alkyl nitrates. There was evidence that the southeast coast of Sabah is a source region for the bromocarbons measured. The …
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Investigation of Experimental Variation of Bovine Sphingomyelin as a Novel Ingredient for Ultraviolet Protection
… is expected to grow tenfold as depletion of the ozone layer contributes to harsher rays reaching Earth’s surface [2]. A common way to protect against those ultraviolet waves is to apply sunscreen, however, recent reports call into question the safety of some active ingredients as they can enter …
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Product descriptors for early product development : an interface between environmental experts and designers
… in predicting solid material, greenhouse effect, ozone layer depletion, acidification, eutrophication, winter smog, and summer smog.
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The Montreal Protocol’s multilateral fund: an environmental and economic success
Although the ozone layer is vital to life on Earth, as a common resource it has been the subject of rational exploitation. With ozone depletion a global (rather than merely regional) problem, measures to address it have necessarily been international efforts. The international treaty that addressed …
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UVB radiation; a specific regulator of the growth and development of Arabidopsis thaliana
… about the degradation of the stratospheric ozone layer. Early research focused solely on UVB as an agent of plant stress but recently the thinking surrounding UVB has undergone a paradigm shift, now it is seen as a key regulator of plant growth and development. The “UVB response” encompasses …
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Spectroscopic measurements of atmospheric trace gases at Neumayer-Station, Antarctica
… The measurements of the atmospheric trace gases ozone, NO2, OClO, BrO, IO and O4 were performed using a new UV/Vis spectrograph, developed within the scope of this work. The main intention of DOAS measurements in the Antarctic coastal region was to investigate the chemical composition of the …
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Evolution, function and manipulation of methyl halide production in plants
… organic compounds which contribute to natural ozone degradation in the atmosphere. Plants are important emitters of these compounds due to the activity of halide/thiol methyltransferases (HTMTs), however, the function of HTMTs or methyl halide production is not known. In Arabidopsis thaliana, …
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Trend Analyses of the Abundances of Atmospheric Molecules
… Laboratory (PNNL) database.</p> <p>Near global ozone isotopologue distributions have been determined from infrared solar occultation measurements of the Atmospheric Chemistry Experiment (ACE) satellite mission. ACE measurements are made with a high resolution Fourier transform spectrometer …
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A systems approach to assessing the sustainability of hybrid community energy systems.
… system and many others, climate change and ozone layer depletion indicators have the strongest effect on ISI. Affordability, commercial viability, and land area indicators are also critical for other energy systems. The ISI is expected to prove useful as a high-level, multi-criteria decision …
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Quantifying future volcanic impacts on climate projections and their uncertainties using stochastic volcanic emissions
… potentially delay the recovery of the Antarctic ozone layer (Chapter 4); and (iii) contribute to a significant fraction of the total uncertainty in temperature projections (Chapter 5). Overall, this thesis highlights the importance of accounting for the sporadic nature of volcanic eruptions and …
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