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 10 of 10 for “"ozone loss"”.
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The effects of volcanic aerosols on mid-latitude ozone recovery
… the impacts of volcanic aerosols on mid-latitude ozone loss are investigated. These results are compared to the ozone column expected recovery from a run of SD-WACCM with no volcanic eruptions in the same period. Particular emphasis is placed on the last decade to investigate how the small …
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Investigation of Inorganic Stratospheric Bromine using Balloon-Borne DOAS Measurements and Model Simulations
… most important halogen effecting stratospheric ozone [WMO2003]. Although the concentration of bromine in the stratosphere is about two orders of magnitude lower than the concentration of chlorine, it currently contributes about 25% to global ozone loss due to its much greater ozone depletion …
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Studies of the Stratospheric Nitrogen and Iodine Chemistry by Balloon-Borne DOAS Measurements and Model Calculations
It is well known, that the stratospheric ozone depletion is controlled mainly by halogen and nitrogen compounds. As a result of the complex interaction between chemical and dynamical processes, a quantitative understanding of the ozone loss has not been achieved till now, although it was subject of …
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Case Studies of Stratospheric Nitrogen, Chlorine and Iodine Photochemistry Based on Balloon Borne UV/visible and IR Absorption Spectroscopy
… compounds play an important role in catalytic loss of stratospheric ozone. Balloon borne spectroscopic measurements of the vertical distribution of the most important nitrogen, chlorine and iodine containing species are used to estimate the quality of state-of-the-art instruments and retrieval …
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Attribution of stratospheric ozone change and associated climate impacts
Recognition of stratospheric ozone depletion as a significant global danger sparked the landmark international agreement of the Montreal Protocol to control the production of ozone depleting substances (ODSs). There are now signs of stratospheric ozone recovery, and it is essential to understand …
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Studies of Stratospheric and Tropospheric Ozone, NO2, and BrO Using UV-Visible Spectroscopy in the Arctic and at Mid-latitudes
… measurements at PEARL, was used to validate ozone and NO2 measurements from the Atmospheric Chemistry Experiment (ACE) and Optical Spectrograph and InfraRed Imaging System (OSIRIS) satellite instruments. Ozone from all instruments agrees to within 12.0%, while NO2 measurements agree to within …
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On potential effects from the aviation and refrigeration sectors on ozone and climate
… refrigeration sectors contribute to the global ozone budget and to climate change via emissions of relevant gases and particles, subsequently followed by a complex set of chemical and physical processes. For the refrigeration sector, iodotrifluoromethane (CF3I) and methyl iodide (CH3I) are two …
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Bestimmung von Ozonabbauraten über der Arktis und Antarktis mittels Ozonsonden- und Satellitendaten
Diese Arbeit beschäftigt sich mit der chemischen Ozonzerstörung im arktischen und antarktischen stratosphärischen Polarwirbel. Diese wird durch Abbauprodukte von anthropogen emittierten Fluorchlorkohlenwasserstoffen und Halonen, Chlor- und Bromradikale, verursacht. Studien in denen der gemessene …
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Ozone Chemistry in the Lower Stratosphere: Drivers, Trends, and Impacts
… volcanic eruptions on anthropogenically driven ozone depletion and recovery trends is explored. Results confirm previous work showing that large volcanic eruptions increased the rate of ozone depletion prior to the mid-1990s, and for the first time quantify how the combination of an unusually …