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 “"biogenic volatile organic compounds"”.
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Atmospheric Impact of Biogenic Volatile Organic Compounds: Improving Measurement and Modeling Capabilities
Biogenic volatile organic compounds (BVOCs) are naturally occurring organic compounds emitted by plants, trees, and ecosystems, exerting a profound influence on the Earth's atmosphere, air quality, climate, and ecosystem dynamics. This research project aims to advance our understanding of BVOC …
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Studies of the interaction of biogenic volatile organic compounds and NOx in forest environments
… is controlled by the chemistry between biogenic volatile organic compounds and NO<sub>x</sub> (NO + NO<sub>2</sub>), and therefore, a greater understanding of NO<sub>x</sub> + BVOC chemistry along with their sources and sinks is needed. One large uncertainty in understanding …
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Improving the understanding of the influence of emissions of biogenic volatile organic compounds on climate.
The feedback between the emissions of biogenic volatile organic compounds (BVOCs), atmospheric composition and climate is a key component of the Earth System. However, there remains uncertainty as to its magnitude and sign. An important factor is the gas phase chemistry of BVOCs since this …
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Understanding the chemical impacts of biogenic volatile organic compounds and the physical drivers of their observed seasonality
… from natural ecosystems, broadly classified as biogenic volatile organic compounds (BVOCs), contribute 90\% to the VOC budget. Individual BVOCs vary widely in their reaction rates with atmospheric oxidants, making their atmospheric impact highly dependent on VOC composition. Their emissions are …
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SPECIATION STUDIES FOR BIOGENIC VOLATILE ORGANIC COMPOUNDS AND SECONDARY ORGANIC AEROSOL GENERATED BY OZONOLYSIS OF VOLATILE ORGANIC COMPOUND MIXTURES
… atmosphere; the latter process forms secondary organic aerosol (SOA). One of the important sources for SOA is the oxidation of volatile organic compounds (VOCs) by OH radicals, NOx, and O3. Aerosol can be visualized as suspended solid or liquid particle which is in equilibrium with surrounding …
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Interactions of the Terrestrial Biosphere With Climate and Atmospheric Chemistry
Isoprenoids are the most dominant class of biogenic volatile organic compounds (BVOCs) and have been shown to significantly impact global tropospheric chemistry and composition, climate and the global carbon cycle. In the second part of this dissertation, the sensitivity of biogenic isoprene and …
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Laboratory studies on the production of alpha-pinene-derived organic nitrates and their atmospheric fate
<p>Currently, the formation yields of organic nitrates from the oxidation of biogenic volatile organic compounds, such as α-pinene, is highly uncertain, negatively impacting our knowledge on tropospheric ozone production and the fate of atmospheric NO<sub>x</sub>. To lower this uncertainty, we …
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Volatile organic compounds in the New England troposphere: Atmospheric chemistry and measurement techniques
… was strongly dependent on reactions of NO3 with biogenic volatile organic compounds and the fate of dinitrogen pentoxide (N 2O5). For three case studies, temporal profiles of NO 3 were calculated from measured parameters. Comparisons between measured and calculated NO3 mixing ratios highlighted …
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Investigating the Molecular Composition of Rainwater and Secondary Organic Aerosol using Ultra-High Resolution Mass Spectrometry
… provide complete molecular characterisation of organic aerosol. However atmospheric aerosol often has complex, mixed organic and inorganic composition and soft ionisation techniques that have been developed to ionise organic aerosol specifically, are susceptible to salt suppression effects and …
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Understanding the formation of secondary organic aerosol and the fates of organic nitrates formed from monoterpene oxidation
Secondary organic aerosol (SOA) contributes to a substantial fraction of fine particular matter (PM2.5) that imposes adverse health effects, large uncertainty in radiative forcing, and poor visibility. Monoterpenes represent about 15% of the annual emissions of biogenic volatile organic compounds …