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Dissertations / Theses on the topic 'Volcanic effects'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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1

Miles, Georgina. "Detection and effects of volcanic sulphur in the stratosphere." Thesis, University of Oxford, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558461.

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Explosive volcanic eruptions perturb the atmosphere, and their main impact arises from the large quantities of 802 emitted. Within this thesis this effect is characterised from a modelling perspective and the detection and measure- ment of 802 by a satellite are improved. A stratospheric aerosol box model is developed that parameterises the aerosol evolution from an emitted mass of volcanic 802. Using aerosol optical depth measurements and a simple energy balance model, the 802 mass is directly related to a global average tempera- ture change. Combining this model with historical eruption reco

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2

Haskins, Jessica D. "The effects of volcanic aerosols on mid-latitude ozone recovery." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90662.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 30-31).<br>In this paper, comparisons between the derived Chemistry Climate Model Initiative aerosol data set to balloon sonde measurements of aerosols made in Laramie, Wyoming are made between 1979- 2012. Using the derived CCMI aerosol data set as the input for surface area density of aerosols in the Specified Dynamics-Whole Atmosphere Climate Community Model (SD-WACCM), the impacts of volcan

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3

Marshall, Lauren Rebecca. "Effects of volcanic eruption source parameters on radiative forcing and sulfate deposition." Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/22551/.

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Explosive volcanic eruptions can inject sulfur dioxide (SO2) into the stratosphere, which forms stratospheric sulfate aerosol that can significantly impact the climate. The radiative forcing of an eruption depends on several eruption source parameters: the mass of SO2 emitted, the latitude and the emission height. However, the combined effects of these parameters are not well understood. Reconstructions of historic volcanic radiative forcing, which are essential for understanding the role of volcanism on climate variability, are derived from ice core sulfate records, but rely on relationships

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4

Walter, Gary R. "The effects of molecular diffusion on groundwater solute transport through fractured tuff." Diss., The University of Arizona, 1985. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1985_458_sip1_w.pdf&type=application/pdf.

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5

Zhuo, Zhihong [Verfasser]. "The hydrological effects of explosive volcanic eruptions in the Asian monsoon region / Zhihong Zhuo." Berlin : Freie Universität Berlin, 2019. http://d-nb.info/1202041981/34.

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6

Faizy, Shelly Mardhia. "Assessing a Modeling Standard in Volcanic-Geothermal Systems: the Effects of the Lower System Boundary." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-438664.

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Geothermal energy consumption is projected to increase along with other renewable energy in the future. Therefore, it is important to have a better understanding on the evolution of geothermal systems to optimize the exploitation of such resources. Generally, numerical models are used as a fundamental tool to study a potential geothermal field. However, current modeling practices tend to focus on the shallow area around the heat source, while ignoring the deeper part below the heat source. The purpose of this project is to observe the influence of lower boundary at the bottom of intrusion towa

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7

Romine, William Whittington Alan G. "Flow and heat transfer properties of Mono Craters rhyolites effects of temperature, water content, and crystallinity /." Diss., Columbia, Mo. : University of Missouri--Columbia, 2008. http://hdl.handle.net/10355/5685.

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The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on October 5, 2009). Thesis advisor: Dr. Alan G. Whittington. Includes bibliographical references.

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8

Marske, Katharine Ann. "Effects of volcanic ash on the insect food of the Montserrat Oriole Ictereus oberi Lawrence 1880." Thesis, Montana State University, 2004. http://etd.lib.montana.edu/etd/2004/marske/MarskeK0804.pdf.

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The Montserrat Oriole, Icterus oberi Lawrence, endemic to the West Indian island of Montserrat, has grown critically endangered since volcanic eruption began on that island in 1995. The Soufriere Hills Volcano has devastated much of the oriole's native habitat, and populations within intact forests have plummeted in recent years. One hypothesized cause for the Montserrat Oriole's decline is that low insect prey numbers during the nesting season, as a result of volcanic ash in the environment, is resulting in increased nest failure. The hypothesis of a negative effect of ash on canopy arthropod

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9

Lyu, Han. "EFFECTS OF CLIMATE AND GEOCHEMISTRY ON SECONDARY MINERAL DISTRIBUTION AND SOIL ORGANIC CARBON POOLS IN TROPICAL VOLCANIC REGIONS." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263813.

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10

MINAGAWA, Tetsuo, Takafumi TAKAHASHI, Kazuya TANAKA, and Iwao KAWABE. "Evidence for lanthanide tetrad effect in mafic volcanic rocks: Concave tetrad effects in REE patterns for MORB and alkali olivine basalt in western Kyushu, Japan." Dept. of Earth and Planetary Sciences, Nagoya University, 2008. http://hdl.handle.net/2237/14728.

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11

Cross-Najafi, Isabella. "Effects of Volcanic Ash Deposition and the Manson Impact on Marine Paleoredox and Paleoproductivity| Geochemical Evidence from the Cretaceous Pierre Shale." Thesis, West Virginia University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10256866.

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<p> Cretaceous Period. There is limited research on organic carbon content of the Pierre Shale in South Dakota. Frequent volcanic eruptions combined with climate change resulted in an increase in carbon dioxide in the atmosphere, leading to decreases in marine oxygen content. Decreasing marine oxygen has been attributed to higher amounts of preserved organic matter in marine sediment. Impact of volcanic ash deposition in the Cretaceous Interior Seaway has not been thoroughly studied. The Pierre Shale also contains the Crow Creek Member, a 5 foot thick layer of unconsolidated sand and rip-up cl

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12

Iles, Carley Elizabeth. "Effect of volcanic eruptions on the hydrological cycle." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/9918.

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Large explosive volcanic eruptions inject SO2 into the stratosphere where it is oxidised to sulphate aerosols which reflect sunlight. This causes a reduction in global temperature and precipitation lasting a few years. Here the robust features of this precipitation response are investigated, using superposed epoch analysis that combines results from multiple eruptions. The precipitation response is first analysed using the climate model HadCM3 compared to two gauge based land precipitation datasets. The analysis is then extended to a large suite of state-of-the art climate models participating

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13

Hill-Butler, C. "Evaluating the effect of large magnitude earthquakes on thermal volcanic activity : a comparative assessment of the parameters and mechanisms that trigger volcanic unrest and eruptions." Thesis, Coventry University, 2015. http://curve.coventry.ac.uk/open/items/5f612a7d-ebbf-4d38-90aa-89c4984a1c0f/1.

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Volcanic eruptions and unrest have the potential to have large impacts on society causing social, economic and environmental losses. One of the primary goals of volcanological studies is to understand a volcano’s behaviour so that future instances of unrest or impending eruptions can be predicted. Despite this, our ability to predict the onset, location and size of future periods of unrest remains inadequate and one of the main problems in forecasting is associated with the inherent complexity of volcanoes. In practice, most reliable forecasts have employed a probabilistic approach where knowl

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14

Walia, Rakesh Kumar. "Effect of horizon roughness on lateral continuity and amplitude variation of deeper reflections." Thesis, University of Southampton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242226.

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15

Davies, Ceri John. "Assessing the effect of mineral alteration on palaeointensities derived from volcanic rocks of cretaceous age." Thesis, University of Liverpool, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511065.

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16

Davidson, Jonathan Robert Joseph. "The Effect of Fractures on Fluid Flow in Geothermal Systems, Taupo Volcanic Zone, New Zealand." Thesis, University of Canterbury. Department of Geological Sciences, 2014. http://hdl.handle.net/10092/9566.

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The goal of this thesis is to evaluate the effect of fractures on the bulk permeability of rocks. Several methods are used to address this problem: 1) surface radon gas measurements, 2) stress induced fracture permeability 3) fracture generation conditions. Each method was variably effective in providing answer to the initial question. The radioactive radon isotopes (220Rn and 222Rn) were measured in soil gas extracted from 1 m depth in two areas and the concentrations for both isotopes tended to be higher near mapped faults. Soil samples recovered from 1 m depth indicate that the isotopic an

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Aranzulla, Massimo. "Atmospheric water vapour tomography for DInSAR application and effect of volcanic plume on the microwaves." Doctoral thesis, Università di Catania, 2014. http://hdl.handle.net/10761/1543.

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A particular synergy among GPS and SAR techniques, to improve the precision of the current ground deformation monitoring techniques,is investigated. The study of atmospheric anomalies in the GPS EM waves propagation is useful to extrapolate information about the wet refractivity ?eld. Because of its height and the quite variable weather conditions, the estimation of Mount Etna atmospheric anomalies using GPS measurements have noticeable importance to calibrate the SAR interferograms and to establish the effective ground deformation of the volcanic edifice. In this study we presented a method

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18

Bergström, Marcus. "Explaining Volcanism on Iceland – a review of the Mechanism and Effects of Historic Eruptions." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229130.

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Iceland is the land-based expression of the Mid-Atlantic Ridge and is one of the most volcanically active regions of the world. Volcanic eruptions on Iceland are a source of geological hazard to humans and the environment due to the release of ash, gases and lava. The composition of the material released is determined by the chemical composition of the surrounding bedrock and the magma upwelling from the Earth’s crust. The effects of historical eruptions on Iceland have been locally devastating and of global impact. The eruption of Lakagígar in 1783-1784 is known to have been the largest erupt

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19

Grove, Clayton. "Direct and indirect effects of flood basalt volcanism on reservoir quality sandstone." Thesis, Durham University, 2014. http://etheses.dur.ac.uk/10665/.

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This thesis describes the direct diagenetic effects on porous clean sand substrate due to the emplacement of basalt lava flows. The thesis also describes the effects of the emplacement of basaltic dykes and sills into clean porous sandstone. The primary dataset comes from the Cretaceous Etendeka Group, NW Namibia, where the Etendeka Flood Basalts (and associated subsurface plumbing system) interacted with the aeolian Twyfelfontein Formation sandstone. Secondary datasets from the recent Rekjanes Peninsular basalts, Iceland; the Miocene Columbia River Flood Basalt province and the Miocene Snake

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Shinozaki, Maya. "The effect of sintering and CMAS on the stability of plasma-sprayed zirconia thermal barrier coatings." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/244944.

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State of the art thermal barrier coatings (TBCs) for gas turbine applications comprise (7 wt.%) yttria partially stabilized zirconia (7YSZ). 7YSZ offers a range of attractive functional properties – low thermal conductivity, high thermal expansion coefficient and high in-plane strain tolerance. However, as turbine entry temperatures are raised, the performance of 7YSZ coatings will be increasingly affected by sintering and environmental contamination, by calcia-magnesia-alumina-silica (CMAS) deposits. The effect of sintering-induced stiffening on the driving force for spallation of plasma-spra

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21

Thomas, Mark Edward. "Geomechanics of volcano instability and the effects of internally elevated pore fluid (gas) pressures." Thesis, Kingston University, 2007. http://eprints.kingston.ac.uk/20389/.

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Volcano flank collapse events affect volcanic edifices where a range of different processes are at work. However, there is at least one mechanism of generating instability that may be present at all volcano collapse locations: increases of edifice pore fluid pressures from internal sources. The use of geomechanical classification schemes such as the Rock Mass Rating (RMR) show that a volcano can be considered mechanically weak and little more than a pile of granular material. Initial field work and laboratory testing demonstrated that it is possible to estimate volcanic rock-mass compressive (

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22

Durand, Jonathan. "Modélisation de la dynamique et de l'évolution physico-chimique des gaz volcaniques lors de l'éruption d'avril 2007 du Piton de la Fournaise." Thesis, La Réunion, 2016. http://www.theses.fr/2016LARE0004/document.

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Le dioxyde de soufre (SO2) est un des principaux gaz émis lors des éruptions volcaniques. Au Piton de la Fournaise (La Réunion) environ 230 kT de SO2 ont été libérés pour la seule éruption d'avril 2007. Ces émissions ont provoqué d'importants problèmes sanitaires associés à des dégradations des infrastructures et des écosystèmes. Les mesures de SO2 réalisées par l'ORA ont relevé des concentrations supérieures aux seuils critiques pour la santé mais pas aux périodes où l'éruption était la plus intense. SO2 étude consiste à utiliser le modèle meso-échelle atmosphérique Meso-NH pour simuler le tr

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23

Zlotnicki, Jacques. "Sur les effets volcanomagnetiques et tectonomagnetiques." Paris 7, 1987. http://www.theses.fr/1987PA077296.

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Etude du champ magnetique terrestre sur les edifices volcaniques ou dans les regions soumises a une activite sismotectonique. Trois themes de recherche sont developpes: l'acquisition des mesures de terrain, les mesures experimentales realisees en laboratoire, et les simulations numeriques. L'etude de terrain porte sur des resultats obtenus sur les volcans de la soufriere de guadeloupe, la montagne pelee de martinique et le piton de la fournaise a la reunion

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Kushnir, Alexandra Roma Larisa. "Permeability development and evolution in volcanic systems : insights from nature and laboratory experiments." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2006/document.

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La transition entre le comportement effusif et explosif des volcans de magma riche en silice est en partie contrôlée par la capacité des surpressions gazeuses à se dissiper hors du magma. La libération efficace des gaz est associée aux éruptions effusives tandis que la rétention de ces gaz contribue aux processus explosifs. L’une des approches pour évaluer la facilité d’échappement des gaz est de considérer l’évolution et le développement de la perméabilité dans la colonne magmatique et dans l'édifice. J'évalue dans ce travail de thèse le rôle des changements post-mise en place sur la microstr

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Williams, Trevor David. "Surviving Catastrophe: Resource Allocation and Plant Interactions Among the Mosses of Mount St. Helens Volcano." PDXScholar, 2016. https://pdxscholar.library.pdx.edu/open_access_etds/3373.

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Mosses are some of the first colonizers to disturbed sites, yet their roles in early plant community structuring are not well understood. The primary succession zones of volcanoes provide opportunities to conduct natural experiments into how mosses contribute to early plant community formation, as well as how the unique environments found in such zones affect plant traits, particularly those associated with stress tolerance. Though plant community changes have been well-documented since Mount St. Helens (MSH) volcano erupted in 1980, the volcano's moss assemblages, their influence on other pla

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Merlhiot, Gaëtan. "Perception des risques, incertitude et prise de décision en situation de catastrophe naturelle liée au volcanisme." Thesis, Clermont-Ferrand 2, 2016. http://www.theses.fr/2016CLF20019.

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L’objectif général de cette thèse est d’étudier la prise de décision des individus en situation de catastrophe naturelle, en l’occurrence d’origine volcanique, et d’aboutir à des applications possibles, notamment à une amélioration de la prise de décision des populations exposées. Nous nous sommes intéressés à l’incertitude, dimension essentielle des situations de catastrophe naturelle, qui présente un impact important sur les émotions et la prise de décision des individus. D’une part, l’incertitude situationnelle est déterminante quant aux émotions prospectives comme la peur, et, d’autre part

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Aloupogiannis, Panagiotis. "Etude theorique et experimentale des effets de matrice en analyse par emission de rayons x induite par particules chargees (pixe) : etablissement d'une nouvelle methode de correction dite des "parametres alpha"." Paris 7, 1988. http://www.theses.fr/1988PA077002.

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Mora, Fernandez Mauricio Manuel. "Étude de la structure superficielle et de l'activité sismique du volcan Arenal, Costa Rica." Chambéry, 2003. http://www.theses.fr/2003CHAMS004.

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Le volcan Arenal présente une activité explosive continue de type strombolien caractérisée par l'effusion permanente de coulées de lave, la formation d'écoulements pyroclastiques et une sismicité intense. Cette activité est suivie depuis 1974 par l'Observatorio Sismologico y Vulcanologico de Arenal y Miravalles (OSIVAM) rattaché à l'Institut Costarisien d'Electricité (ICE). Dans la première partie de ce travail, nous avons étudié l'activité volcanique de l'Arenal entre 1986 et 2000 à partir des données obtenues par l'OSIVAM que nous avons regroupées en une base de données unique. Nous avons an

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Clarke, Dawn Elizabeth. "Silencing the voices of women : a case study on the effects of the "Supporting People" programme on survivors of domestic abuse in a support and housing association." Thesis, University of Bradford, 2008. http://hdl.handle.net/10454/4342.

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For centuries women have experienced domestic violence from men they know, as a consequence of which many turn to public services for support. Traditionally, these services have failed to provide adequate support, yet it is through these interactions with the services that abused women's lives are shaped and defined. Service providers therefore need to hear their voices in order to develop effective support services that enable survivors to 'move on' with their lives. A government initiative ¬- the Supporting People Programme (SPP) - has the potential to ensure that housing support providers d

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Clarke, Dawn E. "Silencing the voices of women. A case study on the effects of the "Supporting People" programme on survivors of domestic abuse in a support and housing association." Thesis, University of Bradford, 2008. http://hdl.handle.net/10454/4342.

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For centuries women have experienced domestic violence from men they know, as a consequence of which many turn to public services for support. Traditionally, these services have failed to provide adequate support, yet it is through these interactions with the services that abused women's lives are shaped and defined. Service providers therefore need to hear their voices in order to develop effective support services that enable survivors to 'move on' with their lives. A government initiative ¬- the Supporting People Programme (SPP) - has the potential to ensure that housing support provid

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31

Foucart, Brice. "Observation et modélisation de la Formation de Nouvelles Particules (FNP) au sein du panache volcanique du Piton de la Fournaise." Thesis, La Réunion, 2019. http://www.theses.fr/2019LARE0014/document.

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L'activité volcanique peut représenter une source naturelle de pollution atmosphérique. Cette pollution peut engendrer une dégradation de la qualité de l'air, affecter la santé humaine et perturber la sécurité aérienne. Le Piton de la Fournaise à La Réunion est l'un des volcans basaltique les plus actifs au monde. Ses éruptions sporadiques génèrent des panaches volcaniques essentiellement constitués de gaz et de nanoparticules qui se propagent dans l'atmosphère. En journée, la formation d'oxydants (photolyse) permet d'oxyder une partie du dioxyde de soufre en acide sulfurique. Les molécules d'

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Michel, Sylvie. "Effets électriques et magnétiques sur le Piton de la Fournaise (île de La Réunion) : influence des circulations des fluides." Paris 7, 1995. http://www.theses.fr/1995PA077057.

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Localisé sur l'île de la Réunion, le Piton de la Fournaise est l'un des volcans basaltiques les plus actifs au monde. Aux signaux volcanomagnétiques engendrés par les éruptions, s'ajoutent des variations magnétiques plus inhabituelles. En certains points du volcan, apparaissent de lentes variations, irréversibles sur 9 ans, et des variations cycliques annuelles, distinctes de la variation magnétique annuelle ionosphérique. Dans cette thèse nous nous intéresserons uniquement aux variations magnétiques à long terme. Les lentes variations sont corrélées à l'activité globale de la Fournaise, tandi

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33

Dumont, Marc. "Caractérisation multi-échelle des structures hydrogéologiques en contexte volcanique insulaire par électromagnétisme héliporté : application à l’île de La Réunion." Thesis, La Réunion, 2018. http://www.theses.fr/2018LARE0010/document.

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L’île de La Réunion a été couverte par une vaste campagne de géophysique héliportée en 2014. Le dispositif SkyTEM a permis de cartographier l’anomalie du champ magnétique et la résistivité électrique du sous-sol jusqu’à 300 m de profondeur, et ce, sur l’ensemble de l’île. L’acquisition de ce jeu de données met en évidence la problématique de l’interprétation des données électromagnétiques héliportées à l’échelle régionale. L’interprétation d’un modèle 3D de résistivité d’une superficie 2 500 km2 nécessite la mise en place de méthodologies innovantes pour le confronter aux données géologiques,

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Martelli, Kim. "Vulnérabilité physique des milieux urbanisés face à la menace des inondations (lahars et crues éclair) : application au cas d'étude d'Arequipa au Pérou." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2011. http://tel.archives-ouvertes.fr/tel-00881754.

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Les écoulements volcaniques (lahars, écoulements hyperconcentrés) et les crues soudaines représentent des phénomènes destructeurs et dangereux. Malgré leur pouvoir destructeur (e.g. Armero, Colombie, 1985), il existe très peu d'études centrées sur les effets des lahars en zone urbaine, alors qu'ils représentent une menace réelle pour de nombreuses villes, comme Arequipa, au Pérou. Arequipa est une ville de presque 1 million d'habitants située à 17 km au sud-est du volcan El Misti. La dernière éruption majeure du Misti remonte à 550 ans (1460 après J.C.) et de plus petites éruptions ont parsemé

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Pei, Ling Kai, and 裴令凱. "Atmospheric and Ionospheric Effects Triggered by Volcanic Eruptions." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/90195655010665873181.

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碩士<br>國立中央大學<br>太空科學研究所<br>100<br>Volcanic activity plays an important role on weather/climate and atmosphere-ionosphere coupling. Volcanic eruptions can disturb atmospheric temperature and ionospheric electron density. FOMORSAT-3/COSMIC (F3/C) observations and ECMWF data are uesd to probe atmospheric temperature changes during 8 great volcanoes of Volcanic Exlosivity Index (VEI) ≥ 4. It is found that 3 out of the 8 events yield tropospheric warming and stratospheric cooling. On the contrary, 4 out of the 8 events are tropospheric cooling and stratospheric warming. 1 out of the 8 events shows

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Thordarson, Thorvaldur. "Volatile release and atmospheric effects of basaltic fissure eruptions." Thesis, 1995. http://hdl.handle.net/10125/9865.

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Carlsen, Hanne Krage. "Health effects of air pollution in Iceland : respiratory health in volcanic environments." Doctoral thesis, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-89153.

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Air pollution has adverse effects on human health. The respiratory system is the most exposed and short-term changes in air pollution levels have been associated with worsening of asthma symptoms and increased rates of heart attacks and stroke. Air pollution in cities due to traffic is the major concern, as many people are exposed. However, natural sources of air pollution such as natural dust storms and ash from volcanic eruptions can also compromise human health. Exposure to volcanic eruptions and other natural hazards can also threaten mental health. Air pollution has not been extensively s

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Chen, Yu-Shu, and 陳玉樹. "Effects of salt and drought stress on plant distribution in Wushanting Mud Volcanic areas." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/07182822463226666572.

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碩士<br>國立高雄師範大學<br>生物科學研究所<br>90<br>Abstract This research is based on two different plants were sampling from the peak of Wushanting Mud Volcanic areas. The plants mentioned in this abstract consist of Bidens pilosa, a widely sprawling plant in the area, and Pluchea indica, a regional dominant plant found in this mountain. Aside from taking the samples from Wushanting, different ratios of mud were added into the planting, and the situation of drought was simulated a month later, so as to analyze the impact of salt and drought on the distribution of these plants. The resul

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Cunha, Luis Filipe das Neves. "Effects of the extreme environment of volcanic origin in organisms : using earthworms as biological models." Doctoral thesis, 2012. http://hdl.handle.net/10400.3/3968.

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Tese de Doutoramento, Biologia (Biologia Celular e Molecular), 18 de Maio de 2012, Universidade dos Açores.<br>Understanding how living processes persist under the challenges of intense physical or chemical stress emanating from diverse geogenic sources, such as those originated by volcanic activity have increasingly gained importance mainly compelled by biotechnology imperatives. Volcanically active regions, such as Furnas, a geothermal field located in São Miguel Island (Azores), often have a high-density of human inhabitants due to the elevated natural fertility of its soils, despite of cre

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Marske, Katharine Ann. "Effects of volcanic ash on the insect food of the Montserrat Oriole Icterus oberi Lawrence 1880." 2005. http://etd.lib.montana.edu/etd/2004/marske/MarskeK0804.pdf.

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Morrow, James W. "A longitudinal study to characterize Hawaiʻi's volcanic aerosol and investigate its potential acute effects on asthmatic children". 2000. http://wwwlib.umi.com/dissertations/fullcit/9968046.

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Matz, Stephan E. "The effects of the Mazama tephra-falls : a geoarchaeological approach." Thesis, 1987. http://hdl.handle.net/1957/33997.

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About 7,000 years ago two major tephra-falls blanketed the Pacific Northwest in volcanic ash. These two tephra-falls, identified as the Llao and climatic tephra-falls, were a part of the eruptive events that led up to the collapse of Mount Mazama to form Crater Lake in the southern Oregon Cascades. The tephra-falls occurred about 200 years apart at around 7,000 years B.P. and 6,800 years B.P. for the Llao and climatic eruptions respectively. The effects of the tephra-falls on the flora, fauna, and people of the period have been characterized by different researchers as ranging from minimal to

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Aranzulla, Massimo. "Atmospheric water vapour tomography for DInSAR application and effect of volcanic plume on the microwaves." Thesis, 2013. http://hdl.handle.net/2122/9869.

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A particular synergy among GPS and SAR techniques, to improve the precision of the current ground deformation monitoring techniques, is investigated. The study of atmo- spheric anomalies in the GPS EM waves propagation is useful to extrapolate information about the wet refractivity ﬁeld. Because of its height and the quite variable weather conditions, the estimation of Mount Etna atmospheric anomalies using GPS measure- ments have noticeable importance to calibrate the SAR interferograms and to establish the “eﬀective” ground deformation of the volcanic ediﬁce. In this study we presented

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Krupitsky, Dmitry. "Effects of volcanic gas (vog) on the lung function and self-reported symptoms of Hawai'i Volcanoes National Park workers." Thesis, 2008. http://hdl.handle.net/10125/20437.

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Thesis (Ph.D.)--University of Hawaii at Manoa, 2008.<br>Conclusion. Visual vog observers can provide reliable data which are correlated with data from SO2 and PM1.0 monitors. Visually observed vog is as useful tool of predicting self-reported symptoms as SO2 and PM1.0 monitors. Network of visual observes can provide useful assessment of the park.<br>Introduction. Kilauea, the largest stationary source of sulfur dioxide (SO2) in the nation, has been erupting continuously since 1986. The visible cloud (vog) formed by emitted gases in combination with moisture and sunlight may be directed by the

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Wu, De-Lun, and 吳德倫. "The effect of exotic species habitat expansion on arthropod disease vectors in a volcanic island." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/rg778g.

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碩士<br>國立臺灣師範大學<br>生命科學系<br>107<br>Lack of predators and competitors in small and hard-to-reach volcanic oceanic islands can facilitate ecological release of introduced species, including rodents that serve as hosts or reservoirs of a variety of zoonotic diseases. The volcanic Lanyu Island has a high prevalence of scrub typhus, which is transmitted by chigger mites; in addition, spotted fever group rickettsiae have been detected in hard ticks. Rodents are the primary hosts of chiggers and hard ticks. The rodent community in Lanyu is dominated by the exotic Asian house rat (Rattus tanezumi), whi

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Bellomo, S. "Environmental impact of magmatic fluorine emission in the Mt. Etna area." Thesis, 2005. http://hdl.handle.net/2122/349.

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Fluorine is the most reactive and the most electronegative of all elements, meaning that it has a powerful attraction for electrons and that it is able to attack all other elements, with the exception of oxygen and nitrogen, so it is not found in the free elemental state in nature. Fluorine is widely distributed throughout the earth’s crust as the fluoride ion. Fluorine is reported to be the 13th most abundant element in the earth’s crust (Smith and Hodge, 1979), with an average concentration of 0.032% by weight. Fluorides are released into the environment naturally through the weathering and

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Juhariah, Jujuk, and Jujuk Juhariah. "Effect of Merapi Volcano Eruption on Land Use Change and Agriculture." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/93582253369902347974.

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碩士<br>國立東華大學<br>自然資源與環境學系<br>104<br>ABSTRACT JUJUK JUHARIAH. The Effect of Merapi Volcano Eruption on Land Use Change and Agriculture. Adviser: Prof. Zue-Er Chen There are four purposes of this research. To know the effect of Merapi Volcano eruption on land use change and agriculture. Identify the most suitable crops in for affected areas. To advise the Sleman government about more suitable land use, thus increasing the local potential. To help the farmers overcome negative effects of the eruption as soon as possible. This research conducted in Cangkringan District, Sleman Regency, Yogyakarta

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Hill, Brittain E. "Petrogenesis of compositionally distinct silicic volcanoes in the Three Sisters region of the Oregon Cascade Range : the effects of crustal extension on the development of continental arc silicic magmatism /." 1991. http://hdl.handle.net/1957/10395.

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Tsitas, Steven R. "I. The effect of volcanic aerosols on ultraviolet radiation in Antarctica. II. A novel method for enhancing subsurface radar imaging using radar interferometry." Thesis, 1998. https://thesis.library.caltech.edu/7456/1/Tsitas%201998.pdf.

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<p>The theory of radiative transfer is used to explain how a stratospheric aerosol layer may, for large solar zenith angles, increase the flux of UV-B light at the ground. As previous explanations are heuristic and incomplete, I first provide a rigorous and complete explanation of how this occurs. I show that an aerosol layer lying above Antarctica during spring will decrease the integrated daily dose of biologically weighted irradiance, weighted by the erythema action spectrum, by only up to 5%. Thus after a volcanic eruption, life in Antarctica during spring will suffer the combined ef

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Petrosino, S. "Attenuation and velocity structure in the area of Pozzuoli-Solfatara (Campi Flegrei, Italy) for the estimate of local site response." Thesis, 2006. http://hdl.handle.net/2122/3875.

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In the present work I infer the 1D shear-wave velocity model in the volcanic area of Pozzuoli-Solfatara using the dispersion properties of both Rayleigh waves generated by artificial explosions and microtremor. The group-velocity dispersion curves are retrieved from application of the Multiple Filter Technique (MFT) to single-station recordings of air-gun sea shots. Seismic signals are filtered in different frequency bands and the dispersion curves are obtained by evaluating the arrival times of the envelope maxima of the filtered signals. Fundamental and higher modes are carefully recognized

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