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Dissertations / Theses on the topic 'Physical geography from Guatemala'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2025

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1

Lupro, Michael Mooradian. "Signs of Popular Ecology in the Ecotourism Landscape Near Tikal National Park, Guatemala." PDXScholar, 2000. https://pdxscholar.library.pdx.edu/open_access_etds/2453.

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Ecotourism is a common conservation and development strategy in the Maya, Forest region. New sites of ecotourism consumption, such as El Rematé near Tikal National Park in Guatemala, are developing in response to consumer demand for budget accommodations in this attractive cultural and natural setting. This study analyzes new ecotourism infrastructure developments in El Rematé for signs that this tourism draws on ecological imagery as expressed in popular media - or popular ecology - not on the natural and cultural ecology of the region that is the target of international conservation efforts.

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2

LeBlanc, Michelle. "A diatom-based Holocene paleoenvironmental record from a lake on Boothia Peninsula, central mid-Arctic, Nunavut, Canada." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6414.

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An important source of information about climate change comes from sedimentary deposits from the arctic region. However, there are few lacustrine fossil records from the central mid Arctic region of Canada. A 485 cm sediment core, from a lake unofficially called JR01, Boothia Peninsula, Nunavut, yielded a high-resolution diatom record. Five radiocarbon dates provided the chronology. Three distinct zones are revealed in the relative percent abundance and diatom concentration diagrams. A more diverse and productive flora in the first zone implies warmer temperatures in the middle Holocene. A com

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3

Stevenson, Paula J. "A theoretical basis and methodology for the quantitative evaluation of thematic map series from SAR/INSAR Data /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486474078048843.

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4

Agosta, Sarah. "Preservation and diagenesis in ancient speleothems: evidence from Bear Cave, Yukon Territory." Thesis, University of Ottawa (Canada), 2010. http://hdl.handle.net/10393/28844.

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Speleothems are rare in high-latitude and high-altitude caves, which is why Bear Cave in the north-western Yukon Territory is particularly unique, as it houses some of the oldest and highest latitude speleothem in the world. In this study, a detailed petrographic and geochemical study was conducted along the profile of a 68-cm long late-Miocene flowstone from Bear Cave (BC1) to reveal the processes that took place at the time of deposition, in addition to those that followed, in aims to determine its paleoclimatic suitability. These studies suggest that softer facies are generally representati

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5

Botting, Joseph Peter. "Palaeoecology and systematics of Ordovician biotas from Welsh volcaniclastic deposits." Thesis, University of Birmingham, 2000. http://etheses.bham.ac.uk//id/eprint/5409/.

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The effects of explosive volcanism on local ecosystems are investigated in Middle Ordovician siliciclastics from the Welsh Basin. Bulk sampling analysis has provided quantitative data, regarding population proportions and abundance, following ash deposition in nearshore, shallow dysaerobic basin, and deeper basinal facies. Consistent ecological effects include the destruction of small sessile benthos by rapid burial, followed by re-establishment of mobile and opportunistic taxa, and a bimodal, planktic-benthic bloom in dysaerobic facies. The results are explained through vertical circulation i

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6

Demirkesen, Ali Can. "Constructing a prior information base for river mapping from digital images and DEMS by an advanced image interpretation system /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486399160105487.

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7

Klaucke, Ingo. "The submarine drainage system of the Labrador Sea : result of glacial input from the Laurentide icesheet." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29064.

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Side-scan sonar imagery, 40 in$ sp3$ sleeve gun and 3.5 kHz high-resolution profiles reveal a dichotomy of the upper Labrador Slope into (i) a low-relief sector off Hudson Strait that is dominated by mass-transport deposits resulting from the direct input of subglacially derived debris, and (ii) a high-relief sector to the south resulting mainly from deposition out of turbid surface plumes, and headward canyon erosion. This dichotomy continues in the Labrador Basin, where the leveed Northwest Atlantic Mid-Ocean Channel (NAMOC) is flanked by a sandy submarine braidplain in the east, which is th

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8

Wang, Jian. "Carbon Dioxide and Methane Emissions from a California Salt Marsh." Thesis, University of California, Santa Barbara, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10687609.

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<p> Wetland carbon sequestration is offset by carbon dioxide (CO<sub>2</sub>) and methane (CH<sub>4</sub>) emissions for which the magnitudes remain coarsely constrained. To better understand the spatial and temporal variations of gaseous carbon fluxes from marsh soils in a Mediterranean climate, I collected air and soil samples over the course of 10 months at Carpinteria Salt Marsh Reserve (CSMR) located in the County of Santa Barbara, California. The CSMR consists of four zones characterized by differences in elevation, tidal regime, soil properties, and vegetation. Twelve static chambers we

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Couture, Nicole. "Fluxes of soil organic carbon from eroding permafrost coasts, Canadian Beaufort Sea." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=92229.

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Resolving uncertainties about the cycling of organic carbon in the world's oceans is particularly crucial in the Arctic because it is the locus of deep water formation, as well as rapid environmental change. The specific goal of this thesis was to quantify the flux of soil organic carbon (SOC) to the Arctic Ocean due to erosion along the Yukon Coastal Plain. Ground ice and SOC within coastal sediments, and the current and future fluxes of carbon were examined in detail.<br>An evaluation of the volume of ground ice showed it to be a significant constituent of coastal bluffs. The amount of it

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10

Sommerville, Anne Amanda. "Luminescence dating of wind blown sands from archaeological sites in northern Scotland." Thesis, University of Glasgow, 2003. http://theses.gla.ac.uk/2934/.

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The sheltered bays of the Orkney Islands are backed by extensive dune systems that commonly contain archaeological sites, many of which now protrude from cliffed sections due to coastal erosion. In an area where other dating techniques are often precluded due to a lack of organic dating material, this research establishes that optically stimulated luminescence (OSL) dating can provide a viable and robust alternative by dating wind blown sands within the sites to constrain the archaeological age. Since this is the case, the OSL chronology can also be applied to natural sites where no archaeolog

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Westwood, Rachel Fiona. "Seismic monitoring and multiphysics modelling of ground-borne vibrations from small wind turbines." Thesis, Keele University, 2012. http://eprints.keele.ac.uk/3272/.

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Wind energy is planned to play a major role in UK and Scottish Governments achieving renewable energy targets. The Southern Uplands of Scotland are a prime resource for wind and also home to the Eskdalemuir seismological station, a component of the International Monitoring System of the Comprehensive Nuclear-Test Ban Treaty. Previous work demonstrated that large wind turbines generate vibrations at frequencies significant to Eskdalemuir which are transferred into the ground and can be detected at many kilometres. In order to protect its capabilities, a 50 km consultation zone is enforced aroun

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12

Fleming, Edward James. "Magnetic, structural and sedimentological analysis of glacial sediments : insights from modern, Quaternary and neoproterozoic environments." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/4883/.

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Glacial sediments, particularly diamicts, can be ambiguous to interpret. Fabric analyses, such as anisotropy of magnetic susceptibility (AMS), have been shown to provide specific information on the formation and subsequent deformation of glacial sediments. In this thesis, detailed investigations utilising the AMS technique have been combined with traditional sedimentological and structural techniques, to help resolve a number of current problems in glacial geology. At the same time, limitations of such uses of AMS have been established. In the modern environment (Tunabreen, Svalbard), magnetic

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13

Meadows, Tim. "Forecasting long-term sediment yield from the upper North Fork Toutle River, Mount St. Helens, USA." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/27800/.

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The Toutle-Cowlitz River system experienced dramatic landscape disturbance during the catastrophic eruption of Mount St Helens on May 18, 1980. The eruption was triggered by a 2.5 km3 debris avalanche which buried the upper 60 km2 of the North Fork Toutle River catchment to an average depth of 45 m and obliterated the surface drainage network. Subsequent channel response on the debris avalanche, dominated by incision and widening, has delivered significant quantities of sediment to downstream reaches where resultant deposition has reduced channel capacity and heightened flood risk. Estimates o

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14

Reidy, Liam Michael. "Lake Sediments as Evidence of Natural and Human-Induced Environmental Change from California and Nevada." Thesis, University of California, Berkeley, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3616388.

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<p> This study focuses on the history of natural and human-induced environmental change as recorded in the sediments of two lakes: Mountain Lake in the Presidio National Park, San Francisco, California and Big Soda Lake, near Fallon, Churchill County, Nevada. The records of these lakes examined in this study cover approximately the last 2,000 years. Sediment cores from the lakes were dated with radiocarbon, lead-210, plutonium 240/239, tephrachronology, and the first appearance of non-native pollen types. The cores were analyzed to determine changes in stable isotopes (carbon and oxygen), s

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15

Poisson, Alexandre. "Implications of Modern Non-Equilibrium Thermodynamics for Georgescu-Roegen's Macro-Economics: Lessons from a Comprehensive Historical Review." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103475.

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In the early 1970s, mathematician and economist Nicolas Georgescu-Roegen developed an alternative framework to macro-economics (his hourglass model) based on two principles of classical thermodynamics applied to the earth-system as a whole. The new model led him to the radical conclusion that "not only growth, but also a zero-growth state, nay, even a declining state which does not converge toward annihilation, cannot exist forever in a finite environment" (Georgescu-Roegen 1976, p.23). Georgescu-Roegen's novel approach long served as a devastating critique of standard neoclassical growth theo

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Dean, J. R. "Stable isotope analysis and U-Th dating of late glacial and Holocene lacustrine sediments from central Turkey." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14090/.

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Water is a politically sensitive resource in the Near East and water stress is increasing. It is therefore vital that there is a strong understanding of past hydrological variability, so that the drivers of change can be better understood, and so that the links between the palaeoclimate and archaeological records in this key region in the development of human civilisation can be investigated. To be of most use, this requires high resolution records and a good understanding of palaeoseasonality. A sediment sequence spanning ~14,000 years has been retrieved from Nar Gölü, a lake in central Turke

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Hernandez, Ayala Jose J. "Spatial and Temporal Changes in Precipitation in Puerto Rico from 1956-2010." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1333979245.

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18

Alam, Mohammed Salim. "Total radical production and degradation products from Alkene Ozonolysis." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/1733/.

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The gas-phase reactions of ozone with alkenes can be significant sources of free radicals (OH, HO2 and RO2) in the Earth’s atmosphere. While there are a number of quantitative indirect OH and HO2 yield measurements from ozonolysis in the literature, obtained, for example, through the use of radical tracer / scavenger species, few direct observations have been reported. This thesis presents the first direct measurements of OH and HO2 by Laser Induced Fluorescence for a homologous series of alkenes. The radical and stable products from ethene, propene, 1-butene, 2 methylpropene, cis-2-butene, tr

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Mallon, Gunnar. "Patterns of mid-Holocene climate change : evidence from the peat archive." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/349381/.

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With growing concerns over future climate change, the need to understand past climate variability has become an important topic of research. In this thesis, a gap in knowledge of the transition to modern climatic conditions during the mid-Holocene is identified and addressed. Mid-Holocene atmospheric moisture availability has been reconstructed from five raised mires (Kortlandamossen, Tore Hill Moss, Raeburn Flow, Gällseredsmossen, and Misten Bog) located on geographical and climatological gradients across northwest Europe. In this thesis, a new testate amoebae-based palaeohydrological transfe

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20

Courtney, Mustaphi Colin John. "Analysis of laminated sediments from Lake DV09, northern Devon Island, Nunavut, Canada." Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28123.

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A 147cm sediment core from Lake DV09, northern Devon Island, Nunavut, Canada (75° 34'34"N, 89° 18'55"W) contains annually-laminated (varved) sediments, providing a 1600-year record of climate variability. A minerogenic lamina deposited during the annual thaw period and a thin deposit of organic matter deposited during the summer and through the winter, together form a clastic-organic couplet each year. The thinnest varves occur from AD800-1050, and the thickest from AD1100-1300, during the Medieval Warm Period. The relative sediment density is also highest during this period suggesting

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21

Kuplich, Tatiana Mora. "Temporal, spatial, spectral and polarisation characteristics of the SAR backscatter from regenerating tropical forests." Thesis, University of Southampton, 2001. https://eprints.soton.ac.uk/192777/.

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The establishment of an accurate global carbon budget and the consequent ability to understand and predict future environmental change is dependent on knowing the strength of terrestrial sinks and sources of carbon. Regenerating tropical forests are one of the major terrestrial carbon sinks as they are found growing quickly and are sequestering carbon from the atmosphere. Total forest biomass (which includes above and below ground living mass of plants and litter) is a measure of terrestrial vegetation carbon content. It follows that to determine the strength of terrestrial carbon sinks we req

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Parker, Natalie Olwyn. "Distinguishing flood frequency and magnitude in the morphodynamics and sedimentology of rivers : insights from the South Saskatchewan River, Canada." Thesis, University of Birmingham, 2010. http://etheses.bham.ac.uk//id/eprint/1169/.

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The impact of a 1 in 40 year flood on the morphology and sedimentology of the sandy braided South Saskatchewan River, Canada was assessed. Comparison of 2004 - 2007 repeat GPR surveys and the production of DEMs of difference allowed quantification of the initial and long-term 2005 flood impact on reach morphology and sedimentology. Main results show that even though a significant initial morphological impact was caused due to the flood through net erosion and channel incision across Bar A, subsequent low-magnitude high-frequency floods were able to rework morphology due to the ability to trans

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Li, Ran. "Tracking Microplastics from Artificial Football Fields to Stormwater Systems." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-170290.

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Microplastic pollution as a global environment problem in marine systems has substantially raised public concern in recent years. In 2016, the Swedish Environmental Protection Agency performed a study about potential sources and pathways of microplastics spreading to the marine environment. Microplastics from artificial turfs have been recognized as the second most important source of microplastic emission in Sweden. Between 1640 to 2460 tons per year of microplastics are estimated to be lost from artificial turfs. The lost microplastics are potentially transported to stormwater wells by runof

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Schannwell, Clemens. "Modelling ice dynamic sea-level rise from the Antarctic Peninsula Ice Sheet." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7775/.

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The Antarctic Peninsula (AP) has been one of the most rapidly warming regions on this planet. This warming has been accompanied by major glaciological changes such as tidewater glacier retreat, ice-shelf retreat and collapse alongside acceleration of outlet glaciers in response to ice-shelf removal. As faster owing glaciers deliver more ice from the ice sheet's interior to the margins, the AP has been identified as an important contributor to global sea-level rise (SLR). However, comprehensible SLR projections of the AP induced by ice dynamics over the next three centuries are still lacking. I

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Smith, Benjamin Anthony Visocchi. "Assessment of carbon and nutrient export from a peatland windfarm construction site." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7080/.

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The full extent of a landscape’s resilience to the environmental impact of siting wind-based renewables on peats is currently unknown. This research explores if windfarm construction activities have caused disturbance by investigating; time series of fluvial carbon (C) and nutrient concentrations; constructing aquatic organic C fluxes, before, during and after the windfarm construction period. Additionally, C sequestration rates of peat and nearby lake sediments (Loch Brora) were calculated to provide a historical context to, i) calculated aquatic C fluxes and ii) sediment export from surround

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Algesten, Grete. "Regulation of carbon dioxide emission from Swedish boreal lakes and the Gulf of Bothnia." Doctoral thesis, Umeå : Univ, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-453.

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van, Woerkom Anne. "Ancient DNA from soils and sediments from the Krigstjärn area, northern Sweden : Preservation and detection of Holocene mammal sedaDNA." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-127680.

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Current knowledge of past vegetation and faunal diversity has been based on pollen and macrofossil analysis from lake sediments. The innovative method of sedimentary ancient DNA (sedaDNA) is a promising, complementary proxy to reconstruct information about past environments. However, to what extent animal DNA can be extracted from old sediments and soils has not been frequently studied. This study explored if ancient DNA of moose (Alces alces), reindeer (Rangifer tarangus), goat (Capra aegagrus) and plants could be extracted from millennia old lake sediments of Lake Krigstjärn and archaeologic

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Strandberg, Nichola. "The Vegetational and Environmental Development of Lina Mire, Gotland from 6900-400 BC." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-145062.

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Lina Mire, Gotland, is an area of archaeological significance and has a complex history of shoreline displacement. Archaeologists suspect that Lina Mire was once part of an important inland water system which connected the Littorina Sea with central Gotland. This study investigates vegetational and palaeoenvironmental changes of the Lina Mire area between 6900 – 400 BC (8850 – 2350 cal years BP) in order to better understand how the area has developed and how humans have impacted the vegetation. Pollen analysis, C/N ratios, organic matter and carbon content measurements were conducted. The chr

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Herrera, Brianne. "Genomic and Climatic Effects on Human Crania from South America: A Comparative Microevolutionary Approach." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu155536516598977.

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30

Felstead, Nicholas James. "Palaeoenvironmental reconstruction and geoarchaeology of the Cuatro Ciénegas Basin, NE Mexico, from the late Pleistocene to the present." Thesis, Liverpool John Moores University, 2012. http://researchonline.ljmu.ac.uk/6171/.

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With over 200 pools, lakes and rivers supporting over 70 species of endemic flora and fauna, the Cuatro Cienegas Basin, Coahuila, NE Mexico is an extremely important and extensively studied area in terms of conservation. The palaeoenvironment, however, is relatively understudied with only two reconstructions published to date - Meyer [1973] and Minckley and Jackson [2008]. This project has analysed a 15 m carbonate sediment core for multi-proxy palaeoenvironmental information and combined this with stable isotope, modern hydrological and geoarchaeological information in the Cuatro Cienegas Bas

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Wallace, Cynthia S. A. "Extracting temporal and spatial information from remotely sensed data for mapping wildlife habitat." Diss., The University of Arizona, 2002. http://hdl.handle.net/10150/280220.

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The research accomplished in this dissertation used both mathematical and statistical techniques to extract and evaluate measures of landscape temporal dynamics and spatial structure from remotely sensed data for the purpose of mapping wildlife habitat. By coupling the landscape measures gleaned from the remotely sensed data with various sets of animal sightings and population data, effective models of habitat preference were created. Measures of temporal dynamics of vegetation greenness as measured by National Oceanographic and Atmospheric Administration's Advanced Very High Resolution Radiom

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Winchester, Jesse N. F. "Emissions From Concentrated Animal Feeding Operations During Wet and Dry Periods in the Southeastern United States." TopSCHOLAR®, 2015. http://digitalcommons.wku.edu/theses/1451.

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Air quality modeling is a recent development in atmospheric science dedicated to simulating the characteristics of surface emissions within the context of a variety of meteorological conditions. In western Kentucky, there are several concentrated animal feeding operations (CAFOs) that emit a variety of gases, including sulfur dioxide (SO2). The hypothesis was that the concentration and spread of SO2 emissions from these sources would differ between wet and dry periods over the CAFO locations. In this thesis, point emissions from locations representing CAFOs in western Kentucky and the transit

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Sjöström, Jenny. "Late Holocene palaeoenvironmental reconstruction on a peat sequence from northeastern South Africa, using grass phytoliths as main proxy." Thesis, Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-91882.

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Contemporary a geographical imbalance of where palaeoclimatological studies have been undertaken exists, where the majority of palaeodata is based on studies from the northernhemisphere. Multiproxy analysis was performed on a peat core from Lydenburg, north-eastern Mpumalanga, covering the last 1.600 years. Proxy focus was put on fossil grassphytoliths. A general drying trend can be noted from AD 400 to 1000, followed by moremesic conditions around AD 1200. The increasingly mesic conditions were interrupted by asignificantly drier period between c. AD 1250 to 1350. This part of the Lydenburg s

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Hanses, Lena. "I never tried the swings before : Perspectives on urban greenspace from children with profound intellectual and multiple disabilities." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-170474.

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To achieve the United Nations Sustainable Development Goal 11.7 aiming to create inclusiveand accessible greenspaces, there is need to involve children with profound intellectual andmultiple disabilities in research and planning practices. The aim of this study is to explore whatexperiences of accessibility children with profound intellectual and multiple disabilities haveof greenspace. Through the qualitative method of go along interviews using augmentative andalternative communication, such as pictures and sign language, children provide their opinionsabout the public park Långbroparken in s

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Baker, Ted W. "Water Quality Impacts from Agricultural Land-Use in the Karst Groundwater Basin of Qingmuguan, Chongqing, China." TopSCHOLAR®, 2008. http://digitalcommons.wku.edu/theses/37.

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Karst regions are composed of soluble rock, often limestone, which leads to the formation of fissures, sinkholes and water flow conduits such as caves. Pollutants in karst waters tend to be quickly directed and concentrated into these subsurface conduits. As a result of this and other factors, water resources are especially sensitive to contamination and pollution in karst areas. Pollutant concentrations going into fluvial systems travelling through the subsurface in karst areas are often very similar to the concentrations arriving at outlets such as springs. Areas connected by karst conduit f

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Drake, Alexandra. "Separating Acetate, Formate and MSA from natural samples using ion chromatography." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-206302.

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Anjoner från de tre korta organiska syrorna: acetat, format och MSA är intressanta att mäta då de kan användas för olika sorters miljöstudier. Jonkromatografen vid Institutionen för Geovetenskaper kan för närvarande inte skilja på dessa tre ämnen, därför utvecklades sex nya metoder i detta projekt för att lösa problemet. Metod 5 visade sig vara den bästa, där acetat och format separerades. Resultatet ansågs vara bra, även om MSA inte separerades. Metod 5 testades sedan på ett par naturliga prover; vatten-, snö- och isprover. Alla dessa prover visade en större mängd av format än acetat, som i v

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Wheelock-Davis, Emily J. "Elevation Changes in Greenland over Two Decades from Cross-Platform LIDAR Analysis." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366223499.

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Haxhija, Sindi. "An institutional and cultural perspective on 'soft' spaces of cooperation : Findings from a transboundary Dutch-German cooperation network." Thesis, Blekinge Tekniska Högskola, Institutionen för fysisk planering, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-16757.

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Following the necessity for spatial planning to focus on ‘what works’ in terms of implementation and policy delivery, during the last decade, the notion ‘soft’ spaces of cooperation have been in the spotlight of many academics working on territorial cooperation units. ‘Soft’ spaces of cooperation have been introduced mainly to explain what was happening for real through the continuous attempts to promote new policy scales, initially through the device of fuzzy boundaries. However, despite the necessity to address interests beyond existing rigid administrative boundaries, still issues related t

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Hutchison, Sean Taylor. "Eastern Deciduous Forest Phenology and Vegetative Vigor Trends From 2000 to 2013, Mammoth Cave National Park, KY." TopSCHOLAR®, 2013. http://digitalcommons.wku.edu/theses/1312.

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Global climate change is predicted to affect environmental systems at the midlatitudes, but the scope, severity, and outcomes of these impacts are yet to be fully understood. This study focuses on the implications of short-term climate variability for forests in central Kentucky. Using a Normalized Difference Vegetation Index (NDVI) calculated from MODerate-Resolution Imaging Spectroradiometer (MODIS) instrument data, the photosynthetic activity of vegetation at Mammoth Cave National Park (MACA) is tracked from 2000 to 2013. Three methods were employed to examine the changes and climate influe

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Klaus, Marcus. "Land use effects on greenhouse gas emissions from boreal inland waters." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-134767.

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Anthropogenic activities perturb the global carbon and nitrogen cycle with large implications for the earth’s climate. Land use activities deliver excess carbon and nitrogen to aquatic ecosystems. In the boreal biome, this is mainly due to forestry and atmospheric deposition. Yet, impacts of these anthropogenically mediated inputs of carbon and nitrogen on the processing and emissions of greenhouse gases from recipient streams and lakes are largely unknown. Understanding the ecosystem-scale response of aquatic greenhouse gas cycling to land use activities is critical to better predict anthropo

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Ekelund, Åsa. "Metal mobility and transport from an oil-shale mine, Lake Nõmmejärv, Estonia." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-195364.

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Mining activities have a large impact on the environment, for example by the release of heavy metals from acid mine drainage and erosion of mine waste. North-eastern Estonia has the largest commercially exploited oil-shale deposit in the world. Waste from the mining processes have led to contamination of groundwater and streams polluted by phenols, oil products, sulphates and heavy metals. This thesis concerns the metal mobility from oil-shale mines in north-eastern Estonia, through water flow in the drainage system directed into Lake Nõmmejärv, which acts as a sedimentation basin for the mini

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Hopkins, Chelsea Elizabeth. "Beryllium-10 derived erosion rates from the Hangay Mountains, Mongolia: landscape evolution in a periglacially-dominated continental interior." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45799.

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Terrestrial cosmogenic nuclides such as beryllium-10 have recently been used as a way to determine basin-average erosion rates around the world. These erosion rates are useful to geomorphologists investigating landscape evolution. The Hangay Mountains in Mongolia are a prime location to use beryllium-10 because of the granitic rocks that provide the quartz needed for cosmogenic analysis as well as the lack of observed evidence of recent or old mass wasting events that mobilize sediment and bedrock with much lower cosmogenic concentrations that cause underestimations of erosion rates. Basin-av

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Lam, Norris. "Modeling rating curves from close-range remote sensing data : Application of laser and acoustic ranging instruments for capturing stream channel topography." Doctoral thesis, Stockholms universitet, Institutionen för naturgeografi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-142135.

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A rating curve provides a functional relationship between water height (i.e. stage) and discharge at a specified cross-section in a river. Used in combination with a time series of stage, rating curves become one of the central components for generating continuous records of streamflow. Since developing and maintaining rating curves can be time consuming, hydraulic models have shown potential to reduce the effort required for developing rating curves. A central challenge with modeling procedures, however, is the acquisition of accurate stream channel and floodplain topography. From this perspe

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Ansar, Atif. "'New departures' in infrastructure provision : an ongoing evolution away from physical assets to user needs." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:1f938334-bf4e-45cc-81fc-be50afa5dc9e.

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Infrastructure—communications, energy, transport, waste, and water networks—is critical for economic activity and social well-being. Practitioners, politicians, and economists advocate high levels of investment in infrastructure under the rubric of 'planning for growth' (or the 'push' paradigm). This paradigm relies on complex public-private arrangements in the name of public interest. These seemingly reasonable arrangements are, however, not delivering their promise. Evidence shows that the needs of infrastructure users in rich and poor countries are not being met, many private providers of i

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Ham, Brian. "Using Conservative and Biological Tracers to Better Understand the Transport of Agricultural Contaminants from Soil Water through the Epikarstic Zone." TopSCHOLAR®, 2009. http://digitalcommons.wku.edu/theses/133.

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Agriculture contamination is very common in karst systems due to the vulnerability of these aquifers. Animal waste is often spread across crop land to enrich the soil with nitrates and phosphates. Herbicides and pesticides are also applied to the crops. The transport of these pollutants through the soil and epikarst is a difficult process to monitor due to the complex, heterogeneous behavior of the groundwater as it makes its way down to the aquifer below. An experimental site at Crumps Cave lended a unique opportunity to monitor the vadose zone at a waterfall in the cave below. A previous

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Atencio, Matthew. "'Crunk', 'cracking' and 'choreographies' the place and meaning of health and physical activity in the lives of young people from culturally diverse urban neighborhoods /." Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20061211.120420/index.html.

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Lagerbäck, Adolphi Emma. "Optically Stimulated Luminescence Dating and Last Glacial Climate Reconstruction from the Lingtai Loess Section, Chinese Loess Plateau." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-296666.

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High resolution dating of loess on the Chinese Loess Plateau (CLP) using Optically Stimulated Luminescence (OSL) has increased the understanding of past monsoon climate but also raised questions regarding dust mass accumulation rate (MAR), the presence of disturbances or gaps in the sediment record, a possible teleconnection between North Atlantic and East Asian monsoon climate, and whether these events are due to climate variability, local settings, or age model uncertainties. This study undertakes a detailed (<20cm sampling resolution) -OSL investigation of the Lingtai section to create a

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Fagerström, Viktor. "Structure from Motion, a Cheaper Alternative for Three-Dimensional Modeling in Earth Science." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-352372.

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In this report, two methods for three-dimensional modeling are evaluated against each other. The first method is terrestrial laser scanning (LiDAR) that uses a laser beam to record the surrounding environment, and the second one is called Structure from Motion (SfM). The SfM technique works on the same bases as photogrammetry, which is that an object of interest is photographed from multiple angles with overlapping images and mutual points are identified and used to create a three- dimensional model. Since both the equipment and the software used to produce LiDAR models are very expensive the

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Jonsson, Christina E. "Holocene climate and atmospheric circulation changes in northern Fennoscandia interpretations from lacustrine oxygen isotope records /." Doctoral thesis, Stockholm : Department of physical geography and quaternary geology, Stockholm University, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-29343.

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Diss. (sammanfattning) Stockholm : Stockholms universitet, 2009.<br>At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 1: In press. Paper 2: Submitted. Paper 5: In progress.

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Hoang, Cham, and Moa Stangefelt. "Possible Impact from Alaskan Forest Fires on Glaciers of St. Elias Mountains, Yukon Canada." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-256366.

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How great potential effect does the Black carbon emitted from the boreal forest fire region of Alaska have on the retreating glaciers of the St. Elias Mountains? In this study climate and forest fire history data of Alaska was run in the HYSPLIT wind trajectory model to generate trajectories originated from large occurring fires in Alaska from 2005 to 2014. Results show a small percentage of trajectories passing the St. Elias Mountains and an expected pattern of a correlation between passing trajectories and density of amount forest fires. Interdisciplinary climate research is indicating an in

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