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 16 of 16 for “"environmental reconstruction"”.
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Packrat middens: A tool for environmental reconstruction and human adaptation analysis
… for modern midden data, creating a paleoclimate reconstruction. The reliably-dated history of human occupation at four sites on Fort Irwin in the Mojave desert are compared with the paleoclimate reconstruction for an evaluation of corresponding trends. Relative percentages of dietary resources …
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Late quaternary environmental reconstruction and climate modelling in the winter rainfall region of the Western Cape, South Africa
… a Mediterranean climate regime. Acquiring palaeoenvironmental data from this region is imperative in understanding the climatic changes that have occurred during the Late Quaternary, with a view to improved palaeclimatic modelling. The spatial distribution of studies for the Late Quternary in the …
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Large-scale 3D environmental modelling and visualisation for flood hazard warning.
3D environment reconstruction has received great interest in recent years in areas such as city planning, virtual tourism and flood hazard warning. With the rapid development of computer technologies, it has become possible and necessary to develop new methodologies and techniques for real time …
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Triple oxygen isotope measurements by tunable infrared laser direct absorption spectroscopy, and applications to ratite eggshell
… are achieved. Analysis of RES suggests notable environmental differences between the central and southern Namib through time. RES D' 17O signal preservation in the context of global climatic and local environmental influences is investigated by relating obtained data to current triple oxygen …
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Paleoenvironmental reconstruction based on palynological and palynofacies analyses of the Aptian-Albian succession in the Sergipe Basin, northeastern Brazil
… two wells in the Sergipe Basin with the aim of reconstruction the paleoenvironments of the upper Aptian-middle Albian interval. Altogether 19 species of spores, 31 species of pollen grains, 20 species of dinocysts were identified. Moreover, one genus of Acritarcha and one genus of fresh-water …
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Climatic reconstruction using wood charcoal from archaeological sites
… The first is a well established method of environmental reconstruction. This is the first systematic application of Ecologically Diagnostic Analysis and the first application of stable carbon isotope analysis on wood charcoal. Charcoal identification shows that the most common woody species …
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Palaeoenvironments and Palaeoclimates During The Late Holocene in Lake Siscunsi (Colombia), A Multiproxy Perspective
This thesis provides a palaeolimnological and environmental reconstruction of the last ~2,800 years of Lake Siscunsí, located in the Eastern Cordillera of Colombia. This study is mainly based on a high-resolution diatom record in combination with Chlorophyll 𝑎 and other analyses previously done in …
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Geochemical and palynological signals for palaeoenvironmental change in south west England
… technique for the investigation of palaeoenvironmental change in south west England. The method, EDMA (Energy Dispersive X-ray Micro Analysis), is a rapid, non-destructive analysis tool, capable of detecting a large range of geochemical elements. This research examines the most appropriate …
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Modelling the Holocene evolution of coastal gullies on the Isle of Wight
… evidence has frequently been used to infer past environmental conditions, but in recent years the emergence of landscape evolution models (LEMs) has opened the possibility of using numerical modelling as a tool in palaeo-environmental reconstruction. The application of LEMs for this purpose …
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Human Occupation and Changing Environments During the Middle to Later Stone Ages: Soil Micromorphology at the Haua Fteah, Libya
Environmental change has been cited as a key factor in controlling dispersals throughout human evolution. Shifting environments potentially controlled movements of late Middle Stone Age (MSA) and Later Stone Age (LSA) modern human populations during Marine Isotope Stages 5–2 (MIS5–2) both within, …
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Natural and human induced late quaternary environmental change on the Noordhoek Valley, Cape Town, South Africa
… the dynamic depositional environments from which environmental conditions are inferred. Data on spatial changes on land surfaces have also been employed to complement the sedimentary chronology from catchments beyond historic records. Assessment of the extent of human influence on the Noordhoek …
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The Quaternary evolution of the mid-Norwegian continental margin
… long mid-Norwegian continental shelf allow the reconstruction of the ice-sheet configuration over several Quaternary glacial–interglacial cycles. Evidence of iceberg ploughmarks found within the earliest Quaternary Naust surfaces documents a marine-terminating, calving Fennoscandian Ice Sheet …
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Applying dendrochronology visual crossdating techniques to the marine bivalve Arctica islandica and assessing the utility of master growth chronologies as proxies for temperature and secondary productivity in the Gulf of Maine
… relationships between variable growth rates and environmental conditions will be investigated. This research presents preliminary findings in the context of a larger project, with a goal to establish a master shell chronology and to reconstruct hydrographic conditions, including seawater …
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High-resolution stratigraphy of Central and Southern Adriatic Quaternary deposits of sub-Milankovian climate change on Mediterranean circulation
… have been analysed in detail for the paleo-environmental reconstruction, as well. For instance, glacial stages MIS6, MIS8 and MIS10 present peculiar foraminifers’ assemblages, composed by benthic species typical of polar regions and no longer living in the Central Adriatic nowadays. …
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Hydro- and biogeochemical investigations of lake sediments in the Kenyan Rift Valley
Die Seen im kenianischen Riftsystem bieten die einmalige Gelegenheit eine große Bandbreite an hydrochemischen Umweltbedingungen zu studieren, die von Süßwasserseen bis hin zu hochsalinen und alkalinen Seen reichen. Da wenig über die hydro- und biogeochemischen Bedingungen in den darunterliegenden …
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The terrestrial carbon cycle in transition: tracking changes using novel tracers on multiple timescales
… of the Southern Hemisphere. New Zealand’s palaeo-environmental archives (e.g. speleothems and lake sediments) provide a unique opportunity to reconstruct the concentrations and characteristics of DOC under changing climate conditions over centennial/millennial timescales. New Zealand was …