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 20 of 60 for “"CLIMATIC VARIABILITY"”.
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Nannoplankton as indicators of climatic variability in the Upper Pliocene
… and Pacific Oceans. It has been shown that the variability in Discoaster abundance at low latitudes cannot be attributed solely to changes in sea-surface temperature; discoasters were demonstrated to be suppressed at upwelling sites. In combination with global satellite images of phytoplankton …
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An organic geochemical approach to problems of glacial-interglacial climatic variability
… problems of Late Quaternary glacial-interglacial climatic variability in a 208.7 m hydraulic piston core (DSDP 619) from the Pigmy Basin in the northern Gulf of Mexico. Paired analyses of δ13C-Corg and N/C are consistent with the hypothesis that the sedimentary organic carbon in the Pigmy Basin is …
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An organic geochemical approach to problems of glacial-interglacial climatic variability
Thesis (Ph. D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1988.
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The hydrology of malaria : field observations and mechanistic modeling of the malaria transmission response to environmental climatic variability
… successfully reproduce the observed interannual variability in malaria vector mosquito abundance. The distributed hydrology model operates at high spatial and temporal resolution, and incorporates remotely-sensed data for land cover and topography to simulate the formation and persistence of the …
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Droughts and flooding rains: a fine-resolution reconstruction of climatic variability in Western Victoria, Australia, over the last 1500 years.
The purpose of this study was to reconstruct climatic change of the last two millennia in western Victoria using fossil diatoms as the primary proxy. Due to their short life span and sensitivity to changing water chemistry, diatoms are ideal for reconstructing short term changes in suitable …
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Spatiotemporal Measures of Exposure and Sensitivity to Climatic Variability and Change: The Cases of Modern Sea Level Rise and Southwestern U.S. Bioclimate
… to which climate limited foliar growth. These climatic conditions reduced effects of suboptimal temperatures on foliar growth at lower elevations in winter and higher elevations in summer. They also increased constraints of evapotranspirational demand on foliar growth at lower and middle …
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Stormy records from peat bogs in south-west Sweden : implications for regional climatic variability and vegetation changes during the past 6500 years
… were also used to discriminate between climatic and human induced variations in ASI values, since increased sediment availability resulting from human activity may have affected sand influx into the bogs. The reconstructions of storm activity are similar at both study sites, with peaks …
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Spatial Temporal Analysis Using Hierarchical Bayesian Approach: Effects of Climate Variability on Primary Production of Deciduous Forests of the Northeastern U.S.
… Bayesian models to account for climate variability (anomalies) and short-term weather events (such as drought, heat) to quantify the effects of climatic variability on forest ecosystem productivity. I also explored different lagged effects of climate variability on GPP and found that GPP …
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Evaluating the impact of oceanic/atmospheric teleconnections on historical wildfires in West Virginia (1939--2006)
… the linkages between oscillations and climate variability has the potential to greatly improve seasonal forecasting capabilities. Despite the complexity inherent in local fire regimes, regional fire activity often oscillates in phase with year-to-year climatic variability. This climate-fire …
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Respuesta de la vegetación a variaciones climáticas en praderas y sistemas adehesados mediterráneos : metodología de análisis utilizando datos hiperespectrales y multiespectrales = Vegetation reponses to climatic variability in a Mediterranean grassland and savannah : methodologies of analysis using hyperspectral and multispectral data
Las regiones Mediterráneas están sujetas a alta variabilidad en la precipitación y sequías periódicas. El desarrollo de herramientas para predecir y realizar un seguimiento de la productividad de la vegetación es importante en la producción de pastos y en la agricultura de secano, así como para …
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Essays on Climatic Risks and Vulnerability-Reduction Strategies
… systems; (ii) socio-economic consequences of climatic variability in human systems; and (iii) the design of formal insurance instruments to reduce socio-economic vulnerability to climatic risk, as adaptation strategies. Each part represents an independent study.
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Living with a changing climate: Holocene climate variability and socio-evolutionary trajectories, central Turkey
… The thesis aims to derive a record of past climatic and environmental changes from lake sediment cores and synthesise this with archaeological data in order to reconstruct human-climate interactions at the regional scale. Annually laminated sediment data collected from Nar Gölϋ crater-lake …
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Cold Acclimation Response of Non-native Italian Wall Lizard (Podarcis siculus) Populations from New York and California
<p>Understanding how organisms respond to climatic variability and novel conditions is becoming an increasingly important task for ecologists. For ectotherms in the northern hemisphere, the response to cold is of special interest, considering that poleward range expansion events and increasing …
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In common, nature : an ethnography of climate adaptation in the Lesotho highland
… techniques, designed out of long experience with climatic variability. Through case studies, indigenous resilience strategies are explored, with emphasis on the anarchistic, improvisational nature of traditional ecological knowledge. Future directions for policy makers and practitioners dealing …
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Effects of drought on the growth of young and mature temperate forests in West Virginia
… is known about the role of forest management and climatic variability on the productivity of these forests. The purpose of this study was to determine the variation in aboveground production between two different aged forest stands and to evaluate the effect of drought on inter-annual variation in …
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Variability within the 10-year pollen rain of a seasonal neotropical forest
… effect of seasonal and multiannual environmental variability on the abundance and composition of Neotropical pollen rain was investigated using ten years of seasonal aerial pollen samples from Barro Colorado Island (BCI), Panama. Using canonical correspondence analysis, we identified the …
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Cost and timeliness of alternative nitrogen application methods
… Midwest, is a function of amongst other things, climatic variability. In the current situation of low commodity prices, producers often focus on ways in which they can modify their practices to maximize profits. With nitrogen being the single most important macronutrient for corn production in …
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High-frequency Quaternary climate changes: a key to understanding present and future coastal scenarios
… over the last ~6 ka in response to this variability, likely linked to high-frequency climatic variability (e.g., Roman Warm Period, Medieval Climate Anomaly, Little Ice Age). Finally, saline surface crusts at Sal’e Porcus are currently reworked by seasonal processes, dissolving during …
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The Role of Climatic and Environmental Variability on West Nile Virus in Harris County, Texas, 2006-2007
… study attempts to determine the extent to which climatic variability between the two years played a role. The Mosquito Control Division of Harris County Public Health and Environmental Services gathered the data on vectors and reservoirs. Then using GIS, spatial analysis, and geostatistical tools …
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Investigation of covariability between energy fluxes and CO2 exchange over a semi-arid savanna (Kruger National Park) by Eddie Covariance Technique
… the importance of considering seasonality, climatic variability, and precipitation when studying the surface energy balance and its components. The findings have implications for understanding the complex interactions between ecosystem processes and environmental factors.
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