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 20 for “"Gridded data"”.
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Measuring and Forecasting Environmental Conditions From the Perspective of Rocky Intertidal Organisms
… return times to the marine conditions from these data. Results indicate that oceanic influx may influence intertidal community composition.</p> <p><strong>Patterns of risk in intertidal ecosystems:</strong> During terrestrial exposures, intertidal organisms are at risk for temperature stress. A …
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Multi-resolution surface approximation for animation
… addresses the problem of approximating a set of gridded data points obtained from a three-dimensional digitizing system to create a representation with a hierarchical bicubic B-spline surface that is suitable for further manipulation and animation. Chord length parameterization is obtained using …
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Extreme Value Analysis of Rainfall Events Over the Kennedy Space Center Complex
<p>The use of observational datasets to determine the occurrence frequencies of extreme weather events has gained a lot of recent interest due to concerns about the potential regional impacts from global climate change. Extreme-value theory can quantify the return frequency of the most extreme …
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Extreme Value Analysis of Rainfall Events Over the Kennedy Space Center Complex
<p>The use of observational datasets to determine the occurrence frequencies of extreme weather events has gained a lot of recent interest due to concerns about the potential regional impacts from global climate change. Extreme-value theory can quantify the return frequency of the most extreme …
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CHANGES IN FIRE SEASON PRECIPITATION IN IDAHO AND MONTANA FROM 1982-2006
… trends were investigated using daily rainfall data obtained from seventy-six Remote Automated Weather Stations (RAWS) across Idaho and Montana for the period 1982 to 2006. Missing and erroneous values from each station were corrected with gridded data from the North American Regional Reanalysis …
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CHANGES IN FIRE SEASON PRECIPITATION IN IDAHO AND MONTANA FROM 1982-2006
… trends were investigated using daily rainfall data obtained from seventy-six Remote Automated Weather Stations (RAWS) across Idaho and Montana for the period 1982 to 2006. Missing and erroneous values from each station were corrected with gridded data from the North American Regional Reanalysis …
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Composite structure of tropical cyclones in the SW Indian Ocean
… structure as a function of movement using ECMWF gridded data. Analyses of the mean summer climate for the period 1987 1992 shown that conditions conducive to the development ofTCs are present between the latitudes 5° and 15°S. Six westward moving TCs are selected to form the westward moving …
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Defining the Regional and Seasonal Climatic Response of Long Douglas-Fir Tree-Ring Chronologies in Central Mexico
<p>Problems with instrumental climate data and difficulties arising from the distribution of sensitive, long-term tree-ring chronologies across Mexico's complex terrain have made it difficult to model the climate signal of tree-rings in Mexico. The objective of this research is to utilize the …
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Hydrological Analysis of Nicaragua in a Changing Climate
This thesis integrated remote sensing and gridded data products with a small network of precipitation data with the intended goal of conducting a hydrologic assessment in the tropical country of Nicaragua. The objective of chapter 1 was to find a representative gridded precipitation product that …
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Application of Machine Learning Techniques to Forecast Harmful Algal Blooms in Gulf of Mexico
… trained on the 2-Dimensional time series proxy data to provide a forecast of the HABs’ manifestations in the GoM.Our approach analyzes between both spatial and temporal features simultaneously. In addition, the network also helps to fill in the gaps of the time series data along the way. We use …
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Essays in development economics
… footprints in India over time, using satellite data on nighttime lights and historic maps. I propose an instrument for urban shape based on the interaction between topographic obstacles arid mechanically predicted city growth. I then investigate how city shape affects the location choices of …
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Desempenho, limitações e aprimoramento das estimativas de precipitação do IMERG sobre o Nordeste brasileiro: aplicações na Bacia do Parnaíba
… V06 was analyzed by comparison with rain gauge data, using various statistical metrics and focusing on eight extreme precipitation indices. The results indicated satisfactory performance of IMERG V06 for more frequent events but revealed limitations in capturing extremes, especially during dry …
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Southern African climate anomalies, summer rainfall and the Angola low
… of mean features using up-graded new and longer data sets provides a basis for investigating inter-annual and intraseasonal variability. This study presents mean characteristics of peak summer (December, January and February) based on 14 years ECMWF gridded data set. This study is motivated by a …
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Regional dynamical downscaling and analysis of water balance across different regions and time scales
… reanalysis and general circulation model (GCM) data, providing improved data for studying ecological processes. This method ensures physical validity of the data, albeit at high computational costs.This thesis highlights the application and potential added value of RDD in addressing …
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Machine Learning Approaches to Assessing Future Flood & Storm Risk
… change, in particular through the lens of data minimalism. First, we note that with the dawn of the Anthropocene the world's climate is changing, primarily due to human activity. That change is having and will continue to have profound effects on climatic, geological, and biological …
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Mechanisms of inter-annual rainfall variability over tropical highlands of Africa and its predictability potential
… using continental monthly averages of gridded rainfall and temperature and marine environmental data, which consists of monthly averages of sea surface temperature, sea level pressure and zonal and meridional wind components. Rainfall and temperature data are gridded at a resolution of …
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Hydrometeorological Variability over Pakistan
… network of Pakistan. Analysis of this unique data set indicates that increased regional scale humidity, cloud cover, and precipitation, along with decreased net radiation, near-surface wind speed, potential evapotranspiration and river flow, especially during the summer season, represent a …
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Mechanisms of observed spatial heterogeneity in rainfall variability over the winter rainfall zone of South Africa
… climate drivers, using both gauge-based and gridded data. A novel rainfall data quality control and gap-filling procedure involving Generalised Additive Models for Location, Scale and Shape (GAMLSS) is developed to obtain a continuous, high-density 41-year gauge-based rainfall dataset for the …
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Synoptische, diagnostische und numerische Untersuchungen der Intensitätsänderungen von tropischen Wirbelstürmen und Monsuntiefs
… model calculations. The analyses are based on gridded data from the Australian Bureau of Meteorology’s (BMRC’s) Tropical Analysis System, the European Centre for Medium-Range Weather Forecasts (ECMWF) data archive, and the 1990 Tropical Cyclone Motion experiment (TCM-90). The TCM-90 analyses …
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Μέθοδοι εξαγωγής και ψηφιακής επεξεργασίας περιβαλλοντικών σημάτων και εικόνων – Εφαρμογή στην αυτόματη ταξινόμηση χαρτών καιρού
Η συνοπτική ταξινόμηση των συστημάτων καιρού αφορά πληθώρα περιβαλλοντικών εφαρμογών. Προσφάτως, η γνωστική περιοχή για την οποία η συνοπτική ταξινόμηση έχει βαρύνουσα σημασία είναι αυτή της ατμοσφαιρικής ρύπανσης. Η γνώση της συνοπτικής κλιματολογίας μιας περιοχής, επιτρέπει την πρόγνωση και …