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.
Results
Showing 1 to 20 of 85 for “"Reanalysis data."”.
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An exploration of South Africa's wind climate using station records and reanalysis data
… The procedure reveals a large proportion of the data are missing and existing data contain numerous errors such that only107 of the original 960 stations passed the quality control criteria. However, data from these107 stations only overlap temporally 2% of the time, which makes the data …
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Using Reanalysis Data For The Prediction Of Seasonal Wind Turbine Power Losses Due To Icing
… Analysis for Research and Applications (MERRA) dataset in conjunction with turbine production data and in-situ wind measurements to investigate six methods of predicting seasonal losses (October-March) due to icing at two sites located in Petersburg, ND and Valley City, ND. The prediction of …
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Stratospheric ozone and Southern Hemisphere climate change : impacts and robustness in CMIP5 models
… across the models. Comparisons are made with the reanalysis data set ERA-Interim. It is found that the magnitudes of the model trends vary dramatically across the CMIP5 ensemble, although between 1960-2000 all models have decreasing austral spring stratospheric ozone and November temperatures and …
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Projecting Future Local Hydroclimatology: A Framework for Local Water Resource Planners in the Animas River Basin at Durango, Colorado
… between, historical upper atmospheric reanalysis data to surface level mean air temperature and precipitation for several climate stations located across the basin. The same technique then increased the resolution of two GCMs from the Intergovernmental Panel on Climate Change (IPCC) …
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Synoptic Scale Weather Patterns Associated with Annual Snow Accumulation Variability in North-Central Greenland
… Maps (SOM) algorithm is applied to a reanalysis forecast model (20th Century Reanalysis Data Version 2 (1870 to 2008)) to identify recurring patterns in the sea level pressure (SLP) field that impact meteorological processes and explain annual variations of accumulation over …
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Alternative metrics for measuring heating trends, with possible connections between the surface and troposphere
… on surface heat trends. Exposure metadata should be improved. The real changes in heat content of the Earth's climate are not fully described by temperature alone. Moist enthalpy is more sensitive to surface vegetation properties and more accurately depicts surface heating than …
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Sea Spray-Mediated Fluxes at Extreme Wind Speeds
… air-sea heat flux over ocean mesoscale eddies in reanalysis data to determine whether persistent sea surface temperature perturbations have a significant effect on the time-averaged turbulent heat flux. The findings show that the ocean mesoscale eddies have a small but detectable influence on the …
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Age of air and the circulation of the stratosphere
… model. We apply the theory to satellite data of sulfur hexafluoride (SF6) and nitrous oxide to derive the first observationally-based estimates of the global meridional overturning circulation strength at all levels in the stratosphere. These two independent global satellite data products …
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Future changes in extreme rainfall events and African easterly waves over West Africa
… in the future. Satellite observations, reanalysis data, and regional climate model (RCA4) simulations (forced with eight global climate simulations) were analysed for the study. The study used the 95th percentile of daily rainfall as a threshold to identify extreme rainfall events, and …
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Age of air and the circulation of the stratosphere
… model. We apply the theory to satellite data of sulfur hexafluoride (SF6 and nitrous oxide to derive the first observationally-based estimates of the global meridional overturning circulation strength at all levels in the stratosphere. These two independent global satellite data products …
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The influence of the Atlantic Meridional Mode on the frequency, duration, and intensity of tropical North Atlantic cyclones
… of the Tropical Atlantic Ocean (TAO). Synthetic data generated from computer simulations as well as actual reanalysis data from North Atlantic Basin tropical storms was examined. A moderate correlation exists between increased (decreased) North Atlantic tropical storm activity and the high (low) …
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Regional summer climate variability and change over North America in the 20th Century
… the MIT Regional Climate Model (MRCM). New input data sets are used in order to represent contemporaneous and evolving lateral and surface boundary conditions. Studies in the past have shown a link between LULC changes and regional/local climate change, and in particular cropland-influenced …
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Interactions Between Dust and Ecosystem, and Landscape at Multiple Scales
… implementing a satellite-based total vegetation dataset, which includes NPV, into a regional atmospheric chemistry model. Simulations of the entire year 2016 over the conterminous United States demonstrate that NPV reduces dust emissions by 10-70% from most dust sources in the southwest, …
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A Diagnostic and Dynamical Study of the Midwinter Minimum of the Pacific Storm Track
… of dry dynamics. Diagnosing 40-year NCEP/NCAR reanalysis data, we examined the frequency of occurrence of MWMIN and the structural features in the planetary-scale flow associated with MWMIN. The results suggest a hypothesis that a significant enhancement of the barotropic damping relative to …
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Simulating the characteristics of tropical cyclones over the South West Indian Ocean using an adaptive Stretched-Grid Global Climate Model
… Climatology Project (GPCP) satellite data, and ERA-Interim (ERAINT) reanalysis data. The study also considers the impact of El Niño Southern Oscillation (ENSO), Indian Ocean Dipole (IOD) and the South Atlantic Subtropical Dipole (SASD) on TC counts over the SWIO.
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AI-informed model analogs for subseasonal-to-seasonal prediction
… skill metrics on both climate model and reanalysis data. We find the analog ensembles built using the AI-informed approach also produce better predictions of temperature extremes and exhibit more reliable forecast uncertainty. Finally, by using an interpretable-AI framework, we analyze …
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The effect of weather and climate change on the operation of meshed power networks
… in climate. To complete this analysis outage datasets, provided by the transmission companies of GB, were acquired to help understand what the current effects of weather are. It was determined that the three main weather types that cause weather related outages on the GB transmission network …
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Quantifying supraglacial debris thickness at local to regional scales
… general paucity of supraglacial debris thickness data. This thesis investigates methods of quantifying supraglacial debris thickness at local to regional scales. First, it makes in-situ field measurements of debris thickness at the local scale on glaciers in the Himalaya and the European Alps by …
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Cluster-enhanced Ensemble Learning for Mapping Surface Ozone in China
… research integrates multisource observational data from 2003 to 2019 across China, constructing a comprehensive meteorological-environmental dataset that includes ERA5 meteorological reanalysis data, CAMS and MERRA2 chemical reanalysis data, MODIS land use and leaf area index data, MODIS …
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Characterisations of Different El Nino Types, their Physical Causes and Predictions
… explain differences in model behaviour. Based on reanalysis data, ENs are divided into Central Pacific (CPEN), Eastern Pacific (EPEN), and Hybrid (HBEN). ENs are found to form a continuous spectrum of events with CPEN and EPEN as its end members depending on: (1) the Western Pacific subsurface …
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