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 49 for “"ERA5"”.
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Wind-driven upwelling on the Western Agulhas Bank: a study using ERA5 and WASA3 winds
… compares two different modelled wind products, ERA5 (31 km resolution) and WASA3 (3.33 km resolution), assessing coastal winddriven upwelling in the WAB. Wind-driven upwelling, derived from the higher resolution WASA3 dataset is used to identify and investigate the seasonality of three discrete …
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Rain and RELAMPAGO: analysis of the deep convective storms of central Argentina
… precipitation. IMERG, TRMM 3B42, MERRA2 and ERA5 precipitation datasets were regridded to the same resolution and compared for 3-hourly heavy rainfall (99th and 99.9th percentile) in subtropical South America, which has some of the strongest convective storms on Earth. Seasonal and dirunal …
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Simulating the Characteristics and Influences of the Botswana High over Southern Africa using the Model for Prediction Across Scales (MPAS)
… NOAA; and ERA-Interim reanalysis 5, ERA5). To investigate the response of the Botswana High to ENSO, this thesis carried out two MPAS model experiments. The first model experiment used observed SSTs everywhere during the study period, while the second experiment used observed SSTs …
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A Climatological Analysis of Upper-Tropospheric Velocity Potential Fields using Global Weather Reanalysis, 1958-2020
… (NCEP/NCAR Reanalysis 1, JMA JRA-55, ECMWF ERA5) to calculate and compare upper-tropospheric velocity potential fields on varying temporal scales and quantify any differences that existed between them from 1958 to 2020 over four key regions of variability (Equatorial Africa, Amazon Basin, …
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Development and Evaluation of Contrail Models
… many studies relying on the CoCiP model and the ERA5 weather data for their analyses. This thesis addresses these gaps. The APCEMM model is optimized to achieve a decrease in runtime by 95% and is improved with depth estimation, vertical advection, and atmospheric turbulence modules. A set of 152 …
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The Influence of the North Atlantic Subtropical High on Atmospheric Rivers Over the Eastern United States
… a 4 x 3 regular grid over 250 iterations using ERA5 derived 6-hourly 850 hPa Geopotential Heights ≥ 1535 gpm from 1979-2020. The 12 resulting "nodes" were analyzed with respect to ARs defined by objects of ERA5 derived integrated water vapor transport (IVT) > 500 m-1 s-1 with lengths > 2000 km. …
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Simulating the Dynamics and Influences of the West African Westerly Jet
… Weather Forecast Atmospheric Reanalysis, or ‘ERA5') were used to evaluate 26 CMIP6 models (for 35 years: 1980–2014) and MPAS (for 30 years: 1985–2014). To investigate the sensitivity of the simulated WAWJ to model resolution, two additional simulations were performed with MPAS, focusing on …
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Early summer rainfall variability in the Congo Air Boundary Region
… for Medium-Range Weather Forecast Reanalysis (ERA5) and Climate Hazard Group InfraRed Precipitation with stations (CHIRPS) data. Evaluation of gridded rainfall products in the region found that CHIRPS and ERA5 compare well with limited station data in the region. Using the ERA5 data, results …
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A Study on the Diurnal and Seasonal Cycles of Tropical Cirrus Clouds
… Centre for Medium-Range Weather Forecasts (ERA5) to investigate the diurnal cycle of TCC occurrence in 2016, between 24◦S and 24◦N. Additionally, the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) monthly data, along with ERA5 monthly reanalysis data, are used to …
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Synoptic weather systems over Antarctic sea ice: understanding the link between extratropical cyclones and extreme variability in Antarctic sea-ice concentration
… Medium-Range Weather Forecasts; ERA-Interim and ERA5) and output from a climate model tuned for representing Southern Hemisphere processes, whose atmospheric component is the Conformal Cubic Atmospheric Model (CCAM). To accomplish this, this study is formulated about three main research aims. The …
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Dynamical processes in the evolution of Cut Off Lows over South Africa
… of dynamical processes during COLs. ERA5 data sets were used throughout the study to achieve objectives. Mean seal level pressure surfaces along with the 250 hPa geopotential heights were used to link the existence of COLs with ridging highs, the results shows that COLs that develop …
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Reducción de la incertidumbre en datos de radiación solar para la mejora de la simulación de sistemas fotovoltaicos
… reanalyses should be avoided, but we found that ERA5 and COSMO-REA6 are valid alternatives to satellite-based databases. These results validated the incorporation of both reanalyses in the online simulator PVGIS. However, users should take into account their limitations; primarily the strong …
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Quantifying and reducing the uncertainties in global contrail radiative forcing
… contrails using two reanalysis models - ERA5 and MERRA-2. Using data from 793,044 radiosondes, persistent contrails forming at cruise altitudes in 30°N – 60°N are overestimated by factors of 2.0 and 3.5 for ERA5 and MERRA-2, respectively. I also define the evaporation depth, which …
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A modelling perspective on precipitationin the Indus River Basin: from synopticto Holocene variability
… datasets. This study highlights the quality of ERA5 reanalysis, which is used as a reference in the subsequent chapters. Statistical tools show that more than 80\% of the precipitation in the Upper Indus Basin is related to cross-barrier moisture transport along the Himalayan foothills. The …
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Modelado de procesos smed y tpm con ecuaciones estructurales: estudio del caso de la industria maquiladora mexicana
… o MERRA, pero revelan que nuevos modelos como ERA5 o COSMO-REA6 son una alternativa válida. Estos resultados llevaron a la inclusión de ambas bases de datos en el simulador online PVGIS. Sin embargo, los usuarios de estos productos deben tener en cuenta sus limitaciones; especialmente la …
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A Wall of Smoke: Understanding the Drivers of the June 2023 Canadian Wildfire Smoke Event for New York City
… NYS Mesonet Profiler Network, radiosondes, and ERA5 reanalysis, we document the connection between an anomalous quasi-stationary low pressure system over the northeast and anomalously high surface PM2.5 values approximately 1000 km away from the fires. We conclude that a strong, stationary …
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Ανάπτυξη μεθοδολογίας για την εκτίμηση εγκατάστασης φωτοβολταϊκών συστημάτων σε αστικές περιοχές σε συνάρτηση με τα χαρακτηριστικά της δόμησης και κλιματικές παραμέτρους υπό το πρίσμα της κλιματικής αλλαγής .
… συνδυάζονται με μετεωρολογικές μεταβλητές από το ERA5-Land. Η ενεργειακή απόδοση των Φ/Β υπολογίζεται βάσει του μοντέλου Faiman. Το μελλοντικό δυναμικό των Φ/Β στέγης εκτιμάται με τη χρήση κλιματικών προσομοιώσεων CMIP6 υπό τα σενάρια εκπομπών SSP2-4.5 και SSP5-8.5. Για την προσαρμογή των …
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Economic costs of extreme heat on groundnut production in the Senegal Groundnut Basin
… data from meteorological stations and the ERA5 climate database. Results identify a significant increasing trend in extreme temperatures across the Groundnut Basin and a negative relationship between extreme temperatures and groundnut yield. This leads to financial losses for farmers, with …
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Precipitation prediction over High Mountain Asia using Gaussian processes
… Gaussian processes are applied to downscale ERA5 precipitation over ungauged areas. They are used to auto-regressively combine precipitation datasets with different fidelities, i.e. resolutions and accuracies. This probabilistic multi-fidelity approach differs from previous machine learning …
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Regional dynamical downscaling and analysis of water balance across different regions and time scales
… Analysis (GAR) was developed, by downscaling ERA5 reanalysis data to a grid-spacing of 2 km. The GAR dataset enables detailed analysis of meso-scale atmospheric processes in the GA, validated against in-situ measurements from a network of strategically installed weather stations. The data set …
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