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 28 for “"regional climate models"”.
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Transferability of regional climate models over different climatic domains
In the continuing quest to improve climate model predictions to meet the increasing demand for knowledge on the regional effects of global climate change, it is pertinent to increase our understanding of how the underlying processes of climate are represented in the models we use to make these …
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The use and application of performance metrics with regional climate models
… objective and robust approaches to evaluate regional climate model (RCM) historical skill using performance metrics and to provide guidance to relevant groups as to how best utilise these metrics. Performance metrics are quantitative, scalar measures of the numerical distance, or ’error’, …
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The evaluation of NARCCAP regional climate models using the North American Regional Reanalysis
Understanding the extent of future climate change is highly dependent on the use of climate models to assess the degree and rate of change. More recently, dynamic downscaling has been employed with the use of regional climate models (RCMs) as an alternative to statistical downscaling. However, …
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Investigating the link between southern African droughts and global atmospheric teleconnections using regional climate models
… This study evaluates the capability of Regional Climate Models (RCMs) in simulating the Southern African droughts. It uses the Standardized Precipitation-Evapotranspiration Index (SPEI, computed using rainfall and temperature data) to identify 3-month droughts over Southern Africa, and …
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Assessing the representation of teleconnective drivers of rainfall over Eastern Africa in global and regional climate models and projected future changes
Climate variability is an important characteristic of regional climate, and a subject to significant control from teleconnections. An extended diagnosis of the capacity of climate models to represent remote controls of regional climate (teleconnections) is vital for assessing model-based …
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Multi-Scale Analysis of Climate Change: Case Study of Major Canadian Wine Areas
… projected to continue its rise based on Global Climate Models. This study uses Regional Climate Models to evaluate the effects of climate change on three well-known wine regions in Canada: the Niagara Region, the Annapolis Valley, and the Okanagan Valley. Nineteen models were evaluated against …
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Simulating the characteristics of droughts in Southern Africa
… depends on the ability of the global and regional climate models (GCMs and RCMs) in simulating the characteristics of drought. This thesis presents the characteristics of the Southern African droughts and evaluates the capability of global and regional climate models in simulating these …
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Precipitation prediction over High Mountain Asia using Gaussian processes
… and bias-correct precipitation outputs from models have several limitations, especially over complex terrain. Future precipitation is even more challenging to predict. Improving predictions will enhance hydrological modelling, strengthen water resource management, and ultimately help …
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FLOOD PROJECTION AND ANALYSIS THROUGH STOCHASTIC DOWNSCALING
Due to limitations in the General Circulation Models and Regional Climate Models, high resolution rainfall projections are not available. To this end, this study applies a novel stochastic downscaling method that was originally developed for rainfall nowcasting using radar data. In this study, the …
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Future changes in extreme rainfall events and circulation patterns over southern Africa
… extremes are projected by many global climate models as a response to greenhouse gas increases, and such changes will have significant environmental and social impacts. These impacts are a function of exposure and vulnerability. Hence there is critical need to understand the nature of …
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Climate extremes over the Mid-Atlantic states: a regional approach
… as global temperatures rise, established climate ranges may no longer be applicable, as historic records for extremes such as heat waves and floods may no longer accurately predict the changing future climate. To assess extremes (present-day and future) over the contiguous United States, I …
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Capability of CORDEX RCMs in simulating extreme rainfall events over South africa
… predictions of extreme rainfall events from regional climate models (RCMs) could help reduce the impact of these events. The present study evaluates the ability of nine RCMs in simulating extreme rainfall events over South Africa, focusing on the Western Cape (WC) and east coast (EC) areas. …
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Changes in near-surface winds across Sweden over the past decades - Observations and simulations
… by a combination of anthropogenic activities and climate changes, near- surface terrestrial winds displayed a large decrease in their magnitude in the past decades, named “stilling”, and a recent recovery in their slowdown. Understanding how wind has changed and identifying the factors behind the …
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Evaluation of climate change impacts on the hydrologic response of a sparsely-monitored basin in Sardinia, Italy, through distributed hydrologic simulations and hydrometeorological downscaling
… Mediterranean basins are heavily influenced by climate variability. Modeling these watersheds is difficult due to the complex nature of the hydrologic response as well as the sparseness of hydrometeorological observations. In this work, we first present a strategy to calibrate a distributed …
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Modeling the potential impacts of vegetation change on the future climate of Southern Africa
… alter the projected warming. For the study, two regional climate models (RegCM and WRF) were applied to simulate the present day (1970 - 2005) and the future (2030 - 2065; IPCC RCP 4.5) climate, with and without vegetation change. The study considers two scenarios of vegetation change: the first …
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How Climate Change Could Affect The Water Supply of Potash of Potash Solution Mining in Southern Saskatchewan
… however this could change as a result of climate change and variability. In the last 50 years, since potash mining was introduced to Saskatchewan, there has not been a drought longer than one or two years, but the paleohydrology from tree-rings reveals that droughts within the region can …
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Bias Correction and Downscaling of Climate Model Outputs Required for Impact Assessments of Climate Change in the U.S. Northeast
<p>Global Climate Models (GCMs) are the typical sources of future climate data required for impact assessments of climate change. However, GCM outputs are related to model-related uncertainties and involve a great deal of biases. Bias correction of model outputs is, therefore, necessary before …
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WRF-based dynamical downscaling over High Mountain Asia
… and Glacial Lake Outburst Floods (GLOFs). Under climate change, the frequency of natural hazards is expected to increase, posing further threats to society and human lives in HMA. Due to the lack of meteorological data, the triggering mechanisms of atmospherically induced natural hazards, …
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Impacts of climate changes on the spatiotemporal distribution of precipitation in the western United States
… of the precipitation is changing due to the climate changes. In this dissertation, three studies are conducted to investigate the multi-scale temporal variability of precipitation, the performance of current climate models on this variability, the influence of large-scale ocean oscillations …
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UNCERTAINTY QUANTIFICATION IN DOWNSCALING OF PRECIPITATION EXTREMES AND ITS APPLICATION TO NEW ENGLAND
… essential information for impact assessment of climate change and the development of adaptation strategies, is subject to significant uncertainty, particularly in connection with long-term predictions. The focus of this dissertation is to quantify the uncertainty and reduce the variability in …
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