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 294 for “"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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A mode-based metric for evaluating global climate models
Climate models are software tools that simulate the climate system and require evaluation to assess their skill, guide their development, and assist in selecting model simulations from among the many different ones available. There are a variety of methods and approaches that can be used to …
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Representation of eddies in climate models by a potential vorticity flux
… equation, z-coordinate atmosphere and ocean models. Determining the transport characteristics of these eddies is fundamental to understanding their effect on the large-scale ocean circulation and global climate. The approach is to transform the primitive equations to yield the altered …
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The use and application of performance metrics with regional climate models
… 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’, between …
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On the use of multivariate statistics to validate global climate models
… those to the counterpart modes in a Global Climate Model (GCM). As a means to accomplish this, a multivariate statistical technique introduced for the first time to the atmospheric sciences, orthogonal Procrustes Target Analysis (PTA) was applied. A four dimensional analysis of the low …
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An origin of North American monsoon retreat biases in climate models
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-08-01
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Representation of eddies in climate models by a potential vorticity flux
… equation, z-coordinate atmosphere and ocean models. Determining the transport characteristics of these eddies is fundamental to understanding their effect on the large-scale ocean circulation and global climate. The approach is to transform the primitive equations to yield the altered …
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Climate models and the validation and presentation of greenhouse change theory
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1990.
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The estimation of the fractional coverage of rainfall in climate models
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1993.
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Development of a quantile-based approach to statistically downscale global climate models
Large-scale general circulation models give us an idea of how the climate may possibly develop over the future century. These models generally simulate the large-scale and global mean climate well; however, when applied to localized regions their output does not provide sufficient detail to perform …
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Innovative water tracers and water isotopes enhance Antarctic research with climate models
… level changes, polar amplification, and palaeoclimate dynamics. While instrumental records are often too short to distinguish anthropogenic impacts from natural variability, Antarctic ice cores preserve valuable information about past climate evolution. As the interpretation of ice core records …
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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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Machine Learning for Bias Correction in Climate Models, with Application to Forecasting Heatwaves
Climate models are an imperfect representation of reality. They simplify physical processes and sacrifice spatial and temporal resolutions to stay within the limits of super-computing, introducing biases that diminish their accuracy. This thesis presents a novel machine-learning framework and model …
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The climatic significance of tropical forest edges and their representation in global climate models
An emerging theme in global climate modelling is whether land covers created in the clearance of tropical humid forests influence water exchange between remnant forest patches and the atmosphere, and, if so, how this affects regional and global water exchange. Fieldwork presented in this thesis …
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Links between climate feedbacks and the large-scale circulation across idealized and complex climate models
… two frameworks by exploring direct links between climate feedbacks and the atmospheric circulation across ensembles of experiments from idealized and complex general circulation models (GCMs). I first demonstrate that an existing, widely-used type of idealized GCM — the dynamical core model — has …
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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 compares …
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Multi-decadal Dynamics of Southern Ocean Open-Ocean Polynyas and Deep Convection: Insights from Climate Models
… play a fundamental role in regulating global climate through its influence on water mass formation, sea ice, and the large-scale overturning circulation. However, its variability, underlying mechanisms, and global impacts remain incompletely understood, particularly on multi-decadal to …
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Exploring last millennium tropical Pacific hydrology: Insights from climate models, proxy data, and proxy system modeling
Author requested closed access (OA after 2yrs) in Vireo ETD system
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Understanding the variability and predictability of seasonal climates over West and Southern Africa using climate models
A good understanding of seasonal climate and the limit to which it can be predicted is crucial in addressing various socio-economic challenges in Africa. However, how to improve the capability of the dynamical models of the climate system in reproducing the regional seasonal climate variability and …
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Long-term variability and change of the Atlantic Meridional Overturning Circulation in a hierarchy of climate models
L'abstract è presente nell'allegato / the abstract is in the attachment
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