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 “"Earth System Models"”.
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Effective reuse of coupling technologies for Earth System Models
Designing and implementing coupled Earth System Models (ESMs) is a challenge for climate scientists and software engineers alike. Coupled models incorporate two or more independent numerical models into a single application, allowing for the simulation of complex feedback effects. As ESMs increase …
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Uncertainty Quantification in Earth System Models Using Polynomial Chaos Expansions
… work explores stochastic responses of various earth system models to different random sources, using polynomial chaos (PC) approaches. The following earth systems are considered, namely the HYbrid Coordinate Ocean Model (HYCOM, an ocean general circulation model (OGCM)) for the study of ocean …
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Interactions of Vegetation and Climate: Remote Observations, Earth System Models, and the Amazon Forest
The natural composition of terrestrial ecosystems can be shaped by climate to take advantage of local environmental conditions. Ecosystem functioning, e.g. interaction between photosynthesis and temperature, can also acclimate to different climatological states. The combination of these two factors …
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Towards a paradigm shift in the modeling of soil organic carbon decomposition for earth system models
… role in the global carbon cycle and climate system. Earth System Models are used to project future interactions between terrestrial ecosystem carbon dynamics and climate. However, these models often predict a wide range of soil carbon responses and their formulations have lagged behind recent …
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Environmental changes and regime shift analysis in the southern Benguela using output from earth system models
… emissions has triggered profound changes in Earth's climate, affecting marine ecosystems and fisheries globally. This study focuses on the southern Benguela, an integral region of the southern African Eastern Boundary Upwelling System (EBUS), investigating the potential impacts of climate …
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Coupling data science and numerical simulations to empower atmospheric and environmental research
… Massive data from numerical simulations of the Earth system are now common in atmospheric and environmental research. However, state-of-the-art Earth System Models are subject to limitations because of the multiscale nature of the Earth system, where processes on scales smaller than the …
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Evaluating the interactions of crop management, carbon cycling, and climate using Earth system modeling and remote sensing
… Inclusion of crop management practices in Earth system models used for assessing global climate is a key requirement for evaluating the overall effects of different crop management practices on C cycling and their potential to mitigate climate change. Studies in this dissertation seek to …
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Improving satellite data interoperability: Large-scale data integration and agricultural applications in the US Midwest
Accurate ecosystem monitoring is more needed than ever. Satellite remote sensing (RS) offers unique insights into this field of research. Scalability is perhaps the most irreplaceable advantage of satellite RS for earth system models. However, accompanied with the surge of satellite data …
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Advancing Arctic coastal erosion measurement and monitoring through UAV-SfM, satellite imagery, and object-based image analysis
Arctic coasts are vast, representing 30-34% of Earth’s coastline and exhibit some of the highest rates of erosion in the World due to the presence of permafrost. Rates of erosion are expected to increase with warming air and water temperatures, reductions in Arctic sea ice extent and duration, sea …
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Inter-annual stability of land cover classification: explorations and improvements
Land cover information is a key input to many earth system models, and thus accurate and consistent land cover maps are critically important to global change science. However, existing global land cover products show unrealistically high levels of year-to-year change. This thesis explores methods …
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The tropical peatland carbon sink: climatic drivers and modelling of peat accumulation at the pan-tropical scale
Tropical peatlands are carbon-dense ecosystems and act as a globally important carbon sink. However, uncertainties exist about the climatic and environmental drivers of carbon accumulation and about the future of the carbon sink with climate change. There are also relatively few modelling studies …
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Internal and structural variability in global urban climate projections in CMIP6
… land parameterization in the state-of-the-art Earth system models (ESMs). This study assesses such variability structure through a novel multi-model urban emulator framework. I built a credible XGB-based urban climate emulator by utilizing the Community Earth System Model (CESM) simulation …
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The impact of increased grid resolution on the mixed layer depth variability in the South Atlantic Ocean and Southern Ocean
… Ocean plays a major role in global climate system. An understanding of Southern Ocean dynamics allows for a better understanding of the carbon cycle and possible future climate conditions. Earth System Models are used to study Southern Ocean dynamics and are currently producing reliable …
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A Continental-Scale Investigation of Factors Controlling the Vulnerability of Soil Organic Matter in Mineral Horizons to Decomposition
… are a source of major uncertainty in current Earth system models (ESMs), which reduces the effectiveness of these models in predicting the efficacy of climate change mitigation strategies. To improve our understanding of controls on SOM decomposition at scales relevant to such modeling …
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Tracking carbon fluxes across ocean interfaces using dissolved gas observations
The cycling and exchange of carbon between Earth’s systems play a pivotal role in regulating climate, yet two major carbon fluxes remain poorly constrained: the biological carbon pump (BCP) and carbon release from Arctic permafrost. This thesis focuses on dissolved gases as tracers and drivers of …
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Development and Stakeholder-informed Evaluation of Global Climate Temperature Response Functions
Modern climate models allow for accurate simulation over a range of future climate scenarios. However, there exists a significant gap in terms of speed, accuracy, and overall intuitiveness between the stateof-the-art and more generally accessible tools, especially in tools used for climate …
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Tracking carbon fluxes across ocean interfaces using dissolved gas observations
The cycling and exchange of carbon between Earth’s systems play a pivotal role in regulating climate, yet two major carbon fluxes remain poorly constrained: the biological carbon pump (BCP) and carbon release from Arctic permafrost. This thesis focuses on dissolved gases as tracers and drivers of …
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A fast and efficient solver for viscous-plastic sea ice dynamics
Sea ice plays a key role in the global climate system. Indeed, through the albedo effect it reflects significant solar radiation away from the oceans, while it also plays a key role in the momentum and heat transfer between the atmosphere and ocean by acting as an insulating layer between the two. …
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