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 34 for “"Climate Dynamics"”.
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Reconstruction of environmental and climate dynamics using multi-proxy evidence from palaeosols of the Western Cape, South Africa
… highly sensitive to oscillations in the earth’s climate system triggered by major tectonic changes, local variations in orbital forcing, better known as Milankovitch cycles, and its position at the interface between temperate and tropical circulation systems. Regrettably, a dearth of reliable and …
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Palaeoenvironmental reconstruction of late Holocene climate dynamics in Southwest Africa using a multi-proxy characterization of Namaqualand mudbelt sediments
… for palaeoclimatic studies, as it reflects the dynamics of both tropical and temperate climate regimes. This study aims to create a catchment-integrated view of palaeoenvironmental conditions in the country's Winter Rainfall Zone (WRZ) and Southern Benguela region during the late Holocene, in …
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Late Holocene environmental and climate dynamics along the southern Cape coast of South Africa: high resolution multi-proxy records from the wilderness embayment
… sequences and associated proxy records. The climate along the southern Cape coast is influenced by both tropical and temperate climate systems, and the region hosts highly diverse vegetation including fynbos and thicket elements and includes the Knysna Afrotemperate Region – the most …
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Seasonality in a changing climate: Insights from the modern ocean with application to the Eocene Epoch
<p>Climate change is arguably the most important issue facing modern society. One of the best tools we have for constraining future climate conditions comes from looking at warm and transitional intervals in Earth’s geologic past, such as the Eocene Epoch (~56-34 Ma). The Eocene Epoch was a time of …
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Computational analysis of the biophysical controls on Southern Ocean phytoplankton ecosystem dynamics
… in regulating global biogeochemical cycling and climate dynamics. The structure of spatial-temporal variability in phytoplankton ecosystem dynamics is largely governed by physical processes but a variety of competing pathways complicate our understanding of how exactly they drive net population …
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Mechanisms of Interactions between Aerosol Physics and Atmospheric Dynamics
… of dust and smoke particles with large-scale climate dynamics. This study revealed that the variability Saharan dust radiative properties is significantly linked to high-frequency atmospheric wave activity across the tropical Atlantic storm tracks, while the variability of smoke particles from …
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Galerkin Approximations of General Delay Differential Equations with Multiple Discrete or Distributed Delays
… they have found applications in fields such as climate dynamics, biosciences, engineering, and control theory. In contrast to ordinary differential equations (ODEs), the phase space associated even with a scalar DDE is infinite-dimensional. Oftentimes, it is desirable to have low-dimensional ODE …
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Energy and Moisture Transport in the Earth Climate System: Mean State and the Perturbation Response
… transport define the mean state of the Earth Climate System and its response to perturbations. In the first study, we use a global climate model to study the effect of flattening the orography of the Antarctic Ice Sheet on climate. A general result is that the Antarctic continent and the …
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Long-term Changes in Synoptic-Scale Air Mass Persistence Across the United States
From a climate dynamics perspective, air mass persistence reflects variability in the dynamic nature of the atmosphere. In this study, a historical analysis of synoptic air mass persistence across the continental United States is presented to portray spatial and temporal variability and trends in …
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Feast Your Eyes: An Exploration of Our Consumption of Whales
In an era where the urgency of climate change is paramount, this research delves into the obscured history of whale consumption and its implications for the South Durban Basin communities. As the global community grapples with the escalating challenge of climate change, proactive measures to …
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Comparison of three dust sources in Iceland: Dyngjusandur, Mýrdalssandur and Sandkluftavatn
… various ecological impacts, such as influencing climate dynamics and marine ecosystem enrichment. The study utilizes data from the DustTrak DRX device to analyze particulate matter concentrations, PM1, PM2,5, PM4, and PM10, which can have adverse health. The available data reveals that …
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On the external forcing of Indian Ocean climate variability across timescales
It is imperative to understand the dynamics of external climate forcings and the nature of the climate system’s responses for improved predictability. These forcings include low-probability, high-impact events like explosive volcanic eruptions as well as the continued injection of anthropogenic …
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Computational analysis of the biophysical controls on Southern Ocean phytoplankton ecosystem dynamics
… in regulating global biogeochemical cycling and climate dynamics. The structure of spatial-temporal variability in phytoplankton ecosystem dynamics is largely governed by physical processes but a variety of competing pathways complicate our understanding of how exactly they drive net population …
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Continental-scale isotope hydrology
… the seasonality of groundwater recharge, (3) the climate of the last ice age, and (4) the chemistry of Ugandan waters. (1) Chapter one presents a new global compilation of lake water isotopic data, river isotopic data, stand-level transpiration rates, and water use efficiency measurements, and …
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The Evolution of the El Niño-Southern Oscillation and Tropical Pacific Climate Across the Last Deglaciation
… is the largest interannual component of Earth’s climate system, capable of exerting significant influence over global climate patterns that affect communities around the globe. Nevertheless, a comprehensive understanding of the ENSO system and its relationship to tropical Pacific climate dynamics …
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A geospatial analysis of Arctic marine traffic
Recent changes in Arctic Ocean climate dynamics and marine activity in the region require re-evaluation of physical operating conditions, ship traffic patterns, and policy requirements. This study used (1) government surveys, (2) vessel reports, and (3) Automatic Identification System (AIS) …
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Climate impact metrics for energy technology evaluation
The climate change mitigation potential of energy technologies depends on how their lifecycle greenhouse gas emissions compare to global climate stabilization goals. Current methods for comparing technologies, which assess impacts over an arbitrary, fixed time horizon, do not acknowledge the …
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Tracking carbon fluxes across ocean interfaces using dissolved gas observations
… 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 these processes through both autonomous and …
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Tracking carbon fluxes across ocean interfaces using dissolved gas observations
… 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 these processes through both autonomous and …
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Dependence of continental severe convective instability on climatological environmental conditions
… is a relative paucity of research exploring the climate dynamics of continental deep convection. This work makes a contribution to rectifying that deficiency by exploring the physical mechanisms by which convective available potential energy (CAPE) is generated, and their dependence on …
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