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 33 for “"El Nino - Southern Oscillation"”.
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Analyzing el nino southern oscillation predictions from long-short-merm-memory models
El Nino Southern Oscillation (ENSO) can have global impacts across the world. Because of its prevalence, scientists run models to forecast its next move. Here, long-short-term-memory models (LSTM) were compared to linear regression models (LR) as first steps to explore the potential benefits of …
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Examining the Connection between Guam's Seasonal Rainfall and the El-Nino Southern Oscillation 1950-2023
… interannual variability is represented by the El Nino Southern Oscillation (ENSO). Different phases of ENSO may produce deviations from the expected precipitation pattern. Knowledge of this deviation, may assist planners in compensating for changes in water supply. This study will analyze …
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Analysis of Roanoke Region Weather Patterns Under Global Teleconnections
This work attempts to relate global teleconnections, through physical phenomena such as the El Nino-Southern Oscillation (ENSO), Artic Oscillation (AO), North Atlantic Oscillation (NAO), and the Pacific North American (PNA) pattern to synoptic-scale weather patterns and precipitation in the …
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Teleconnections between seasonal rainfall in coastal Tanzania and Enso
… Tanzanian coastal rainfall variability with the El Nino/Southern oscillation (ENSO), the largest known mode of Southern Hemisphere climatic variation is examined. A rainfall index was formulated from variable Tanzanian coastal stations and used to identify the rainfall characteristics of each …
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Interactions of the Terrestrial Biosphere With Climate and Atmospheric Chemistry
… the period 1971--1990 is assessed using IBIS. Model results indicate that the combined fluctuations in climate and atmospheric CO2 during 1971 to 1990 caused significant interannual and seasonal variability in global biogenic isoprenoid fluxes partly related to the El Nino Southern Oscillation, …
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Analysis of Extreme Reversals in Seasonal and Annual Precipitation Anomalies Across the United States, 1895-2014
… States, the effects of natural hazards may well increase, as extreme events would increasingly affect concentrated populations and the infrastructure upon which they rely. Extreme precipitation is one natural hazard that could stress concentrated populations, and climate change research is …
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An investigation into the causes for the reduction in the variability of the El Niño-Southern Oscillation in the early Holocene in a global climate model
… for this using output from a Global Climate Model forced by present day and early Holocene boundary conditions, and a simplified model that is known to simulate the El Nino-Southern Oscillation (ENSO).We devise a scheme to incorporate mean state data, into the background states of a …
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The influence of volcanic stratospheric aerosols on interannual global climate variations
… has been proposed to explain the forcing of the El Nino/Southern Oscillation (ENSO) by low-latitude volcanic stratospheric aerosols (Handler 1989). This mechanism is based on the normal global annual cycle resulting from the normal annual cycle in the distribution of incoming solar radiation. The …
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Variability and long-term trends of climate extremes over the Limpopo, South Africa
Climate change has a crucial impact on livelihoods, economy, and water resources due to the occurrence of weather and climate extreme events such as floods, droughts and heat waves. Extreme weather has been increasing worldwide, hence the need to understand their nature and trends. The aim of this …
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ENSO forced variations of the sea surface temperature and adjusted sea level along the west coast of the United States
… coastal surface temperature and adjusted sea level data for the period 1955-1988 were used to characterize the surface temperature and adjusted sea level anomalies, and the propagation of features along the west coast of the United States during El Nino-Southern Oscillation (ENSO). The strong …
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Influence of the Indian Ocean Subtropical Dipole on the Agulhas current
… linked Subtropical Dipole (SIOD) events to southern Africa’s austral summer precipitation patterns, however, none have investigated the SIOD’s influence on the Greater Agulhas Current System. Here, the SIOD climatology was developed using a Regional Ocean Modeling System (ROMS) configured …
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Statistical modelling and variability of the subtropical front, New Zealand
… is the circumglobal frontal system of the Southern Ocean where intermediate water masses are formed, heat, salt, nutrients and momentum are redistributed and carbon dioxide is absorbed. The northern limit of this frontal band is marked by the Subtropical Front, where subtropical gyre water …
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Vegetation Variability and Its Hydro-Climatologic Dependence
… type, and climate variations (e.g., the El Nino Southern Oscillation [ENSO]), and to synthesize this understanding for future predictive modelling applications. The initial phase of this study examines how topographic variability moderates the climatologic influence on the vegetation at …
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The role of the large-scale modes of climate variability in the Southern African wave climate
The wave energy flux along the southern African coastline regularly reaches extreme levels, seriously impacting coastal communities, infrastructure, as well as near-coast and offshore marine operations. Understanding the drivers behind past high wave energy events and their frequency is key to …
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Spatio-Temporal Dynamics Of Phytoplankton Biomass From Ocean Color Remote Sensing And Cmip5 Model Suites
… decomposition of organic matter which effectively sequesters carbon away from the atmosphere. Our knowledge of phytoplankton activity is currently advancing fast through developments of multiple ocean-color remote sensing algorithms and via developments in ecological modules incorporated in …
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Understanding the Effect of Internal Climate Variability on 20th Century Indian Ocean Sea Level: Results from Newly Reconstructed Sea Level Data
<p>Densely populated low-lying coastal zones of countries that border the Indian Ocean are at risk due to sea level rise. However, sea level change in the Indian Ocean is poorly understood primarily due to short and sparse tide gauge observations. Although satellite altimetry provides accurate …
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DIRECT AND INDIRECT MODIFICATION OF STREAM FLOW IN THE FLATHEAD RIVER BASIN IN NORTHWESTERN MONTANA: HYDROLOGIC PARAMETER DEVELOPMENT AND IMPLEMENTATION
… The snowpack stores winter precipitation and releases it in the spring. This snowmelt-dominated streamflow is used by agriculture, municipalities and water-reliant ecosystems. Chapter 1 considered the response of unmodified snowmelt-dominated streamflow to climate change in the Flathead River …
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DIRECT AND INDIRECT MODIFICATION OF STREAM FLOW IN THE FLATHEAD RIVER BASIN IN NORTHWESTERN MONTANA: HYDROLOGIC PARAMETER DEVELOPMENT AND IMPLEMENTATION
… The snowpack stores winter precipitation and releases it in the spring. This snowmelt-dominated streamflow is used by agriculture, municipalities and water-reliant ecosystems. Chapter 1 considered the response of unmodified snowmelt-dominated streamflow to climate change in the Flathead River …
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On a New Framework for Detecting, Classifying, and Forecasting Floods for Large-scale Flood Risk Analysis
… of extreme floods, the ability to effectively model floods is crucial for risk management and mitigation of the impacts of these extreme flooding events. This dissertation presents a new framework for detecting and predicting large-scale flood risk in the United States using climate …
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Last-saturation applications to the humidity of the subtropical middle troposphere
I completed atmospheric transport modeling studies into distributions of subtropical water vapor, to identify the mechanisms by which humidity varies over distinct temporal scales: inter-annual time-scales associated with the El Nino – Southern Oscillation, over the next century in response to …
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