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 116 for “"El Niño-Southern Oscillation"”.
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Tropical atmosphere-ocean interaction and the El Niño/Southern Oscillation Phenomenon
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1985.
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The El Niño - Southern Oscillation, rainfall and wheat yields in South Africa
This thesis assesses the relationships between the El Niño-Southern Oscillation (ENSO), rainfall and South African commercial winter wheat yields from 1974 - 2000. The analysis is through a combination of the Pearson's product moment correlation coefficient and an assessment of the magnitude and …
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El Niño Southern Oscillation teleconnections and their effects on the Amundsen Sea region
El Niño Southern Oscillation events have global implications both climatologically and socio-economically. One such climatological teleconnection is manifested in the Amundsen Sea region (ASR). The Amundsen sea low (ASL) is the dominant low pressure system located around the ASR and is important to …
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The Evolution of the El Niño-Southern Oscillation and Tropical Pacific Climate Across the Last Deglaciation
<p>The El Niño – Southern Oscillation (ENSO) 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 …
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An evaluation of historical fire occurrence, drought, and the El Niño southern oscillation in the greater Cross Timbers region, U.S.A
A concern over wildfire occurrence, and its relationship to drought and a changing climate has brought increased focus to the interface between the public and fire. Multiple factors, including an increase in fuel loading from decades of continuous fire suppression, changes in land use and …
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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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An analysis of variability in the South Atlantic
… for both large and regional scales, two ocean models are applied. An ocean general circulation model, forced with the National Centre for Environmental Prediction / National Centre for Atmospheric Research reanalysis is used to investigate the South Atlantic leading modes and also investigate the …
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Environmental change recorded in physical and geochemical proxies over the Last Glacial Cycle from two Northland, New Zealand dune lakes: Lake Kanono and Lake Kai Iwi
Lake sediment archives from Southern Hemisphere mid-latitude regions with maritime climates provide invaluable records of late Quaternary environmental change that are essential for the evaluation of inter-annual, decadal, centennial, and millennial-scale trends driven by shifting positions of the …
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An analysis of northern hemisphere block sizes compared to climatology and seasonal variations
… previous research. Block sizes were compared to El Niño-Southern Oscillation, blocking intensity as defined by Wiedenmann et al. 2002, and other seasonal characteristics. Results will assist researchers and long-range forecasters to predict the scale and potential impacts of blocking events, of …
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Simulating the characteristics of tropical cyclones over the South West Indian Ocean using an adaptive Stretched-Grid Global Climate Model
… Ocean (SWIO) have used Global Circulation Models (GCMs) with uniform grid. This study examines the capability of a GCM with adaptive grid stretching (CAM-EULAG, hereafter CEU) in simulating the characteristics of TCs over the SWIO. In the study, the CEU model is applied with a fine horizontal …
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The Joint Influence of ENSO and NAO on US Landfalling Hurricanes and their Origination Points
… were utilized in order to characterize the relationship between the El Niño Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO). Global atmospheric anomalies were then examined in addition to hurricane landfall and origination locations (i.e., the position hurricane strength …
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The influence of the Indian and Atlantic Oceans on wet and dry spells over southern Tanzania
… floods and droughts. The Tanzanian population relies heavily on seasonal rainfall. Over the northern part of the country, the rainy season occurs in two phases, the short rains (October-December) and the long rains (March - May). Over the southern and the western areas, the rainy season occurs …
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THE APPLICATION OF THE MARSUPIAL AND ROTATING CONVECTION PARADIGMS TO UNDERSTANDING THE TROPICAL CYCLOGENESIS AND INTENSIFICATION OF HURRICANE MICHAEL (2018)
… genesis and intensification of Hurricane Michael (2018), which formed in the Northwestern Caribbean Sea on October 7, 2018. Using the Marsupial and Rotating Convection Paradigms, the study identifies the dynamic and thermodynamic processes influencing the development of the protective “pouch” …
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Teleconnective Influences on the Strength of Post-tropical Cyclones
… of Hurricane Ike (2008) and examining how teleconnections such as the El Niño Southern Oscillation (ENSO), the Madden-Julian Oscillation (MJO), the Atlantic Multidecadal Oscillation (AMO) and the Pacific Decadal Oscillation (PDO) contribute to the strength of a transitioning post-tropical …
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Analyzing the effects of unforced natural variability and anthropogenic forcing on ENSO variability using CESM
The El Niño-Southern Oscillation (ENSO) is an important contributor to Earth’s inter-annual climate variability, with worldwide weather effects (Whetton and Rutherfurd, 1994; Hoerling and Zhong, 1997; Dai and Wigley, 2000). Understanding how ENSO may change with climate is a major challenge, given …
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Low frequency variabilty of the Agulhas Current region in a numerical model
… of the Agulhas region was analysed in relation to temperature, sea surface height (SSH) and velocity within the current using output from a regional ocean model. Validation of the model with in situ and satellite observed values for the temperature and SSH showed the modelled SSH results …
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Tropical cyclones within the sedimentary record : analyzing overwash deposition from event to millennial timescales
… Japan. A simple sediment transport model can reproduce the landward fining deposits observed at Vieques, and reveals that although the record exhibits centennial-tomillennial changes in hurricane overwash frequency, the magnitude of these flooding events has remained relatively …
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Long Term Ground Based Precipitation Data Analysis: Spatial and Temporal Variability
… response variables (classifiers) on various models applied to the detection of El Niño Southern Oscillation (ENSO) on California’s seven climate divisions by using modeled and gauge (in-situ/ground) precipitation measurements and various climate indices. Three scientific studies were conducted …
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Analysis of biomarker candidates from plant lipid inputs into Galapagos lacustrine sediments
… warming on the magnitude and frequency of the El Niño/Southern Oscillation (ENSO) phenomenon. Plant lipids identified in the sediment record of lakes in regions of high ENSO activity can act as biomarkers to reconstruct past precipitation patterns by measuring the D/H ratios preserved in these …
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Simulating the Characteristics and Influences of the Botswana High over Southern Africa using the Model for Prediction Across Scales (MPAS)
… system that modulates rainfall over subtropical Southern Africa, but the capability of a Global Climate Model (GCM) to reproduce the characteristics and influences of this system on drought remains unknown. Furthermore, the summer variability of the Botswana High has been linked to the El Niño …
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