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 46 for “"Teleconnections"”.
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Teleconnections between seasonal rainfall in coastal Tanzania and Enso
The modulation of 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 …
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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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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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Evaluating the impact of oceanic/atmospheric teleconnections on historical wildfires in West Virginia (1939--2006)
Oceanic/atmospheric oscillations affect climate in many ways. This study quantitatively examined climate teleconnection patterns and in turn analyzed the influence of climate on wildfire activity within West Virginia from 1939--2006. Identifying the linkages between oscillations and climate …
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The Hydroclimate Variability of Central Africa: seasonal cycle, mechanisms, teleconnections and impacts on neighbouring regions
Central Africa is, climatologically speaking, a poorly studied region (Clivar, 2000; Dezfuli and Nicholson, 2012; Nicholson and Dezfuli, 2012; Todd and Washington, 2004). It is considered as a knowledge gap in the understanding of the tropical climate system (Todd and Washington, 2004). Drivers of …
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Investigating the link between southern African droughts and global atmospheric teleconnections using regional climate models
… and investigates the roles of atmospheric teleconnections on the drought patterns. The results show that the drought patterns can occur in any season, but they have preference for seasons. Some droughts patterns may persist up to three seasons, while others are transient. Only about 20% of …
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High-Latitude Southern Hemisphere Climate Variability, Trends, and Tropical Forcing.
… are assessed in idealised AGCM simulations. Teleconnections from the Atlantic Ocean, driven by warmer SSTs, changes to the zonal Walker Circulation, an intensification of the Hadley Cell, and the subsequent initiation of atmospheric Rossby waves, are found to be key components forcing …
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Investigating the relationships between wheat-specific rainfall characteristics, large-scale modes of climate variability and wheat yields in the Swartland region, South Africa
… rainfall- wheat yield thresholds. Three teleconnections (El Niño-Southern Oscillation [ENSO], Antarctic Oscillation [AAO] and South Atlantic sea surface temperatures [SSTs]) represented by eight climate indices (Nino 3.4 Index, Ocean Nino Index [ONI], Southern Oscillation Index [SOI], AAO …
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Evaluating CFSv2 Subseasonal Forecast Skill with an Emphasis on Tropical Convection
… tropical convection patterns and associated teleconnections degrade with forecast lead time. Large-scale tropical convection in CFSv2 is more stationary than in reality. MJOs in the model propagate eastward too slowly and rarely traverse beyond the Maritime Continent. The wavenumber-frequency …
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Assessing the representation of teleconnective drivers of rainfall over Eastern Africa in global and regional climate models and projected future changes
… and a subject to significant control from teleconnections. An extended diagnosis of the capacity of climate models to represent remote controls of regional climate (teleconnections) is vital for assessing model-based predictions of climate variability, understanding uncertainty in climate …
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Lake sediments as climate and tectonic archives in the Indian summer monsoon domain
… forcing mechanisms (solar insolation, internal teleconnections for e.g., El Niño-Southern Oscillation, tropical-midlatitude interactions). My work aims to improve the understanding of monsoon variability through generation of long term high resolution palaeoclimate data from climatically …
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Hydroclimate Drivers and Atmospheric Dynamics of Floods
… climatic patterns, and mesoscale atmospheric teleconnections. Analyzing recent trends in the frequency and duration of global floods indicates that there is a significant upward trend in the statistics of their annual probability distribution, and large-scale climate teleconnections play a …
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The Impact of a Warmer Climate on Atmospheric Circulation with Implications for the Asian Summer Monsoon
… exactly the Indo-Pacific circulation and global teleconnections differed from modern day conditions. GCM generated teleconnections from the Indo-Pacific region were examined from origin to their impact on the extra-tropics under warm Pliocene conditions. The exact forcing source was not assumed …
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Wind in the Upper Midwest: Assessing Wind Resource Variability and Representation in Reanalyses
… ranging from months to years, with the so-called teleconnections possibly driving significant changes in power output. The goal of this study was to assess the potential impacts of modes of variability within the climate system on wind energy output in the Upper Midwest (UMW: 40-52°N, 87-105°W), a …
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The Seasonality and Climate Predictability of the Frequency of Extreme Flood Events Across the Contiguous United States
… to deduce the effects of large-scale climate teleconnections on the rate of extreme flood occurrences. Results show that overall, approximately 62% of the stations are influenced by a selected set of 7 climate teleconnections. NINO3.4 and NINO1.2 (indices for El-Nino Southern Oscillation) are …
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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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Evaluation of an eddy resolving HYCOM simulation in the South Atlantic Ocean
… Atlantic Ocean acts as a key region of ocean teleconnections and water mass transformation, directly transporting waters from the Southern, Pacific and Indian Oceans towards the North Atlantic and feeding the upper branch of the Atlantic Meridional Overturning Circulation. To date, this region …
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Analysis of Extreme Reversals in Seasonal and Annual Precipitation Anomalies Across the United States, 1895-2014
… the research was to examine large-scale climate teleconnections for historical relationships with the occurrence of precipitation reversals. The El Nino-Southern Oscillation was chosen for analysis due to its well-known relationships with precipitation patterns across the United States. Results …
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Impacts of Synoptic Weather on the Ice Phenology of Maine Lakes, 1955-2005
… ice-out to spring air temperature or global teleconnections/oscillations, the Spatial Synoptic Classification (SSC) method was used to encapsulate several meteorological variables that could have a bearing on ice-out variation. The balance between occurrence of relatively cool Moist Polar …
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