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 “"North Atlantic Oscillation"”.
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Geochemistry of slow-growing corals : reconstructing sea surface temperature, salinity and the North Atlantic Oscillation
… SSTs at Bermuda are correlated to phases of the North Atlantic Oscillation (NAO), a meridional oscillation in atmospheric mass. Much uncertainty remains about the relationship between the NAO and the ocean, and one critical outstanding question is whether anthropogenic changes are perturbing the …
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Geochemistry of slow-growing corals : reconstructing sea surface temperature, salinity and the North Atlantic Oscillation
A 225-year old coral from the south shore of Bermuda (64°W, 320N) provides a record of decadal-to-centennial scale climate variability. The coral was collected live, and sub-annual density bands seen in x-radiographs delineate cold and warm seasons allowing for precise dating. Coral skeletons …
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The Hydroclimatology of West Virginia Spatial and Temporal Trends and their Relationship with the North Atlantic Oscillation
… at global, regional, and local scales. The North Atlantic Oscillation (NAO) is another important factor contributing to climate variability by influencing the intensity of storms entering the eastern US. The Southeastern US is receiving less precipitation and streamflow is decreasing while …
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High-resolution climatic study of the Norwegian and Iberian shelves during the late Holocene : a diatom perspective
Surface-ocean changes in the North Atlantic are closely linked to modes of atmospheric variability, the most dominant of which is the North Atlantic Oscillation. The aims of this study were to investigate high-frequency climate variability in the North Atlantic through the use of high-resolution …
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Marine influence on juvenile fish trophic ecology and community dynamics in Maryland's northern coastal lagoons
… increased seagrass and tide level, and decreased North Atlantic Oscillation index. In Maryland's northern lagoon, the strength of marine influence on juvenile assemblages depended on the interplay between internal bay structure and external marine forcing.
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The Joint Influence of ENSO and NAO on US Landfalling Hurricanes and their Origination Points
… 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 is achieved) to see if atmospheric …
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Seasonal hydrological prediction in Great Britain – an assessment
… generating mechanisms is not captured by the North Atlantic Oscillation Index. Thirdly, seasonal climate model forecast skill is evaluated. Limited skill exists over land and over all extratropical regions for forecasts beyond month-1; precipitation has lower skill than 2-metre air temperature …
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Trend Reversal in Lake Michigan Contribution to Snowfall
… to recent polarity transitions of the Arctic Oscillation and North Atlantic Oscillation.
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Winter mixed-layer development in the central Irminger Sea : the effect of strong, intermittent wind events
… winters were mild and characterized by a low North Atlantic Oscillation (NAO) index. All of the storms that were advected through the region were tracked, and the tip jet events that occurred throughout the two winters were identified. Composite images of the tip jets elucidated the conditions …
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Analysis of Roanoke Region Weather Patterns Under Global Teleconnections
… 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 Roanoke, Virginia region. The first chapter describes the behavior …
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New insights into the summer distribution of basking sharks (Cetorhinus maximus) in the northeast Atlantic
… widespread historic exploitation in the northeast Atlantic and are of conservation concern. A greater knowledge on their spatial and temporal habitat use in response to environmental conditions is required to better inform subsequent monitoring and management strategies. Several efforts …
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The detection and prediction of climate change in Ireland using an automated classification of atmospheric circulation patterns
… flow, associated with a shift in the North Atlantic Oscillation Index.
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Quantifying sources of uncertainty in regional climate model scenarios for Ireland
… a key large-scale driver of Irish climate, the North Atlantic Oscillation, was examined for a representative subsample of models. Skill in simulating the NAO was found to vary considerably between models. Therefore, assessing statistics of mean climate may not be the optimum way to characterize …
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Collective risk modelling of multivariate compound events: correlation of aggregate wind and precipitation in European extratropical cyclones
… variability: negative correlation with the North Atlantic Oscillation over the UK, and positive correlation with the Scandinavian pattern over central Europe.<p></p>
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Dynamics of the atlantic salmon (Salmo salar L.) population of the River Foyle, Ireland
This study examines the dynamics of the Atlantic salmon (Salmo salar L.) population of the Foyle catchment in Ireland, through the analysis of long-term datasets and extensive field data. In chapter 1 the current conservation status of the salmon is discussed with particular reference to the Foyle. …
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How does plankton distribution and activity influence the variability of carbon dioxide uptake in the North Atlantic?
… of the carbon dioxide (CO2) sink in the North Atlantic at a range of spatial and temporal scales. Phytoplankton indices collected from the continuous plankton recorder (CPR) and the concentration of CO2 within the surface waters show that at seasonal time-scales phytoplankton play an …
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Cold air outbreaks over the Gulf Stream and implications for the North Atlantic Ocean
During Cold Air Outbreak (CAO) events over North America during winter, cold dry air is often advected over the ocean offshore of the East Coast. A motivating hypothesis of this study is that the air-sea fluxes associated with CAO events will be manifested in offshore ocean variations that will be …
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Changes in near-surface winds across Sweden over the past decades - Observations and simulations
… circulation changes, in particular to the North Atlantic Oscillation, and the intensity changes of extratropical cyclones passing across Sweden. The comparison with reanalysis outputs reveals that, in addition to the large-scale interannual variability, changes in surface roughness (e.g. …
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Winter mixed-layer development in the central Irminger Sea : the effect of strong, intermittent wind events
… winters were mild and characterized by a low North Atlantic Oscillation (NAO) index. All of the storms that were advected through the region were tracked, and the tip jet events that occurred throughout the two winters were identified. Composite images of the tip jets elucidated the conditions …
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