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 11 of 11 for “"Geostrophic currents"”.
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An investigation into the sampling bias of Argo profiling floats in the Southern Ocean
… on by the effects of bathymetric steering of currents, as well as oceanic features, such as meanders and eddies, that affect their distribution over the global ocean. This study investigates the sampling distribution of profiling floats and assesses the mechanisms that impact their …
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The identification and tracking of Agulhas rings using satellite altimetry
… analysing, interpreting and computing surf ace geostrophic currents from GEOSAT altimeter data are explained. These methods were implemented in an examination of GEOSAT altimeter data for the period 12 July 1988 to 13 May 1989 with application to the identification and tracking of Agulhas rings …
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Linking Prey to Predator: Scale Dependence and Oceanographic Influence in Marine Food Webs
… whale (Megaptera novaeangliae). The effect of geostrophic currents and environmental regimes on the deep scattering layers of the central tropical pacific were examined relative to sightings of marine mammals in the area. Analyses across trophic levels and at multiple scales is an important …
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Shelf currents, ice and wind : a numerical modeling study
… favorable winds and barotropic background currents on shelf fronts are examined using numerical models. The models are configured with the characteristics of the East Greenland Current, north of the Denmark Strait, in mind. While the models are heavily idealized, basic physical parameters …
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Annual cycle of the Benguela Jet
… the peaks of summer and winter. The surface geostrophic currents derived from both the model and satellite data reproduced the existence of the jet current off Cape Columbine and the Cape Peninsula. The jet was narrow and strong in January off Cape Columbine and off the Cape Peninsula and was …
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Rotating convection driven by differential bottom heating and its application
… transport in the experiment was mostly due to geostrophic flows with a minor correction caused by the bottom friction. If there was no friction, the scaling law from the experiment resembles the one verified in part in the numerical model by Bryan and Cox (1967). Flow visualization and …
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Towards Improved Estimates of Upper Ocean Energetics
… to the interaction between ocean surface currents and surface wind stress, a number of surface current decompositions can be used to decompose wind work calculations. In this research, geostrophic, ageostrophic, Ekman, and total current decompositions are all used to calculate wind work. …
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A study of Mesoscale Eddies, the Agulhas current and the evolution of its meanders using satellite observations and numerical modelling experiments
… drifter observations and altimetry-derived geostrophic currents, it is shown that source region eddies dissipate upon approaching the Agulhas Current. Their entrainment into the Agulhas Current affects its mean velocity and offshore position through a transfer of momentum, with anti-cyclonic …
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Surface and sub-surface hydrographic variability at the Prince Edward Islands: perspectives from the high resolution GLORYS model
… at the islands. A clear overestimation of the geostrophic currents (up to 0.2 m s -1 ) and underestimation of SSH (up to 0.6 m) by GLORYS was observed. The spatial and temporal variability of temperature and salinity was captured by GLORYS throughout the entire water column, despite the …
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An investigation of wind- and wave-driven dynamics in Antarctic sea ice from multiple types of buoy arrays
… response of sea ice, or allow the underlying geostrophic currents to keep and sustain the weaker oscillations during the period of storm quiescence. An investigation into wave-ice interactions revealed that storm-generated waves have enough energy to propagate > 200 km into the ice cover. In …