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 43 for “"Sea Surface Height"”.
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Modeling sea surface height in the Gulf of Mexico
A model was created to form synthetic plots of sea surface height (SSH) from monthly SSH statistics in the Gulf of Mexico generated from satellite laser altimetry data. SSH is a signal of the upper ocean mixed layer heat content and is an input for hurricane intensity models. A significant ocean …
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Investigating the relationship between volume transport and sea surface height in the Agulhas Current System
… Current Time-series array) and the gradient of sea surface height across the current was investigated using a regional Hybrid Coordinate Ocean Model. Previous studies have suggested a high correlation between SSH slope and Agulhas Current transport and, based on 3 years of in situ measurements, …
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Dynamics of the Antarctic circumpolar current : evidence for topographic effects from altimeter data and numerical model output
… Antarctic Circumpolar Current (ACC). The mean sea surface height across the ACC has been reconstructed from height variability measured by the Geosat altimeter, without assuming prior knowledge of the geoid. For this study, an automated technique has been developed to estimate mean sea surface …
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Collinear analysis of altimeter data in the Bering Sea
Eighteen months of sea surface height data from the GEOSAT altimeter along collinear subtracks were analyzed for information on the circulation pattern in the Bering Sea. Seventy subtracks from both ascending and descending orbits, with as many as 35 repeat cycles along each subtrack, were …
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The evolution of upper ocean thermal structure at 10°N, 125°W during 1997-1998
… based on the PACS data set, TOPEX/Poseidon sea surface height data, European Remote Sensing satellite wind data, and model simulations and experiments reveals that the dominant mechanisms affecting the thermocline depth and SST at the mooring site during the measurement period were local …
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The evolution of upper ocean thermal structure at 10⁰N, 125⁰W during 1997-1998
… based on the PACS data set, TOPEX/Poseidon sea surface height data, European Remote Sensing satellite wind data, and model simulations and experiments reveals that the dominant mechanisms affecting the thermocline depth and SST at the mooring site during the measurement period were local …
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Assimilation of altimeter data in a quasi-geostrophic model of the Gulf Stream system : a dynamical perspective
… The data that have been assimilated are maps of sea surface height which have been obtained as the superposition of sea surface height variability deduced from the Geosat altimeter measurements and a mean field constructed from historical hydrographic data. The method used for assimilating the …
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Evaluation of GEOSAT data and application to variability of the Northeast Pacific Ocean
… to create profiles of the difference between the sea surface height along a given satellite repeat, and the mean sea surface height along that repeat's groundtrack. Detrending of sea surface bias and tilt on each repeat reduced orbit and other long wavelength errors in the difference profiles. The …
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Combining altimetry and hydrography with inverse methods
… inverse method, which produces an estimate of Sea Surface Height (SSH) across the region of interest rather than simply at station positions. Real-time ‘float’ observations and satellite altimetry measurements are used to map a ‘sea surface elevation’ to study the large-scale ocean circulation …
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Low frequency variabilty of the Agulhas Current region in a numerical model
… 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 to be only marginally …
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Air-sea interaction at contrasting sites in the Eastern Tropical Pacific : mesoscale variability and atmospheric convection at 10°N
The role of ocean dynamics in driving air-sea interaction is examined at two contrasting sites on 125°W in the eastern tropical Pacific Ocean using data from the Pan American Climate Study (PACS) field program. Analysis based on the PACS data set and satellite observations of sea surface …
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The Gulf Stream: along-stream evolution of volume transport and water properties observed by underwater gliders
… a 1500-km-long gap in longer-term sustained subsurface measurements of the Gulf Stream. The gliders provide concurrent, high-resolution measurements of Gulf Stream hydrography and velocity over more than 15 degrees of latitude between Florida and New England. These observations are used to …
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The Gulf Stream: Along-stream evolution of volume transport and water properties observed by underwater gliders
… a 1500-km-long gap in longer-term sustained subsurface measurements of the Gulf Stream. The gliders provide concurrent, high-resolution measurements of Gulf Stream hydrography and velocity over more than 15 degrees of latitude between Florida and New England. These observations are used to …
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The inter-annual variability in the onset of the enhanced chlorophyll-a east of Madagascar
… and satellite datasets of chlorophyll-a, sea surface temperature, wind speed and direction and sea surface height were analysed. A bloom was characterized by twice the mean level of the sub-region (~0.08mg/m3) and three bloom years were identified: 2004, 2006 and 2008. The timing, …
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Investigating the atmospheric and oceanic drivers of Atlantic Multidecadal Variability and predictability
… the contributions of vertical entrainment and seasonality in local upper-ocean processes to sea surface temperature (SST) variability. Through this hierarchy, I highlight unrealistic features present in slab ocean models widely used to isolate atmospheric contributions to AMV. On the opposite …
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Investigating the Atmospheric and Oceanic Drivers of Atlantic Multidecadal Variability and Predictability
… the contributions of vertical entrainment and seasonality in local upper-ocean processes to sea surface temperature (SST) variability. Through this hierarchy, I highlight unrealistic features present in slab ocean models widely used to isolate atmospheric contributions to AMV. On the opposite …
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Optimization of Disaggregated Space Systems Using the Disaggregated Integral Systems Concept Optimization Technology Methodology
This research describes the development and application of the Disaggregated Integral Systems Concept Optimization Technology (DISCO-Tech) methodology. DISCO-Tech is a modular space system design tool that focuses on the optimization of disaggregated and non-traditional space systems. It uses a …
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Global barotropic variability of the ocean in response to atmospheric forcing based on multichannel regression and Kalman filter techniques
… to test the hypothesis that the global sea surface height variability can be adequately described by linear barotropic ocean models: the multichannel regression and the optimal smoothing techniques. We start with the simplest linear vorticity balance and continue by building a hierarchy …
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The Study of the Indian Ocean Response to Climatic Events Using Satellite Observations and Model Simulations
<p>The interactions of intraseasonal and interannual climate variability with surface ocean properties is an active area of research in the Indian Ocean region. Understanding how climate variations impact basin-wide salinity patterns is an important step in understanding how this variable impacts …
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Influence of the Indian Ocean Subtropical Dipole on the Agulhas current
… accurate spatial and temporal account of the Sea Surface Temperature (SST) and Sea Surface Height (SSH) variability in the Subtropical Indian Ocean (SIO). Simulation and evaluation of SIOD events was achieved through the application of the Empirical Orthogonal Function (EOF), Wavelet Analysis …
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