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 50 for “"Satellite Altimetry"”.
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Ocean Tides Modeling using Satellite Altimetry
… particularly over coastal regions. Advances in satellite radar altimetry technology enabled a globally sampled record of sea surface height (SSH) and its changes over the past two decades, particularly after the launch of TOPEX/POSEIDON satellite. This geophysical record enables numerous …
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GLOBAL TRENDS IN EDDY KINETIC ENERGY FROM SATELLITE ALTIMETRY
The temporal changes in the oceanic eddy kinetic energy (EKE) including trends and variability are presented and the dynamical mechanisms are investigated. The domain is near-global with a focus on the North Atlantic, North Pacific and Southern Oceans. Altimeter-derived geostrophic surface …
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The identification and tracking of Agulhas rings using satellite altimetry
The methods of 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 …
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Precise orbit determination and analysis from satellite altimetry and laser ranging
For optimum utilization of satellite-borne instrumentation, it is necessary to know precisely the orbital position of the spacecraft. The aim of this thesis is therefore two-fold - firstly to derive precise orbits with particular emphasis placed on the altimetric satellite SEASAT and secondly, to …
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Coastal surface circulation of the Gulf of Cadiz from satellite altimetry measurements
… of coastal zone dynamics using high-resolution altimetry data. The study evaluates the possibility of studying mesoscale surface circulation in coastal areas, particularly in the Gulf of Cadiz, Spain, using high-resolution altimetry data with a posting rate of 20 Hz from CryoSat-2 (CS2). For …
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Land Ice Monitoring via GRACE and Satellite Altimetry in the Canadian Arctic Archipelago
… estimates from GRACE gravity and ICESat laser altimetry data for both the Northern and the Southern Canadian Arctic (NCA; SCA), compare both estimates and assess them with respect to previous studies, while discussing the reasons of the potential discrepancies existing. GRACE data are available …
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Height change detection in Antarcita using satellite altimetry data and Kriging / Kalman filtering techniques
… The most common technique used in analyzing satellite altimetry data to study height change in the ice sheets is the dH/dt technique based on the cross-over geometry. In this thesis two alternative techniques to cross-overs are studied and applied to all ERS radar and ICESat laser altimetry …
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Mesoscale variability and mean flow interaction near the Gulf Stream as seen by satellite altimetry and numerical modelling
… flow near the Gulf Stream is studied here using satellite altimeter measurements and an eddy resolving numerical modeL. The eddy vorticity flux in the quasigeostrophic framework is obtained from the stream function standard deviation and spatial correlation function assuming the correlation …
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Mesoscale variability and mean flow interaction near the Gulf Stream as seen by satellite altimetry and numerical modelling
… flow near the Gulf Stream is studied here using satellite altimeter measurements and an eddy resolving numerical model. The eddy vorticity flux in the quasigeostrophic framework is obtained from the stream function standard deviation and spatial correlation function assuming the correlation …
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Analysis of water volume change of the lakes and reservoirs in the Mississippi River basin using Landsat imagery and satellite altimetry
… provide high accuracy observations. Although the altimetry technique can generate the time series of the water level for the majority of lakes, they are not global coverage due to the distance between satellite tracks and the gap between different missions. Therefore, in situ data and satellite …
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Combining altimetry and hydrography with inverse methods
… positions. Real-time ‘float’ observations and satellite altimetry measurements are used to map a ‘sea surface elevation’ to study the large-scale ocean circulation in the North Atlantic. The inverse has been applied to simulated Argo floats and satellite altimetry tracks in the Ocean …
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Vandens lygio vertinimas upėse naudojant palydovinius Copernicus duomenis /
… and logistically challenging areas. The use of satellite data allows monitoring of a large number of rivers and over large areas. The aim of this work is to assess the potential of Copernicus Land Monitoring Service data to determine the water levels in Lithuanian rivers. This work analyzes …
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Space and time scales of low frequency variability in the ocean
… η, φ, λ) can be derived from observations: (i) satellite altimetry measurements yield the surface eddy kinetic energy wavenumber and frequency spectra and the geographic distribution of surface eddy kinetic energy magnitude, (ii) XBT measurements yield the temperature wavenumber spectra, (iii) …
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The impact of assimilating along-track SLA data on simulated Eddy characteristics in the Agulhas system
… 'Free') and one with along-track SLA data from satellite altimetry assimilated (hereafter 'Assim.') via an Ensemble Optimal Interpolation (EnOI) data assimilation scheme. The results of these two configurations are compared with each other, and against a set of corresponding observational data …
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Detection and analysis of oceanic motion using pressure inverted echo sounders (PIES)
… The correlation of the SSH anomaly with satellite altimetry results higher correlations for the gridded AVISO product compared to the along track openADB product. Calculating the baroclinic ACC transports results a mean of 147±2.4 Sv for 2007-2008 and 142±1.9 Sv respectively for …
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Upper-ocean influences on hurricane intensification modeling
… for the model to be tested through the use of satellite altimetry. Measurements of the mixed layer depth and upper-ocean heat content are incorporated into the model for Hurricanes Bret, Gert, Opal, Mitch and Dolly. This technique is shown to be quite reliable for many storms, especially in the …
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Production and analysis of a Southern Ocean state estimate
… CTD synoptic sections, hydrographic climatology, satellite altimetry, and XBTs. Costs attributed to control variable perturbations ensure a physically realistic solution. An optimized solution is determined by the weights placed on the cost function terms. The state estimation procedure, along …
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Production and analysis of a Southern Ocean state estimate
… CTD synoptic sections, hydrographic climatology, satellite altimetry, and XBTs. Costs attributed to control variable perturbations ensure a physically realistic solution. An optimized solution is determined by the weights placed on the cost function terms. The state estimation procedure, along …
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Sea level variability in the Tropical Atlantic since 1993 and projections to 2100
… Employing an integrated approach combining satellite altimetry, tide gauges, GRACE/GRACE-FO gravimetric data, hydrographic profiles, and CMIP6 multi-model ensemble simulations, with time-series analysis and wave propagation studies, the research quantifies sea level trends, steric and mass …
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The general hydrography of the Mozambique Channel
… structure of the Mozambique Current. The use of satellite altimetry and numerical modeling revealed high mososcale activity in the Mozambique Channel. Thus guided by real-time altimetric data, the cruise sections intersected the main regions of high mesoscale activity in the centre of the …
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