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 45 for “"Ocean temperature"”.
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The influence of geothermal sources on deep ocean temperature, salinity, and flow fields
… of geothermal sources on the deep circulation, temperature and salinity fields. In Chapter 1 background material is given on the strength and distribution of geothermal heating. In Chapter 2 evidence for the influence of a hydrothermal system in the rift valley of the Mid-Atlantic Ridge on …
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The influence of geothermal sources on deep ocean temperature, salinity, and flow fields
… of geothermal sources on the deep circulation, temperature and salinity fields. In Chapter 1 background material is given on the strength and distribution of geothermal heating. In Chapter 2 evidence for the influence of a hydrothermal system in the rift valley of the Mid-Atlantic Ridge on …
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Reconstructing 3D ocean temperature fields from real-time satellite and buoy surface measurements
… from sensors. Specifically, we are interested in ocean temperature which can serve as a useful indicator for ocean acidification, and we are motivated by a data set of sensor measurements only available at the surface of the ocean. We first apply standard principal component analysis (PCA) at …
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Modeling studies of acoustic propagation through the Agulhas Current region
… warming problem. It is common knowledge that the ocean is an important heat sink and that to predict global warming trends it is important to measure changes in the ocean temperature. Measurements of ocean temperature are subject to large local variability associated with mesoscale features. In …
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Prediction of the spring transition and related sea-surface temperature anomalies
… and Garwood (1978) for generation of upper ocean temperature anomalies during the spring transition period was tested. If the transition between the winter and summer regimes occurred earlier (later) than normal, the seasonal heating was expected to have been accumulated in a shallow (deep) …
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Modeled sensitivity of the northwestern Pacific upper-ocean responses to tropical cyclones in a fully coupled climate model with varying ocean grid resolution
… fully-coupled models. Here we analyze the upper-ocean response to TCs using a high resolution Earth system model, in which a 0.5° atmosphere is coupled to an ocean with two different horizontal resolutions: 1° and 0.1°. The model produces realistic TCs up to category 3 in both versions of the …
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On the external forcing of Indian Ocean climate variability across timescales
… explores how external forcings affect Indian Ocean climate in the past, present, and future using paleoclimate archives in conjunction with observational and climate model data. Chapter 2 presents a novel geochemical stalagmite record from northern Madagascar which spans the end of the last …
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On the external forcing of Indian Ocean climate variability across timescales
… explores how external forcings affect Indian Ocean climate in the past, present, and future using paleoclimate archives in conjunction with observational and climate model data. Chapter 2 presents a novel geochemical stalagmite record from northern Madagascar which spans the end of the last …
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An evaluation of sea ice deformation and its spatial characteristics from the regional arctic system model
… a fully coupled land, atmosphere, sea ice, and ocean model with high spatial and temporal resolution. Time series analysis of the upper ocean temperature structure, basal melt rate, total deformation rate, and ice-ocean stress curl yield the identification of individual events. Shear deformation …
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Chemical Weathering History of Antarctica During A Late Eocene Glacial Event
<p>Several proxies for ocean temperature, ice sheet growth, and continental weathering analyzed from ODP Site 738 sediments off the coast of East Antarctica have offered insight into the variable climate of the Paleogene 'greenhouse.' In this study, I compile evidence from fine fraction carbonate, …
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Agulhas retroflection rings in the South Atlantic Ocean
… from the South Indian into the South Atlantic Ocean. Few hydrographic measurements have been collected from Agulhas rings in the South Atlantic Ocean and their characteristics and influence on the waters of the Cape Basin through which they pass are thus little known. The temperature, salinity, …
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Temperature and salinity variability in thermohaline staircase layers
… provides the first continuous time series of temperature, salinity and velocity profiles in a thermohaline staircase. Variations in the intensity of layering and the evolution of layer properties are well documented during the 4.3 month record. Such staircases are the result of strong salt …
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Climate and Hydrographic Variability In the Indo-Pacific Warm Pool Over the Past 26,000 Years
… is currently the warmest region of the modern ocean, with annual average sea surface temperatures upwards of 28°C. As such, it is the largest single source of heat and moisture to the atmosphere. Climate modeling efforts and paleoceanographic reconstructions have shown that the hydrology of …
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Planktonic foraminifera in the sea of Okhotsk : population and stable isotopic analysis from a sediment trap
… and stable isotopes to synoptic sea surface temperatures (SST's) was examined in the Sea of Okhotsk, using sediment trap samples (trap deployed Aug. '90 - Aug. '91; 53°19'N, 149°50'E) and AVHRR satellite sea surface temperature data. Synoptic SST's for the deployment ranged between -1.2 and …
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The Southern Ocean meridional overturning circulation as diagnosed from an eddy permitting state estimate
… modern general circulation model of the Southern Ocean with one-sixth of a degree resolution is optimized to the observed ocean in a weighted least squares sense. Convergence to the state estimate solution is carried out by systematically adjusting the control variables (atmospheric state and …
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Mass, heat, oxygen and nutrient fluxes at 30°S and their implications for the Pacific-Indian through flow and the global heat budget
… sections, two in each of the three major ocean basins, are employed in a set of inverse calculations to determine the extent of exchange between the Pacific and Indian Oceans through the Indonesian Archipelago and the net global oceanic heat flux at 30°S. Using a model which combines the …
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Heat flow and tectonics of the Ligurian Sea basin and margins
… sedimentation histories and glacial paleotemperatures. Using boundary-layer cooling models, equilibrium heat flow estimates support geologic evidence for Oligocene and early Miocene rifting. Heat flow maxima correlate well with two "oceanic" sub-basins, suggesting that the southeastern …
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Spatial and Seasonal Variations in Aridification Across Southwest North America
… (E) rates change with increasing global temperatures. Trends in the regional surface moisture balance (P−E) of SWNA vary between the arid southern subregion (mostly Northern Mexico) and the more temperate northern subregion (Southwest US), depending on the relative contributions of cold …
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The Evolutionary History and Phylogeny of the Lithodinae (Decapoda: Anomura: Lithodidae)
… the<br/>modern syntheses of plate tectonics, oceanography, species theory and cladistic<br/>systematics. The focus of this thesis was to investigate the origin and radiations of the<br/>deep-sea Lithodinae as a case study for interchanges between deep and shallow oceans<br/>in mobile benthic …
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The petrology of clay-rich beds in the Turonian (Upper Cretaceous) of the Anglo-Paris Basin
… is accompanied by a small (2 -4[degree]C drop in ocean temperature. Analysis of a series of samples from widely spaced localities within the Basin shows that individual marls can be geochemically fingerprinted, and confirms the established lithostatigraphic correlations. Using this method, samples …
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