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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 51 to 60 of 415 (0.072 seconds)| 51 |
PALEOPHOSPHATE DETERMINATIONS AND PALEOHYDROGRAPHIC RECONSTRUCTIONS USING A STATISTICALLY-DERIVED ISOTOPIC MODEL (OCEAN, ATLANTIC, PACIFIC, INDIAN)Unknown Date (has links)
Using Geosecs Atlantic, Pacific, and Indian Ocean hydrographic data, a set of ocean-specific models have been constructed to estimate the concentrations of inorganic, PO(,4)('-3) ((mu)gram-atoms/kg) in the upper water column, based upon the concentration of dissolved O(,2) (ml/l), and temperature ((DEGREES)C), assuming that the Redfield {O:P} ratio maintains. Substitution of foraminiferally-derived values of (delta)('13)C and (delta)('18)O into these ocean-specific models, as functions of dissolved O(,2) and temperature, yields a set of paleophosphate models which can be used down-core. / Calculated PO(,4)('-3) profiles for the upper water column, using observed temperature and (delta)('13)C(,(SIGMA)CO(,2)) data in the paleophosphate expressions, faithfully replicates the observed PO(,4)('-3) profiles at selected sites in all major ocean basins, between 50(DEGREES) north and 50(DEGREES) south latitude. Average PO(,4)('-3) concentrations approximated from the (delta)('13)C and (delta)('18)O of recent planktic foraminifera in the Indian Ocean, were similar to observed PO(,4)('-3) concentrations at those levels in the water column at which the organisms presumably secreted their tests. / Down-core data covering the last 18,000 years in the northern Indian Ocean suggests that at 9,000 kyBP, the upper water column in the northern Indian Ocean was more productive than at present or at 18 kyBP due presumably to a rapid overturn of old water closely following the last glacial readvance and the onset of a major warming trend. / Source: Dissertation Abstracts International, Volume: 43-12, Section: B, page: 3901. / Thesis (Ph.D.)--The Florida State University, 1982.
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URANIUM AND THORIUM ISOTOPE GEOCHEMISTRY IN FERROMANGANESE CONCRETIONS FROM THE SOUTHERN OCEANUnknown Date (has links)
Source: Dissertation Abstracts International, Volume: 32-09, Section: B, page: 5355. / Thesis (Ph.D.)--The Florida State University, 1971.
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THE SOUTHERN OCEAN 700,000 YEARS AGOUnknown Date (has links)
Source: Dissertation Abstracts International, Volume: 30-04, Section: B, page: 1816. / Thesis (Ph.D.)--The Florida State University, 1968.
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MICROBIAL SEEDING TO ACCELERATE HYDROCARBON DEGRADATIONUnknown Date (has links)
Source: Dissertation Abstracts International, Volume: 32-09, Section: B, page: 5354. / Thesis (Ph.D.)--The Florida State University, 1971.
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Dynamics of the Northwestern Atlantic Ocean : a diagnostic studyReynaud, Thierry H. January 1994 (has links)
No description available.
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The formulation of a thermocline model and application[s] to ocean-climate studiesZhang, Sheng, 1956- January 1993 (has links)
No description available.
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Numerical simulation of the Arctic Sea ice and ocean circulationHolland, David M. January 1993 (has links)
No description available.
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Geostrophic energetics and the small viscosity behaviour of an idealized ocean circulation modelScott, Robert Bruce, 1965- January 1998 (has links)
No description available.
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A semi-Lagrangian finite element barotropic ocean model /Le Roux, Daniel Y. January 1997 (has links)
No description available.
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Intraseasonal and interannual variability of sea ice in the Gulf of St.LawrenceLi, Yongxiang, 1962- January 2000 (has links)
No description available.
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