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 590 for “"North Atlantic"”.
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Plutonium isotopes in the North Atlantic
… sediment trap material and sea water from the North Atlantic. With the m.s. technique, not only is the detection limit for 239,240Pu increased by over an order-of-magnitude, but the 240Pu and 239Pu isotopes can be separated as well. The increased sensitivity for Pu provided by m.s. allowed me …
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Plutonium isotopes in the North Atlantic
Thesis (Ph. D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1986.
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Dynamics of North Atlantic western boundary currents
… shape the distribution of heat and carbon in the North Atlantic, with consequences for global climate. This thesis employs a combination of theory, observations and models to probe the dynamics of these two western boundary currents. First, to diagnose the dynamical balance of the Gulf Stream, a …
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Human activities in the deep North Atlantic
… of the extent of human activities in the deep North East Atlantic, OSPAR Maritime Area, revealed that during 2005 bottom-trawl fisheries affected an area of seafloor at least one order of magnitude greater than all the other the activities in the study combined. It was also found that …
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Meridional circulation in the tropical North Atlantic
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.
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Dynamics of North Atlantic western boundary currents
… shape the distribution of heat and carbon in the North Atlantic, with consequences for global climate. This thesis employs a combination of theory, observations and models to probe the dynamics of these two western boundary currents. First, to diagnose the dynamical balance of the Gulf Stream, a …
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Constraining North Atlantic circulation with transient tracer observations
… to constrain the ocean circulation in the North Atlantic is explored. Study of an idealized tracer shows that inferences of circulation properties from transient state distributions are impacted by uncertainties in the time-varying boundary conditions and sparse data coverage. Comparison of …
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A study of North Atlantic ventilation using transient tracers
… pathways for an ocean basin such as the North Atlantic. I present a new global model function, developed from a factor analysis of the WMO/IAEA data set, for predicting the spatial and temporal variability of bomb-tritium in precipitation. Model estimates for the atmospheric 3H delivery …
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Cenozoic deep-water agglutinated foraminifera in the North Atlantic
… assemblages and their modern analogs in the North Atlantic and adjacent areas have been studied to provide an overview of their spatial and temporal distribution and utility for paleoenvironmental analysis. Over 200 species of agglutinated foraminifera have been recognized in Paleogene …
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Constraining the North Atlantic circulation with transient tracer observations
… to constrain the ocean circulation in the North Atlantic is explored. Study of an idealized tracer shows that inferences of circulation properties from transient state distributions are impacted by uncertainties in the time-varying boundary conditions and sparse data coverage. Comparison of …
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Greenlandic ice archives of North Atlantic Common Era climate
… remote high-latitude and maritime regions of the North Atlantic. Here, I use modern, data-driven and physically-based modeling approaches to gain new insights into North Atlantic climate variability from the Greenlandic ice core archive. First, I investigate the climatic fidelity of ice core …
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Upper Ocean Transport Variability in the Subtropical North Atlantic
… individual components of the subtropical North Atlantic circulation are required. This observational study outlines efforts to monitor upper ocean transports near the 36°N latitude line and to identify possible forcing mechanisms. Specifically, an optimal interpolation scheme is employed …
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Surface forcing of the North Atlantic: accuracy and variability
A new methodology to estimate the turbulent air – sea heat and moisture fluxes and<br/>their uncertainty is developed and assessed using Voluntary Observing Ship (VOS)<br/>observations. Whilst important drivers of the global oceanic and atmospheric circulation<br/>these fluxes remain poorly …
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The North Atlantic heat budget: an Argo based study
… of the Argo array for investigating the North<br/>Atlantic heat budget. The accuracy of the Argo-based mixed layer heat storage varies<br/>significantly throughout the North Atlantic. Errors are smallest, around 10-20 Wm-2 on<br/>monthly timescales for 10° x 10° boxes, reducing to 5-10 …
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Greenlandic ice archives of North Atlantic Common Era climate
… remote high-latitude and maritime regions of the North Atlantic. Here, I use modem, data-driven and physically-based modeling approaches to gain new insights into North Atlantic climate variability from the Greenlandic ice core archive. First, I investigate the climatic fidelity of ice core …
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Cenozoic deep-water agglutinated foraminifera in the North Atlantic
Thesis (Ph. D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), February 1988.
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A study of North Atlantic ventilation using transient tracers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1991.
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Acoustic communication in the North Atlantic right whale (Eubalaena glacialis)
… is the use of sound for communication by the North Atlantic right whale (Eubalaena glacialis). The surface active group (SAG) is the predominant social interaction in this species for which use of sound has been documented. Different group compositions in SAGs indicate that both potentially …
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