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 94 for “"Arctic Ocean"”.
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Arctic Ocean ambient noise.
Thesis (Ocean E)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1979.
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Acoustic mode coherence in the Arctic Ocean
… are investigated for the case of the central Arctic sound channel at very low frequencies (15-80 Hz). A detailed study of the Arctic modal structure for these frequencies reveals the central role played by the strong Arctic surface duct. The performance of each of four different modal …
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Arctic Ocean circulation in an idealized numerical model
The mid-to-deep Arctic Ocean is generally characterized by a cyclonic circulation, contained along shelves and ridges. Here we analyze the general Arctic circulation using an idealized numerical model consisting of a circular basin with two channels acting as inflow and outflow. We analyze the …
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Surface-Atmosphere coupling over the central Arctic Ocean
Recent and future changes to Arctic climate have the potential to impact the region's wildlife, vegetation and the local indigenous communities. In addition, changes in the Arctic impact lower latitudes through the modification of weather patterns and ocean circulation. There is a need to …
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Processing and inversion of Arctic Ocean refraction data
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1983.
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Arctic Ocean circulation in an idealized numerical model
The mid-to-deep Arctic Ocean is generally characterized by a cyclonic circulation, contained along shelves and ridges. Here we analyze the general Arctic circulation using an idealized numerical model consisting of a circular basin with two channels acting as inflow and outflow. We analyze the …
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Investigating virus-host interactions in a changing Arctic Ocean
The Arctic Ocean (AO) is changing at an unprecedented rate, with sea ice loss, warming and freshening affecting microbial community dynamics, including primary productivity. In the Arctic, primary production is driven by eukaryotic phytoplankton and one picoeukaryote in particular, Micromonas …
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The Effect of Arctic River Hydrological Cycles on Arctic Ocean Circulation
<p>Understanding Arctic Ocean circulation may be critical to fully understanding the global oceanic salt and heat cycles and their response to climate variability. This thesis examines how one important aspect of Arctic Ocean circulation, the effect of freshwater inflow, may contribute to the …
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Reflection seismic investigations of the Canadian Beaufort Sea margin, Arctic Ocean
… through transport of ice and freshwater to the Arctic Ocean. The objectives of this work are to constrain the number of ice advances through each trough, to discuss the possible timing of these events, and to examine the impact of Quaternary glaciation on the continental shelf and slope. The …
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A statistical analysis of ambient noise monitored in the Arctic Ocean Basin
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1983.
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Uranium-series radionuclide records of paleoceanographic and sedimentary changes in the Arctic Ocean
… in the water column and removed from the ocean by particle scavenging and burial in sediments, offer a means for paleoceanographers to examine past dynamics of both water column and sedimentary processes. I show for the first time that a state of balance exists between 230Th production and …
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Uranium-series radionuclide records of paleoceanographic and sedimentary changes in the Arctic Ocean
… in the water column and removed from the ocean by particle scavenging and burial in sediments, offer a means for paleoceanographers to examine past dynamics of both water column and sedimentary processes. I show for the first time that a state of balance exists between ²³⁰Th production and …
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Moored observations of shelfbreak processes at the inflow to and outflow from the Arctic Ocean
… at the inflow to and the outflow from the Arctic Ocean. Pacific Water entering the Arctic Ocean forms the Western Arctic shelfbreak current along the Beaufort Sea slope. Data from the mooring array at 152°W—approximately 150 km east of Pt. Barrow, AK—reveals that this current has two …
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NUMERICAL MODELING OF THE VERTICAL HEAT TRANSPORT THROUGH THE DIFFUSIVE LAYER OF THE ARCTIC OCEAN
The Arctic Ocean has been a subject of increasing interest in recent years due to the reduction of the sea-ice thickness and spatial coverage and its implications for climate change. The future state of the Arctic is likely to be linked to vertical heat transport by microscale processes, …
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Moored observations of shelfbreak processes at the inflow to and outflow from the Arctic Ocean
… at the inflow to and the outflow from the Arctic Ocean. Pacific Water entering the Arctic Ocean forms the Western Arctic shelfbreak current along the Beaufort Sea slope. Data from the mooring array at 152°W-approximately 150 km east of Pt. Barrow, AK-reveals that this current has two …
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Examining Melt Pond Dynamics and Light Availability in the Arctic Ocean via High Resolution Satellite Imagery
<p>As the Arctic experiences consequences of climate change, a shift from thicker, multi-year ice to thinner, first-year ice has been observed. First-year ice is prone to extensive pools of meltwater (“melt ponds”) forming on its surface, which enhance light transmission to the ocean. Changes in …
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Coupling Metaproteomics with Taxonomy to Determine Responses of Bacterioplankton to Organic Perturbations in the Western Arctic Ocean
… to their regulation of elemental cycles in the oceans. The primary goal of this dissertation was to investigate the community metabolic and taxonomic responses and the degradation potential of two compositionally distinct marine microbiomes within the shallow shelf ecosystem of the Chukchi Sea …
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A study of the large scale circulation and water mass formation in the Nordic seas and Arctic Ocean
… and Scotland, and flows northward towards the Arctic Ocean and the Barents Sea. The transformation is due to a large net annual heat loss over the North Atlantic Current, combined with a long residence time (2-3 years) and a large surface area. After subduction, one branch of the North Atlantic …
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An analysis of Atlantic Water in the Arctic Ocean using the Arctic Subpolar Gyre State Estimate and observations
The Atlantic Water (AW) Layer in the Arctic Subpolar gyre sTate Estimate (ASTE), a regional, medium-resolution coupled ocean-sea ice state estimate, is analyzed for the first time using bounding isopycnals. A surge of AW, marked by rapid increases in mean AW Layer potential temperature and AW Layer …
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A study of the large scale circulation and water mass formation in the Nordic seas and Arctic ocean
… and Planetary Sciences, and the Woods Hole Oceanographic Institution, 1994.
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