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 40 for “"Beaufort Sea"”.
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Remote sensing of ice dynamics in the Beaufort Sea
Arctic summer sea ice extent has undergone dramatic declines over the past several decades, particularly in the Beaufort Sea. The comprehension of the sea ice decline requires an understanding of the annual sea ice retreat during the summer melt season. While there are observations of the seasonal …
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Air-sea CO2 cycling in the southeastern Beaufort Sea
… was conducted to examine the couplings between sea ice, ocean, atmosphere, and ecosystem in the southeastern Beaufort Sea. This thesis examines components of the system that control the air–sea exchange of carbon dioxide. Using eddy covariance measurements, we found enhanced CO2 exchange …
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Remote Sensing of Ice Dynamics in the Beaufort Sea
Arctic summer sea ice extent has undergone dramatic declines over the past several decades, particularly in the Beaufort Sea. The comprehension of the sea ice decline requires an understanding of the annual sea ice retreat during the summer melt season. While there are observations of the seasonal …
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Reflection seismic investigations of the Canadian Beaufort Sea margin, Arctic Ocean
… and sedimentary architecture of the Canadian Beaufort Sea margin are investigated using a comprehensive grid of two-dimensional seismic reflection data. Three cross-shelf troughs, representing locations of former ice streams draining a 1000 km-long section of the Laurentide Ice Sheet (LIS), …
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Interannual variability of the Pacific Water boundary current in the Beaufort Sea
… Pacific Water boundary current in the Alaskan Beaufort Sea near 152° W. Using velocity and hydrographic data from six year-long deployments during this time period, we examine the interannual variability of the current. It is found that the volume, heat, and freshwater transport have all …
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Hydrological and ecological observations along the eastern Beaufort Sea coast of Alaska
The US Beaufort Sea coast is fringed by barrier islands, which enclose numerous bays and lagoons that provide habitat for migratory fish and waterfowl that are essential to the subsistence and culture of Iñupiat communities of northern Alaska. In the eastern Beaufort, in particular, residents of …
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Interannual variability of the Pacific water boundary current in the Beaufort Sea
… Pacific Water boundary current in the Alaskan Beaufort Sea near 152° W. Using velocity and hydrographic data from six year-long deployments during this time period, we examine the interannual variability of the current. It is found that the volume, heat, and freshwater transport have all …
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Cooperation or Conflict in the Arctic? UNCLOS and the Barents and Beaufort Sea Disputes
… dilemma in the Arctic. I examine the Barents Sea dispute and the Beaufort Sea dispute as case studies to demonstrate the potential for cooperation in the Arctic. I claim that the settlement of the Barents Sea dispute between Norway and Russia gives important lessons on how to solve the …
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Ambient acoustics as indicator of environmental change in the Beaufort Sea: experiments & methods for analysis
… noise characteristics due to changes to the Beaufort Sea sound speed profile (SSP) and ice cover. Specifically, the emergence of a warm water intrusion near 70 m depth has altered the historical Arctic SSP while the ice cover has become thinner and younger due to the rise in average global …
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Ambient Acoustics as Indicator of Environmental Change in the Beaufort Sea: Experiments & Methods for Analysis
… noise characteristics due to changes to the Beaufort Sea sound speed profile (SSP) and ice cover. Specifically, the emergence of a warm water intrusion near 70 m depth has altered the historical Arctic SSP while the ice cover has become thinner and younger due to the rise in average global …
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Seasonality in the response of sea ice and upwelling to wind forcing in the southern Beaufort Sea
The seasonal pattern of ice motion in response to wind forcing and potential consequences to upwelling on the Mackenzie Shelf are considered using satellite-derived ice motion data from the National Snow and Ice Data Center and the NCEP 10 m wind data. The frequency of strong upwelling-favorable …
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Polar Bear (Ursus Maritimus) Foraging Ecology in the Western Canadian Arctic
Climate change has led to abrupt declines in sea ice over the past three decades. Polar bears (Ursus maritimus) rely on sea ice as their primary habitat to hunt marine mammal prey. Due to their position at the top of the Arctic marine food web, polar bear foraging patterns can provide insights on …
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Small scale, community based economic development in the Canadian Arctic
… and the current "bust" in the Canadian Beaufort Sea oil and gas exploration activity is a case in point. A more sustainable, alternative development strategy is provided by small scale, community based economic development.
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Low frequency active sonar performance in the Arctic Beaufort Lens
… environment present throughout much of the Beaufort Sea in the Arctic has a major effect on active acoustic transmissions. This work performs an in depth analysis of how the lower duct impacts the propagation of various active signals used commonly for acoustic communications or active …
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Low frequency active sonar performance in the Arctic Beaufort Lens
… environment present throughout much of the Beaufort Sea in the Arctic has a major effect on active acoustic transmissions. This work performs an in depth analysis of how the lower duct impacts the propagation of various active signals used commonly for acoustic communications or active …
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Radium and mercury dynamics in the Arctic: investigating terrestrial inputs, groundwater discharge, and chemical cycling in a changing climate
… Arctic Ocean is distinctive due to its extreme seasonal variations in temperature and significant terrestrial inputs, including freshwater, carbon, nutrients, and toxins. Of particular concern is mercury (Hg) in its neurotoxic form, methylmercury (MeHg), which is already beginning to adversely …
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Radium and Mercury Dynamics in the Arctic: Investigating Terrestrial Inputs, Groundwater Discharge, and Chemical Cycling in a Changing Climate
… Arctic Ocean is distinctive due to its extreme seasonal variations in temperature and significant terrestrial inputs, including freshwater, carbon, nutrients, and toxins. Of particular concern is mercury (Hg) in its neurotoxic form, methylmercury (MeHg), which is already beginning to adversely …
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A modal analysis of acoustic propagation in the changing Arctic environment
… double duct systems are seen through out the Beaufort Sea, dating back to 2004, in data made available by the Ice-Tethered Profiler program at the Woods Hole Oceanographic Institutes. The acoustic propagation through the double duct system is analyzed using normal mode analysis, through the …
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Investigating the importance of different sources of organic matter as food for the benthos on three Arctic shelves
… Three Arctic shelves were studied: the Barents Sea, the Northeast<br/>Greenland Shelf, and the Beaufort Sea Shelf, representing the often-described inflow,<br/>outflow, and interior shelves, respectively. Highly branched isoprenoids – lipid biomarkers<br/>produced with distinct structures in sea …
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Multi-path Penalty metric in underwater acoustic communication for autonomy and human decision-making
… ratio (SNR) methods in the context of the Arctic Beaufort Sea. MPP and SNR are compared alongside a third performance metric, Minimum Achievable Error (MAE), which replicates the operation of a channel estimate-based decision feedback equalizer in an acoustic modem. The three metrics are then …
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