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Showing 1 to 20 of 25 for “"Bering Sea"”.
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Collinear analysis of altimeter data in the Bering Sea
Eighteen months of sea surface height data from the GEOSAT altimeter along collinear subtracks were analyzed for information on the circulation pattern in the Bering Sea. Seventy subtracks from both ascending and descending orbits, with as many as 35 repeat cycles along each subtrack, were …
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Collinear analysis of altimeter data in the Bering Sea
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1989.
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Detecting and Modeling Landfast Ice in the Alaskan Bering Sea
Seasonal sea ice – ice which freezes in late fall and melts completely the following summer – is a central feature in the ecology, geomorphology, and climatology of the Bering Sea. In this region's coastal zones, sea ice becomes locked into a stationary position against the coastlines to become …
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The paleoceanography of the Bering Sea during the last glacial cycle
… stable-isotope and planktonic-fauna records from Bering Sea sediment cores, spanning the time period from 50,000 years ago to the present. During Marine Isotope Stage 3 (MIS3) at 30-20 ky BP (kiloyears before present) in a core from 1467m water depth near Umnak Plateau, there were episodic …
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The paleoceanography of the Bering Sea during the last glacial cycle
… stable-isotope and planktonic-fauna records from Bering Sea sediment cores, spanning the time period from 50,000 years ago to the present. During Marine Isotope Stage 3 (MIS3) at 30-20 ky BP (kiloyears before present) in a core from 1467m water depth near Umnak Plateau, there were episodic …
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Scientific Acoustic Data from Commercial Fishing Vessels: Eastern Bering Sea Walleye Pollock (Theragra chalcogramma)
… International Council on the Exploration of the Sea Working Group on Fisheries Acoustics, Science and Technology provided guidance on using commercial fishing vessels for collecting opportunistic acoustic data (OAD), an approach for working with these non-traditional datasets has not been …
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Oceanic Light Absorption Properties: Assessment and Characterization in the Southeastern Bering Sea Using Field and Satellite Observations
In recent decades the Bering Sea has been subjected to large climatic variability with cascading consequences on its productive marine ecosystem. Long-term as well as short-term monitoring is essential if we are to maintain its capability to supply the resources on which the national and local …
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Paleoceanography across the Pliocene–Pleistocene transition in the southern Bering Sea: dinoflagellate cysts and acritarchs from IODP Site U1341
… Program Site U1341, Bowers Ridge, southern Bering Sea, northern North Pacific has been analyzed for dinoflagellate cysts, acritarchs and other palynomorphs. Based on 86 samples, with a spacing equivalent to between 500 and 6000 years, this is the most stratigraphically detailed late Cenozoic …
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Canadian-American Relations as Exemplified in the Settlement by Arbitration of the Alaskan Boundary Dispute, the Bering Sea Controversy, and the North Atlantic Fisheries Question, 1900-1912
… the Alaska Boundary Settlement in 1903, the Bering Sea Arbitration in 1912, and the most ancient of the three disputes, the North Atlantic Fisheries Controversy in 1912. |It is not my intention to discuss all the disputes which arose between the United States and Canada through the years, nor …
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Late Cretaceous-Cenozoic Accretionary History of Volcanic Arcs and the Bering Oceanic Plateau in the Northwestern in Alaska and Northeastern Russia Constrained by Integration of Geologic, Geophysical, and Radiometric Data
… margin between northeastern Asia in Russia, the Bering Sea, and Alaska and the Aleutian Islands in the USA has slowed the tectonic understanding of this vast, 9,100,000 km2 region. In this study I have compiled geologic, gravity, magnetic, seismic reflection, well logs, heat flow, and radiometric …
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Ocean fronts formed at sea ice boundaries
Meltwater input from sea ice forms a buoyancy source for the upper ocean which creates a strong density gradient in both horizontal and vertical directions. If, in particular, the ocean density front is formed in the Bering sea during winter, the frontal dynamics are influenced by local shelf/slope …
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Relating the biogeochemistries of zinc, cobalt, and phosphorus to phytoplankton activities in the sea
… production in the subarctic North Pacific, the Bering Sea, and the North Atlantic Ocean, In the North Pacific and Bering Sea, total zinc concentrations were measured along a near-surface transect and in selected deep profiles. Zinc speciation was also measured with a novel anodic stripping …
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Relating the biogeochemistries of zinc, cobalt, and phosphorus to phytoplankton activities in the sea
… production in the subarctic North Pacific, the Bering Sea, and the North Atlantic Ocean. In the North Pacific and Bering Sea, total zinc concentrations were measured along a near-surface transect and in selected deep profiles. Zinc speciation was also measured with a novel anodic stripping …
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The Inhabited Arctic: Architecture, Time, and the Making of the Past in the Bering Strait (1760–1980)
… of exchange. This dissertation, centered on the Bering Sea and its adjacent geographies of eastern Siberia and Arctic North America, tells the story of how imperial upheaval and the rooting of colonial projects in the ground sparked a deliberate historiographic project to write the Arctic’s deep …
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The making of an American ichthyological empire: how the structure of perpetual exploitation of Bristol Bay salmon developed in southwest Alaska, 1883-1970s
… Washington officials conducted scientific research in the Bristol Bay region and redesigned the local environmental and ecological landscape. Washington officials also carried out scientific investigations not just in Bristol Bay but also in the Bering Sea and the North Pacific and …
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The Reconstruction of Climate in Beringia by analysis of Glycerol Dialkyl Glycerol Tetraether (GDGT) Distributions using High Performance Liquid Chromatography – Mass Spectrometry (HPLC-MS).
… rate, due to global warming. High-latitude seas, including the Bering Sea, are sensitive to changes in global climate, across both glacial and interglacial timescales. Membrane lipids synthesised by archaea and bacteria are retained within the sediment and when extracted give evidence to the …
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A Theoretical Approach To Assessing Annual Energy Balance In Gray Whales (eschrichtius Robustus)
… of gray whales, extent of their feeding season, and blubber depth distribution) using morphometric data, energetic costs, and food assimilation according to age and gender specific requirements. Food intake rates for gray whales of varying maturity and gender were then estimated based on …
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Managing for long term sustainability of seafood production from bottom tendered wild capture fisheries
… source of anthropogenic disturbance affecting seafloor habitats across the world’s continental shelves. Minimizing these disturbances is a key objective of ocean management; however, opportunities to meet this objective have been hampered by limited information on the spatiotemporal extent and …
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Dynamics and impacts of toxic Alexandrium catenella blooms in the Pacific Arctic
… Although there is currently a narrow seasonal window within which physiological and environmental conditions align to promote bloom initiation, this interval may become wider under continued Arctic borealization. In the summer of 2022, a large, concentrated, and highly toxic bloom of …
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Biogenic Tracers Through the Holocene on the Alaskan Shelf
… two decades including changing the amount of sea ice thickness and extent, and increased river discharge. In order to put these and other current day observations into historical context and perhaps reveal mechanisms controlling them, a suite of paleo-proxies were used to analyze two high …
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