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The U.S. Geological Survey recovered 9 piston cores from theNorthwind Ridge in the Canada Basin of the Arctic Ocean from acruise of the USCGC Polar Star during 1988. Preliminaryanalysis of the cores suggests sediments deposited onNorthwind Ridge preserve a detailed record of glacial andinterglacial cycles for the last few hundred-thousand to onemillion years. This report includes quantitative data onforaminifers and selected sediment size-fraction data insamples from Northwind Ridge core PI-88AR P5.
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The U.S. Geological Survey recovered 9 piston cores from theNorthwind Ridge in the Canada Basin of the Arctic Ocean from acruise of the USCGC Polar Star during 1988. Preliminaryanalysis of the cores suggests sediments deposited onNorthwind Ridge preserve a detailed record of glacial andinterglacial cycles for the last few hundred-thousand to onemillion years. This report includes quantitative data onforaminifers and selected sediment size-fraction data in 98samples from Northwind Ridge core PI-88AR P3, 51 samples fromcore PI-88-AR P7 and 117 samples from core PI-88-AR P9.
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This report summarizes data acquired from 1990 to 1994 forthe gas-hydrate portion of the USGS project "Permafrostand gas hydrate as possible sources of methane" of theUSGS Global Change and Climate History program. Theobjective of this project has been to test the hypothesisthat gas hydrate deposits of the Beaufort Sea continentalshelf are destabilized by the ~10�C temperature increasethat has resulted from the Holocene transgression of theArctic Ocean. To test this idea we have selected an areaoff the north coast of Alaska centered on Harrison Bay. Wehave measured the concentration of methane in surficialsediments, in the water column when ice is present andabsent, and in seasonal sea ice. Our results show thatmore...
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This report summarizes data acquired from 1990 to 1994 for the gas-hydrate portion of the USGS project "Permafrost and gas hydrate as possible sources of methane" of the USGS Global Change and Climate History program. The objective of this project has been to test the hypothesis that gas hydrate deposits of the Beaufort Sea continental shelf are destabilized by the ~10°C temperature increase that has resulted from the Holocene transgression of the Arctic Ocean. To test this idea we have selected an area off the north coast of Alaska centered on Harrison Bay. We have measured the concentration of methane in surficial sediments, in the water column when ice is present and absent, and in seasonal sea ice. Our results...


    map background search result map search result map Methane in coastal sea water, sea ice, and bottom sediments, Beaufort Sea, Alaska Planktic foraminifer census data from Northwind Ridgecore 5 Arctic Ocean Planktic foraminifer census data from Northwind Ridgecores PI-88-AR P3, PI-88-AR P7, and PI-88-AR P9, ArcticOcean Methane in coastal sea water, sea ice, and bottomsediments, Beaufort Sea, Alaska Planktic foraminifer census data from Northwind Ridgecores PI-88-AR P3, PI-88-AR P7, and PI-88-AR P9, ArcticOcean Methane in coastal sea water, sea ice, and bottomsediments, Beaufort Sea, Alaska Methane in coastal sea water, sea ice, and bottom sediments, Beaufort Sea, Alaska