Oxygen isotope ratio, barium and salinity in waters around the North American coast from the Pacific to the Atlantic: Implications for freshwater sources to the Arctic throughflow Public Deposited

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  • In 2002, oxygen isotope ratios of water (H2 18O/H2 16O), dissolved barium, and salinity were measured in surface waters around northern North America to identify freshwater sources and to provide a large-scale background for interpretation of regional inputs and processes. Oxygen isotope ratios showed that precipitation, river runoff, and sea ice meltwater were all significant contributors to the freshwater carried by the coastal component of the Arctic throughflow. Precipitation and runoff contributed 40% and 60%, respectively, to the freshwater found in surface waters along the Pacific coast. Sea ice meltwater contributed up to 65% to waters residing near the Mackenzie River and in the Canadian Arctic Archipelago. The salinity-barium relationship, after being corrected for dilution by sea ice meltwater, indicated that freshwater from the Mackenzie River flowed eastward into Amundsen Gulf. It did not, however, continue eastward through Dolphin Union Strait and Coronation Gulf in 2002. In the eastern part of the Canadian Arctic Archipelago, Baffin Bay and the Labrador Sea, barium concentrations in surface waters were low, the result of biological activity and/or local freshwater inputs with low barium concentrations.
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  • Yamamoto-Kawai, M., Carmack, E. C., McLaughlin, F. A., & Falkner, K. K. (2010). Oxygen isotope ratio, barium and salinity in waters around the North American coast from the Pacific to the Atlantic: Implications for freshwater sources to the Arctic throughflow. Journal of marine reserach, 68, 97-117.
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  • description.provenance : Made available in DSpace on 2011-10-13T22:22:25Z (GMT). No. of bitstreams: 1 FalknerKelly.COAS.OxygenIsotopeRatio.pdf: 2955749 bytes, checksum: bc931ca18b1ab2dd469c4a1478358289 (MD5) Previous issue date: 2010
  • description.provenance : Submitted by Deborah Campbell (deborah.campbell@oregonstate.edu) on 2011-09-21T16:42:55Z No. of bitstreams: 1 FalknerKelly.COAS.OxygenIsotopeRatio.pdf: 2955749 bytes, checksum: bc931ca18b1ab2dd469c4a1478358289 (MD5)
  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2011-10-13T22:22:25Z (GMT) No. of bitstreams: 1 FalknerKelly.COAS.OxygenIsotopeRatio.pdf: 2955749 bytes, checksum: bc931ca18b1ab2dd469c4a1478358289 (MD5)

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