7 [1] The seasonal and spatial variability of dissolved Barium (Ba) in the Amundsen Gulf, 8 southeastern Beaufort Sea, was monitored over a full year from September 2007 to 9 September 2008. Dissolved Ba displays a nutrient‐type behavior: the maximum water 10 column concentration is located below th...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.393.6092 2023-05-15T13:22:52+02:00 The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.393.6092 http://hal.inria.fr/docs/00/66/29/88/PDF/2011JC007120proof-1.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.393.6092 http://hal.inria.fr/docs/00/66/29/88/PDF/2011JC007120proof-1.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hal.inria.fr/docs/00/66/29/88/PDF/2011JC007120proof-1.pdf text ftciteseerx 2016-01-08T02:22:13Z 7 [1] The seasonal and spatial variability of dissolved Barium (Ba) in the Amundsen Gulf, 8 southeastern Beaufort Sea, was monitored over a full year from September 2007 to 9 September 2008. Dissolved Ba displays a nutrient‐type behavior: the maximum water 10 column concentration is located below the surface layer. The highest Ba concentrations 11 are typically observed at river mouths, the lowest concentrations are found in water 12 masses of Atlantic origin. Barium concentrations decrease eastward through the Canadian 13 Arctic Archipelago. Barite (BaSO4) saturation is reached at the maximum dissolved 14 Ba concentrations in the subsurface layer, whereas the rest of the water column is 15 undersaturated. A three end‐member mixing model comprising freshwater from sea‐ice 16 melt and rivers, as well as upper halocline water, is used to establish their relative 17 contributions to the Ba concentrations in the upper water column of the Amundsen 18 Gulf. Based on water column and riverine Ba contributions, we assess the depletion of 19 dissolved Ba by formation and sinking of biologically bound Ba (bio‐Ba), from which 20 we derive an estimate of the carbon export production. In the upper 50 m of the water 21 column of the Amundsen Gulf, riverine Ba accounts for up to 15 % of the available Text Amundsen Gulf Arctic Archipelago Arctic Beaufort Sea Sea ice Unknown Arctic |
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7 [1] The seasonal and spatial variability of dissolved Barium (Ba) in the Amundsen Gulf, 8 southeastern Beaufort Sea, was monitored over a full year from September 2007 to 9 September 2008. Dissolved Ba displays a nutrient‐type behavior: the maximum water 10 column concentration is located below the surface layer. The highest Ba concentrations 11 are typically observed at river mouths, the lowest concentrations are found in water 12 masses of Atlantic origin. Barium concentrations decrease eastward through the Canadian 13 Arctic Archipelago. Barite (BaSO4) saturation is reached at the maximum dissolved 14 Ba concentrations in the subsurface layer, whereas the rest of the water column is 15 undersaturated. A three end‐member mixing model comprising freshwater from sea‐ice 16 melt and rivers, as well as upper halocline water, is used to establish their relative 17 contributions to the Ba concentrations in the upper water column of the Amundsen 18 Gulf. Based on water column and riverine Ba contributions, we assess the depletion of 19 dissolved Ba by formation and sinking of biologically bound Ba (bio‐Ba), from which 20 we derive an estimate of the carbon export production. In the upper 50 m of the water 21 column of the Amundsen Gulf, riverine Ba accounts for up to 15 % of the available |
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Amundsen Gulf Arctic Archipelago Arctic Beaufort Sea Sea ice |
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Amundsen Gulf Arctic Archipelago Arctic Beaufort Sea Sea ice |
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