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Export of Pacific carbon through the Arctic Archipelago to the North Atlantic


Shadwick, EH and Thomas, H and Gratton, Y and Leong, D and Moore, SA and Papakyriakou, T and Prowe, AEF, Export of Pacific carbon through the Arctic Archipelago to the North Atlantic, Continental Shelf Research, 31, (7-8) pp. 806-816. ISSN 0278-4343 (2011) [Refereed Article]

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DOI: doi:10.1016/j.csr.2011.01.014


During an east-to-west transect through the Canadian Arctic Archipelago, dissolved inorganic carbon (DIC) and total alkalinity (TA) were measured. The watermass composition throughout the Archipelago is determined using TA and the seawater oxygen isotope fractionation (d18O) data, and the carbon characteristics of these waters are examined. The influence of the Mackenzie River is primarily limited to the upper water column in the western Archipelago while the fraction of sea-ice melt water in the surface waters increases eastward with maximum values at the outflows of Jones and Lancaster Sounds. The depth of Pacific-origin upper halocline waters increases eastward through the Archipelago. In the western Archipelago, non-conservative variations in deep water DIC are used to compute a subsurface carbon surplus, which appears to be fueled by organic matter produced in the surface layer and by benthic respiration. The eastward transport of carbon from the Pacific, via the Arctic Archipelago, to the North Atlantic is estimated, and the impact of increased export of sea-ice melt water to the North Atlantic is discussed.

Item Details

Item Type:Refereed Article
Keywords:Arctic Archipelago, inorganic carbon system, international polar year
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Chemical oceanography
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Measurement and assessment of estuarine water quality
UTAS Author:Shadwick, EH (Dr Elizabeth Shadwick)
ID Code:75936
Year Published:2011
Web of Science® Times Cited:22
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2012-02-21
Last Modified:2017-10-31

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