Inorganic carbon cycling and biogeochemical processes in an Arctic inland sea (Hudson Bay)

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dc.contributor.authorBurt, William J.
dc.contributor.authorThomas, Helmuth
dc.contributor.authorMiller, Lisa A.
dc.contributor.authorGranskog, Mats A.
dc.contributor.authorPapakyriakou, Tim N.
dc.contributor.authorPengelly, Leah
dc.date.accessioned2020-07-10T15:25:46Z
dc.date.available2020-07-10T15:25:46Z
dc.date.issued2016-08-19
dc.date.submitted2020-07-10T15:25:45Zen_US
dc.description.abstractThe distributions of carbonate system parameters in Hudson Bay, which not only receives nearly one-third of Canada’s river discharge but is also subject to annual cycles of sea-ice formation and melt, indicate that the timing and magnitude of freshwater inputs play an important role in carbon biogeochemistry and acidification in this unique Arctic ecosystem. This study uses basin-wide measurements of dissolved inorganic carbon (DIC) and total alkalinity (TA), as well as stable isotope tracers ( 18O and 13CDIC/, to provide a detailed assessment of carbon cycling processes within the bay. Surface distributions of carbonate parameters reveal the particular importance of freshwater inputs in the southern portion of the bay. Based on TA, we surmise that the deep waters in the Hudson Bay are largely of Pacific origin. Riverine TA end-members vary significantly both regionally and with small changes in near-surface depths, highlighting the importance of careful surface water sampling in highly stratified waters. In an along-shore transect, large increases in subsurface DIC are accompanied by equivalent decreases in 13CDIC with no discernable change in TA, indicating a respiratory DIC production on the order of 100 μmol kg-1 DIC during deep water circulation around the bay.en_US
dc.identifier.citationBurt, W. J., Thomas, H., Miller, L. A., Granskog, M. A., Papakyriakou, T. N., and Pengelly, L.: Inorganic carbon cycling and biogeochemical processes in an Arctic inland sea (Hudson Bay), Biogeosciences, 13, 4659–4671, https://doi.org/10.5194/bg-13-4659-2016, 2016.en_US
dc.identifier.doi10.5194/bg-13-4659-2016
dc.identifier.urihttp://hdl.handle.net/1993/34766
dc.language.isoengen_US
dc.publisherCopernicus Publicationsen_US
dc.rightsopen accessen_US
dc.subjectInorganic Carbonen_US
dc.subjectbiogeochemicalen_US
dc.subjectArcticen_US
dc.subjectHudson Bayen_US
dc.subjectcarbon cyclingen_US
dc.titleInorganic carbon cycling and biogeochemical processes in an Arctic inland sea (Hudson Bay)en_US
dc.typeTechnical Reporten_US
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