Impact of biogeochemical processes and environmental factors on the calcium carbonate saturation state in the Circumpolar Flaw Lead in the Amundsen Gulf, Arctic Ocean
Identifieur interne : 001606 ( Istex/Curation ); précédent : 001605; suivant : 001607Impact of biogeochemical processes and environmental factors on the calcium carbonate saturation state in the Circumpolar Flaw Lead in the Amundsen Gulf, Arctic Ocean
Auteurs : Melissa Chierici [Suède, Norvège] ; Agneta Fransson [Suède] ; Bruno Lansard [Canada] ; Lisa A. Miller [Canada] ; Alfonso Mucci [Canada] ; Elizabeth Shadwick [Canada, Australie] ; Helmuth Thomas [Canada] ; J. Tremblay [Canada] ; Tim N. Papakyriakou [Canada]Source :
- Journal of Geophysical Research: Oceans [ 0148-0227 ] ; 2011-09.
Abstract
We report on measurements across an annual cycle of carbon dioxide system parameters in the polar mixed layer (PML) of the circumpolar flaw lead in the Amundsen Gulf, Arctic Ocean. From these and other properties (nitrate, S, T) of the PML, we found that biological processes (photosynthesis and respiration) accounted for about 50% of the monthly variations in the carbonate ion concentration, [CO32−] and Ω, the saturation state of these waters with respect to calcite (ΩCa) and aragonite (ΩAr). Vertical mixing and salinity changes had equal impacts over the annual cycle. The impact of sea ice meltwater resulted in decreasing Ω values in summer, but most of this change was offset by the Ω increase as a result of CO2 drawdown during biological photosynthesis.
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DOI: 10.1029/2011JC007184
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Tremblay</name><affiliation wicri:level="1"><mods:affiliation>Department of Biology, Laval University, Quebec, Ontario, Canada</mods:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Biology, Laval University, Quebec, Ontario</wicri:regionArea></affiliation></author><author><name sortKey="Papakyriakou, Tim N" sort="Papakyriakou, Tim N" uniqKey="Papakyriakou T" first="Tim N." last="Papakyriakou">Tim N. Papakyriakou</name><affiliation wicri:level="1"><mods:affiliation>Center for Earth Observation Science, University of Manitoba, Winnipeg, Manitoba, Canada</mods:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Center for Earth Observation Science, University of Manitoba, Winnipeg, Manitoba</wicri:regionArea></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Geophysical Research: Oceans</title><title level="j" type="abbrev">J. Geophys. Res.</title><idno type="ISSN">0148-0227</idno><idno type="eISSN">2156-2202</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2011-09">2011-09</date><biblScope unit="volume">116</biblScope><biblScope unit="issue">C9</biblScope><biblScope unit="page" from="/">n/a</biblScope><biblScope unit="page" to="/">n/a</biblScope></imprint><idno type="ISSN">0148-0227</idno></series><idno type="istex">F96D249D1212E6BCCC9C82123741664DCE40DAAF</idno><idno type="DOI">10.1029/2011JC007184</idno><idno type="ArticleID">2011JC007184</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0148-0227</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">We report on measurements across an annual cycle of carbon dioxide system parameters in the polar mixed layer (PML) of the circumpolar flaw lead in the Amundsen Gulf, Arctic Ocean. From these and other properties (nitrate, S, T) of the PML, we found that biological processes (photosynthesis and respiration) accounted for about 50% of the monthly variations in the carbonate ion concentration, [CO32−] and Ω, the saturation state of these waters with respect to calcite (ΩCa) and aragonite (ΩAr). Vertical mixing and salinity changes had equal impacts over the annual cycle. The impact of sea ice meltwater resulted in decreasing Ω values in summer, but most of this change was offset by the Ω increase as a result of CO2 drawdown during biological photosynthesis.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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