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Evaluation of anthropogenic carbon in the Nordic Seas using observed relationships of N, P and C versus CFCs
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2008 (English)In: Progress in Oceanography, ISSN 0079-6611, E-ISSN 1873-4472, Vol. 78, no 1, 78-84 p.Article in journal (Refereed) Published
Abstract [en]

Several methods to compute the anthropogenic component of total dissolved inorganic carbon (C-T(anthro)) the ocean have been reported, all in some way deducing (a) the effect by the natural processes, and (b) the background concentration in the pre-industrial scenario. In this work we present a method of calculating C-T(anthro) using nutrient and CFC data, which takes advantage of the linear relationships found between nitrate (N), phosphate (P) and CFC-11 in the Nordic Seas sub-surface waters. The basis of the method is that older water has lower CFC-11 concentration and also has been exposed to more sinking organic matter that has decayed, resulting in the slopes of P versus CFC-11 and N versus CFC-11 being close to the classic Redfield ratio of 1:16. Combining this with the slope in total alkalinity (A(T)) versus CFC-11 to correct for the dissolution of metal carbonates gives us the possibility to deduce the concentration of anthropogenic C-T in the Nordic Seas. This further allowed us to compute the inventory of anthropogenic C-T below 250 m in the Nordic Seas in spring 2002, to similar to 1.2 Gt C. (C) 2008 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2008. Vol. 78, no 1, 78-84 p.
Keyword [en]
anthropogenic carbon; CFCs; nutrient relationships; Nordic Seas; Greenland Sea; Norwegian Sea; Iceland Sea
National Category
Natural Sciences
Research subject
SWEDARCTIC 2002, Arctic Ocean 2002
Identifiers
URN: urn:nbn:se:polar:diva-3136DOI: 10.1016/j.pocean.2007.06.001OAI: oai:DiVA.org:polar-3136DiVA: diva2:1049835
Available from: 2016-11-25 Created: 2016-11-21 Last updated: 2017-11-29

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  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
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  • asciidoc
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