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Non-conservative be...
Non-conservative behavior of dissolved organic carbon across the Laptev and East Siberian Seas
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- Alling, Vanja (author)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
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- Sanchez-Garcia, Laura (author)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
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Porcelli, Don (author)
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Pugach, Sveta (author)
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Vonk, Jorien E. (author)
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van Dongen, Bart (author)
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- Mörth, Carl-Magnus (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper,Stockholm Resilience Centre
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- Anderson, Leif G, 1951 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry
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- Sokolov, Alexander (author)
- Stockholms universitet,Stockholm Resilience Centre
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Andersson, Per (author)
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- Humborg, Christoph (author)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM),Stockholm Resilience Centre
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Semiletov, Igor (author)
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- Gustafsson, Örjan (author)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
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(creator_code:org_t)
- 2010
- 2010
- English.
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In: Global Biogeochemical Cycles. - 0886-6236 .- 1944-9224. ; 24, s. GB4033-
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Climate change is expected to have a strong effect on the Eastern Siberian Arctic Shelf (ESAS) region, which includes 40% of the Arctic shelves and comprises the Laptev and East Siberian seas. The largest organic carbon pool, the dissolved organic carbon (DOC), may change significantly due to changes in both riverine inputs and transformation rates; however, the present DOC inventories and transformation patterns are poorly understood. Using samples from the International Siberian Shelf Study 2008, this study examines for the first time DOC removal in Arctic shelf waters with residence times that range from months to years. Removals of up to 10%–20% were found in the Lena River estuary, consistent with earlier studies in this area, where surface waters were shown to have a residence time of approximately 2 months. In contrast, the DOC concentrations showed a strong nonconservative pattern in areas with freshwater residence times of several years. The average losses of DOC were estimated to be 30%–50% during mixing along the shelf, corresponding to a first-order removal rate constant of 0.3 yr−1. These data provide the first observational evidence for losses of DOC in the Arctic shelf seas, and the calculated DOC deficit reflects DOC losses that are higher than recent model estimates for the region. Overall, a large proportion of riverine DOC is removed from the surface waters across the Arctic shelves. Such significant losses must be included in models of the carbon cycle for the Arctic Ocean, especially since the breakdown of terrestrial DOC to CO2 in Arctic shelf seas may constitute a positive feedback mechanism for Arctic climate warming. These data also provide a baseline for considering the effects of future changes in carbon fluxes, as the vast northern carbon-rich permafrost areas draining into the Arctic are affected by global warming.
Subject headings
- NATURVETENSKAP -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Keyword
- Biochemistry
- Biokemi
- Applied Environmental Science
- tillämpad miljövetenskap
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Alling, Vanja
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Sanchez-Garcia, ...
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Porcelli, Don
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Pugach, Sveta
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Vonk, Jorien E.
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van Dongen, Bart
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show more...
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Mörth, Carl-Magn ...
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Anderson, Leif G ...
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Sokolov, Alexand ...
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Andersson, Per
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Humborg, Christo ...
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Semiletov, Igor
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Gustafsson, Örja ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Biochemistry and ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
- Articles in the publication
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Global Biogeoche ...
- By the university
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Stockholm University
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University of Gothenburg