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Tracing terrestrial DOC in the Baltic SeaA 3-D model study
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2016 (Engelska)Ingår i: Global Biogeochemical Cycles, ISSN 0886-6236, E-ISSN 1944-9224, Vol. 30, nr 2, s. 134-148Artikel i tidskrift (Refereegranskat) Published
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Abstract [en]

The fate of terrestrial organic matter brought to the coastal seas by rivers and its role in the global carbon cycle are still not very well known. Here the degradation rate of terrestrial dissolved organic carbon (DOCter) is studied in the Baltic Sea, a subarctic semienclosed sea, by releasing it as a tracer in a 3-D circulation model and applying linear decay constants. A good agreement with available observational data is obtained by parameterizing the degradation in two rather different ways: one by applying a decay time on the order of 10years to the whole pool of DOCter and one by dividing the DOCter into onerefractory pool and one pool subject to a decay time on the order of 1year. The choice ofparameterization has asignificant effect on where in the Baltic Sea the removal takes place, which can be of importance whenmodeling the full carbon cycle and the CO2 exchange with the atmosphere. In both cases the biogeochemical decayoperates on time scales less than the water residence time. Therefore, only a minor fraction of the DOCter reaches the North Sea, whereas approximately 80% is removed by internal sinks within the Baltic Sea. This further implies that DOCter mineralization is an important link in land-sea-atmosphere cycling of carbon in coastal and shelf seas that are heavily influenced by riverine DOC.

Ort, förlag, år, upplaga, sidor
2016. Vol. 30, nr 2, s. 134-148
Nationell ämneskategori
Oceanografi, hydrologi och vattenresurser
Forskningsämne
Oceanografi
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URN: urn:nbn:se:smhi:diva-2026DOI: 10.1002/2014GB005078ISI: 000372963900004OAI: oai:DiVA.org:smhi-2026DiVA, id: diva2:925756
Tillgänglig från: 2016-05-03 Skapad: 2016-05-02 Senast uppdaterad: 2018-01-10Bibliografiskt granskad

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Meier, MarkusHordoir, Robinson

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Global Biogeochemical Cycles
Oceanografi, hydrologi och vattenresurser

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Totalt: 146 träffar
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