Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Spatiotemporal variations of pCO(2) and delta C-13-DIC in subarctic streams in northern Sweden
Stockholm University, Faculty of Science, Department of Geology and Geochemistry.
Show others and affiliations
2013 (English)In: Global Biogeochemical Cycles, ISSN 0886-6236, E-ISSN 1944-9224, Vol. 27, no 1, 176-186 p.Article in journal (Refereed) Published
Abstract [en]

Current predictions of climate-related changes in high-latitude environments suggest major effects on the C export in streams and rivers. To what extent this will also affect the stream water CO2 concentrations is poorly understood. In this study we examined the spatiotemporal variation in partial pressure of CO2 (pCO(2)) and in stable isotopic composition of dissolved inorganic carbon (delta C-13-DIC) in subarctic streams in northern Sweden. The selected watersheds are characterized by large variations in high-latitude boreal forest and tundra and differences in bedrock. We found that all streams generally were supersaturated in pCO(2) with an average concentration of 850 mu atm. The variability in pCO(2) across streams was poorly related to vegetation cover, and carbonaceous bedrock influence was manifested in high DIC concentrations but not reflected in either stream pCO(2) or delta C-13-DIC. Stream water pCO(2) values were highest during winter base flow when we also observed the lowest delta C-13-DIC values, and this pattern is interpreted as a high contribution from CO2 from soil respiration. Summer base flow delta C-13-DIC values probably are more affected by in situ stream processes such as aquatic production/respiration and degassing. A challenge for further studies will be to disentangle the origin of stream water CO2 and quantify their relative importance.

Place, publisher, year, edition, pages
2013. Vol. 27, no 1, 176-186 p.
National Category
Environmental Sciences Ecology Geosciences, Multidisciplinary Meteorology and Atmospheric Sciences
Identifiers
URN: urn:nbn:se:su:diva-89539DOI: 10.1002/gbc.20024ISI: 000318275300017OAI: oai:DiVA.org:su-89539DiVA: diva2:619243
Funder
Swedish Research Council, 2007-3841Swedish Research Council, 2009-2999Formas, 214-2008-202
Note

AuthorCount:6;

Available from: 2013-05-02 Created: 2013-04-29 Last updated: 2017-12-06Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Mörth, Carl-MagnusLyon, Steve W.Humborg, Christoph
By organisation
Department of Geology and GeochemistryDepartment of Physical Geography and Quaternary GeologyDepartment of Applied Environmental Science (ITM)
In the same journal
Global Biogeochemical Cycles
Environmental SciencesEcologyGeosciences, MultidisciplinaryMeteorology and Atmospheric Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 63 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf