umu.sePublications
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
Catchment-scale dissolved carbon concentrations and export estimates across six subarctic streams in northern Sweden
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. (CIRC ; Arcm)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. (CIRC ; Arcum)
Show others and affiliations
2014 (English)In: Biogeosciences, ISSN 1726-4170, E-ISSN 1726-4189, Vol. 11, no 2, 525-537 p.Article in journal (Refereed) Published
Abstract [en]

Climatic change is currently enhancing permafrost thawing and the flow of water through the landscape in subarctic and arctic catchments, with major consequences for the carbon export to aquatic ecosystems. We studied stream water carbon export in several tundra-dominated catchments in northern Sweden. There were clear seasonal differences in both dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) concentrations. The highest DOC concentrations occurred during the spring freshet while the highest DIC concentrations were always observed during winter baseflow conditions for the six catchments considered in this study. Long-term trends for the period 1982 to 2010 for one of the streams showed that DIC concentrations has increased by 9% during the 28 yr of measurement while no clear trend was found for DOC. Similar increasing trends were also found for conductivity, Ca and Mg. When trends were discretized into individual months, we found a significant linear increase in DIC concentrations with time for September, November and December. In these subarctic catchments, the annual mass of C exported as DIC was in the same order of magnitude as DOC; the average proportion of DIC to the total dissolved C exported was 61% for the six streams. Furthermore, there was a direct relationship between total runoff and annual dissolved carbon fluxes for these six catchments. These relationships were more prevalent for annual DIC exports than annual DOC exports in this region. Our results also highlight that both DOC and DIC can be important in high-latitude ecosystems. This is particularly relevant in environments where thawing permafrost and changes to subsurface ice due to global warming can influence stream water fluxes of C. The large proportion of stream water DIC flux also has implications on regional C budgets and needs to be considered in order to understand climate-induced feedback mechanisms across the landscape.

Place, publisher, year, edition, pages
2014. Vol. 11, no 2, 525-537 p.
National Category
Ecology
Identifiers
URN: urn:nbn:se:umu:diva-93300DOI: 10.5194/bg-11-525-2014ISI: 000331260900022OAI: oai:DiVA.org:umu-93300DiVA: diva2:747196
Funder
Swedish Research Council, 70384101Swedish Research Council Formas, 214-2008-202
Available from: 2014-09-16 Created: 2014-09-16 Last updated: 2017-12-05Bibliographically approved

Open Access in DiVA

fulltext(856 kB)63 downloads
File information
File name FULLTEXT01.pdfFile size 856 kBChecksum SHA-512
f9d8c3729811fbf66a0dd26af23ad0d9e5bfbbd602a828b895d6443936090f0a8a97aa5181e5d4446ce79daca6d7d9cd6b4c2cd556cd0e6530881f49f76dff87
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Authority records BETA

Giesler, ReinerKarlsson, Jan

Search in DiVA

By author/editor
Giesler, ReinerKarlsson, Jan
By organisation
Department of Ecology and Environmental Sciences
In the same journal
Biogeosciences
Ecology

Search outside of DiVA

GoogleGoogle Scholar
Total: 63 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 208 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