Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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
Effects of permafrost and hydrology on the composition and transport of dissolved organic carbon in a subarctic peatland complex
Responsible organisation
2012 (English)In: Journal of Geophysical Research, ISSN 0148-0227, E-ISSN 2156-2202, Vol. 117, no G1, p. 1-15, article id G01005Article in journal (Refereed) Published
Abstract [en]

Loss of permafrost can modify the export and composition of dissolved organic carbon (DOC) from subarctic peatlands by changing the hydrological regime and altering ecosystem structure and function. In Stordalen peatland complex (68.20°N, 19.03°E) recent permafrost thaw has caused a conversion of the palsa parts (an ombrotrophic, permafrost affected peatland type) into both bog and flow-through fen peatland types. Within the Stordalen peatland complex we estimated the DOC mass balance and assessed DOC composition for one palsa catchment, one bog catchment and two fens in order to assess the possible impacts of permafrost thaw on peatland complex DOC export. The fens were found to have higher net DOC export rates at 8.1 and 7.0 g C m?2 yr?1 than either the palsa or bog catchments, at 3.2 and 3.5 g C m?2 yr?1, respectively. The snowmelt period was more important for the annual DOC export from the palsa and bog catchments than for the fens, representing 65?100% of the palsa and bog catchment exports while 35?60% of the net fen exports. DOC exported from the palsa and bog catchments were characterized by high aromaticity, molecular weight, C/N ratios, and contained DOC of primarily terrestrial origin. The fens exhibited a shift in DOC composition between inflows and outflows that suggested that fens act as catchment locations for degradation and transformation of DOC. Permafrost thaw can thus alter the magnitude, timing, and composition of subarctic peatland DOC exports due to interactions among peatland type, permafrost conditions, and hydrological setting.

Place, publisher, year, edition, pages
John Wiley & Sons, Ltd , 2012. Vol. 117, no G1, p. 1-15, article id G01005
Keywords [en]
dissolved organic carbon, hydrology, peatlands, permafrost, subarctic, wetlands
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:polar:diva-7960DOI: 10.1029/2011JG001819OAI: oai:DiVA.org:polar-7960DiVA, id: diva2:1284313
Conference
2019/01/31
Available from: 2019-01-31 Created: 2019-01-31 Last updated: 2019-01-31Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full texthttps://doi.org/10.1029/2011JG001819
In the same journal
Journal of Geophysical Research
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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