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
Spatial variation in concentration and sources of organic carbon in the Lena River, Siberia
Swedish Museum of Natural History, Department of Geology.
Stockholm University.
University of Oxford.
Swedish Museum of Natural History, Department of Geology.
Show others and affiliations
2017 (English)In: Journal of Geophysical Research - Biogeosciences, ISSN 2169-8953, E-ISSN 2169-8961, Vol. 122Article in journal (Refereed) Published
Abstract [en]

Global warming in permafrost areas is expected to change fluxes of riverine organic carbon (OC) 22 to the Arctic Ocean. Here OC concentrations, stable carbon isotope signatures (δ13C) and carbon-23 nitrogen ratios (C/N) are presented from 22 sampling stations in the Lena River and 40 of its 24 tributaries. Sampling was conducted during two expeditions: the first in July 2012 in the south 25 and southeastern region and the second in June 2013 in the northern region of the Lena basin. 26 The data showed significant spatial differences in concentrations and major sources of OC. Mean 27 sub-catchment slopes were correlated with OC concentrations, implying that mountainous areas 28 in general had lower concentrations than lowland areas. δ13C and C/N data from tributaries 29 originating in mountainous areas indicated that both dissolved and particulate OC (DOC and 30 POC) were mainly derived from soil organic matter (SOM). In contrast, tributaries originating in 31 lowland areas had larger contributions from fresh vegetation to DOC, while aquatically produced 32 OC was the major source of POC. We suggest that these differences in dominant sources 33 indicated differences in dominant flow pathways. Tributaries with larger influence of fresh 34 vegetation probably had surficial flow pathways, while tributaries with more SOM influence had 35 deeper water flow pathways. Thus, the future export of OC to the Arctic Ocean will likely be 36 controlled by changes in spatial patterns in hydroclimatology and the depth of the active layers 37 influencing the dominant water flow pathways in Arctic river basins.

Place, publisher, year, edition, pages
New York, 2017. Vol. 122
Keyword [en]
DOC, POC Lena River
National Category
Geochemistry
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-2462DOI: 10.1002/2017JG003858OAI: oai:DiVA.org:nrm-2462DiVA: diva2:1147693
Funder
Swedish Research Council, 621-2010-3917
Available from: 2017-10-07 Created: 2017-10-07 Last updated: 2017-10-09Bibliographically approved

Open Access in DiVA

fulltext(2809 kB)2 downloads
File information
File name FULLTEXT01.pdfFile size 2809 kBChecksum SHA-512
c063326ed6992b431177b08718f5899b1fea133f203b0d1240a0b991e023162b587aa2339ceec70bde0ac5706d031009cfcc43e0b1c7cedcf0cb357d44ccda85
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Kutscher, LiselottHirst, CatherineAndersson, Per
By organisation
Department of Geology
In the same journal
Journal of Geophysical Research - Biogeosciences
Geochemistry

Search outside of DiVA

GoogleGoogle Scholar
Total: 2 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

Altmetric score

Total: 11 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