uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • 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
Long-term patterns in dissolved organic carbon, major elements and trace metals in boreal headwater catchments: trends, mechanisms and heterogeneity
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
Show others and affiliations
2013 (English)In: Biogeosciences, ISSN 1726-4170, E-ISSN 1726-4189, Vol. 10, no 4, 2315-2330 p.Article in journal (Refereed) Published
Abstract [en]

The boreal landscape is a complex, spatio-temporally varying mosaic of forest and mire landscape elements that control surface water hydrology and chemistry. Here, we assess long-term water quality time series from three nested headwater streams draining upland forest (C2), peat/mire (C4) and mixed (C7) (forest and mire) catchments. Acid deposition in this region is low and is further declining. Temporal trends in weather and runoff (1981-2008), dissolved organic carbon concentration [DOC] (1993-2010) and other water quality parameters (1987-2011) were assessed. There was no significant annual trend in precipitation or runoff. However, runoff increased in March and declined in May. This suggested an earlier snowmelt regime in recent years. Significant monotonic increasing trends in air temperature and length of growing season suggested a decrease in snowfall and less spring runoff. Stream [DOC] was positively correlated with some trace metals (copper, iron and zinc) and negatively with several other chemical parameters (e. g. sulfate, conductivity, calcium). Both sulfate and conductivity showed declining trends, while a significant increase was observed in pH during winter and spring. Calcium and magnesium showed monotonic decreasing trends. The declining trajectories of stream base cation and sulfate concentrations during other times of the year were not accompanied by changes in pH and alkalinity. These results indicate subtle effects of recovery from acidification. Water temperature increased significantly both annually and in most months. A simultaneous monotonic increase in iron (Fe) and [DOC] in autumn suggests co-transport of Fe-DOC in the form of organometallic complexes. monotonic increase in UV absorbance in most months without co-occurring changes in DOC trend suggests a shift in DOC quality to a more humic-rich type. The observed increase in soil solution [DOC] and subtle trends in stream [DOC] suggest that climate rather than recovery from acidification is the dominant driver of DOC trends in the Svartberget catchment.

Place, publisher, year, edition, pages
2013. Vol. 10, no 4, 2315-2330 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-202985DOI: 10.5194/bg-10-2315-2013ISI: 000318434200009OAI: oai:DiVA.org:uu-202985DiVA: diva2:634729
Available from: 2013-07-01 Created: 2013-07-01 Last updated: 2017-12-06Bibliographically approved

Open Access in DiVA

fulltext(1012 kB)322 downloads
File information
File name FULLTEXT01.pdfFile size 1012 kBChecksum SHA-512
891b7e3f3dfe5cb9e976a0da4623f29ce2bdc5af38ba60bbc06daf7eab5ed7708ed2d30c28bf0d0497fa270b34a4055b8a8241e310c39e30ecf92927bd2579e5
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Authority records BETA

Bishop, Kevin

Search in DiVA

By author/editor
Bishop, Kevin
By organisation
LUVAL
In the same journal
Biogeosciences
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 322 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: 832 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • 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