umu.sePublikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Permafrost Boundary Shift in Western Siberia May Not Modify Dissolved Nutrient Concentrations in Rivers
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap.ORCID-id: 0000-0002-2319-8190
Visa övriga samt affilieringar
2017 (Engelska)Ingår i: Water, ISSN 2073-4441, E-ISSN 2073-4441, Vol. 9, nr 12, artikel-id 985Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Identifying the landscape and climate factors that control nutrient export by rivers in high latitude regions is one of the main challenges for understanding the Arctic Ocean response to ongoing climate change. This is especially true for Western Siberian rivers, which are responsible for a significant part of freshwater and solutes delivery to the Arctic Ocean and are draining vast permafrost-affected areas most vulnerable to thaw. Forty-nine small- and medium-sized rivers (10-100,000 km(2)) were sampled along a 1700 km long N-S transect including both permafrost-affected and permafrost-free zones of the Western Siberian Lowland (WSL) in June and August 2015. The N, P, dissolved organic and inorganic carbon (DOC and DIC, respectively), particular organic carbon (POC), Si, Ca, K, Fe, and Mn were analyzed to assess the role of environmental parameters, such as temperature, runoff, latitude, permafrost, bogs, lake, and forest coverage on nutrient concentration. The size of the watershed had no influence on nutrient concentrations in the rivers. Bogs and lakes retained nutrients whereas forests supplied P, Si, K, Ca, DIC, and Mn to rivers. The river water temperature was negatively correlated with Si and positively correlated with Fe in permafrost-free rivers. In permafrost-bearing rivers, the decrease in T northward was coupled with significant increases in PO4, P-tot, NH4, pH, DIC, Si, Ca, and Mn. North of the permafrost boundary (61 degrees N), there was no difference in nutrient concentrations among permafrost zones (isolated, sporadic, discontinuous, and continuous). The climate warming in Western Siberia may lead to a permafrost boundary shift northward. Using a substituting space for time scenario, this may decrease or maintain the current levels of N, P, Si, K, Ca, DIC, and DOC concentrations in rivers of continuous permafrost zones compared to the present state. As a result, the export flux of nutrients by the small- and medium-sized rivers of the Western Siberian subarctic to the Arctic Ocean coastal zone may remain constant, or even decrease.

Ort, förlag, år, upplaga, sidor
2017. Vol. 9, nr 12, artikel-id 985
Nyckelord [en]
nitrate, ammonium, phosphorus, phosphate, river, permafrost, Siberia
Nationell ämneskategori
Ekologi
Identifikatorer
URN: urn:nbn:se:umu:diva-144112DOI: 10.3390/w9120985ISI: 000419225500077OAI: oai:DiVA.org:umu-144112DiVA, id: diva2:1177775
Forskningsfinansiär
Vetenskapsrådet, 325-2014-6898Tillgänglig från: 2018-01-26 Skapad: 2018-01-26 Senast uppdaterad: 2018-06-09Bibliografiskt granskad

Open Access i DiVA

fulltext(3561 kB)67 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 3561 kBChecksumma SHA-512
03312c3dd5f1b2d9fd2d97198d2f30bfd77514a927850c7da2b80e363cb40d75a3af5e85511de17c0a565bbf8a2ccade5ea245ec5ff3e752ff1ae4348f8c3b7b
Typ fulltextMimetyp application/pdf

Övriga länkar

Förlagets fulltext

Personposter BETA

Serikova, SvetlanaKarlsson, Jan

Sök vidare i DiVA

Av författaren/redaktören
Serikova, SvetlanaKarlsson, Jan
Av organisationen
Institutionen för ekologi, miljö och geovetenskap
I samma tidskrift
Water
Ekologi

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 67 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 139 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf