onr:"swepub:oai:DiVA.org:liu-79694"
Search: onr:"swepub:oai:DiVA.org:liu-79694" > Mapping the degree ...
- 1 of 1
- Previous record
- Next record
- To hitlist
Mapping the degree of decomposition and thaw remobilization potential of soil organic matter in discontinuous permafrost terrain
-
- Hugelius, Gustaf (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK),Stockholm University, Sweden
-
- Routh, Joyanto (author)
- Linköpings universitet,Tema vatten i natur och samhälle,Filosofiska fakulteten
-
- Kuhry, Peter (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK),Stockholm University, Sweden
- show more...
- show less...
- (creator_code:org_t)
- American Geophysical Union (AGU), 2012
- 2012
- English.
- In: Journal of Geophysical Research. - : American Geophysical Union (AGU). - 0148-0227 .- 2156-2202. ; 117:G2
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- [1] Soil organic matter (SOM) stored in permafrost terrain is a key component in the global carbon cycle, but its composition and lability are largely unknown. We characterize and assess the degree of decomposition of SOM at nine sites representing major land-cover and soil types (including peat deposits) in an area of discontinuous permafrost in the European Russian Arctic. We analyze the elemental and stable isotopic composition of bulk SOM, and the degree of humification and elemental composition of humic acids (HA). The degree of decomposition is low in the O-horizons of mineral soils and peat deposits. In the permafrost free non-peatland soils there is enrichment of13C and 15N, and decrease in bulk C/N ratios indicating more decomposed material with depth. Spectral characterization of HA indicates low humification in O-horizons and peat deposits, but increase in humification in the deeper soil horizons of non-peatland soils, and in mineral horizons underlying peat deposits. GIS based maps indicate that less decomposed OM characteristic of the O-horizon and permafrost peat deposits constitute the bulk of landscape SOM (>70% of landscape soil C). We conclude, however, that permafrost has not been the key environmental factor controlling the current degree of decomposition of SOM in this landscape due to relatively recent permafrost aggradation. In this century, active layer deepening will mainly affect SOM with a relatively high degree of decomposition in deeper mineral soil horizons. Additionally, thawing permafrost in peat plateaus may cause rapid remobilization of less decomposed SOM through thermokarst expansion.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- SOCIAL SCIENCES
- SAMHÄLLSVETENSKAP
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Journal of Geophysical Research (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Hugelius, Gustaf
- Routh, Joyanto
- Kuhry, Peter
- Crill, Patrick
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Earth and Relate ...
- Articles in the publication
- Journal of Geoph ...
- By the university
- Linköping University
- Stockholm University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
