Storage, Landscape Distribution, and Burial History of Soil Organic Matter in Contrasting Areas of Continuous Permafrost
2015 (English)In: Arctic, Antarctic and Alpine research, ISSN 1523-0430, Vol. 47, no 1, 71-88 p.Article in journal (Refereed) Published
This study describes and compares soil organic matter (SOM) quantity and characteristics in two areas of continuous permafrost, a mountainous region in NE Greenland (Zackenberg study site) and a lowland region in NE Siberia (Cherskiy and Shalaurovo study sites). Our assessments are based on stratified-random landscape-level inventories of soil profiles down to 1 m depth, with physico-chemical, elemental, and radiocarbon-dating analyses. The estimated mean soil organic carbon (SOC) storage in the upper meter of soils in the NE Greenland site is 8.3 ± 1.8 kg C m-2 compared to 20.3 ± 2.2 kg C m-2 and 30.0 ± 2.0 kg C m-2 in the NE Siberian sites (95% confidence intervals). The lower SOC storage in the High Arctic site in NE Greenland can be largely explained by the fact that 59% of the study area is located at higher elevation with mostly barren ground and thus very low SOC contents. In addition, SOC-rich fens and bogs occupy a much smaller proportion of the landscape in NE Greenland (∼3%) than in NE Siberia (∼20%). The contribution of deeper buried C-enriched material in the mineral soil horizons to the total SOC storage is lower in the NE Greenland site (∼13%) compared to the NE Siberian sites (∼24%–30%). Buried SOM seems generally more decomposed in NE Greenland than in NE Siberia, which we relate to different burial mechanisms prevailing in these regions.
Place, publisher, year, edition, pages
Colorado, 2015. Vol. 47, no 1, 71-88 p.
soil organic carbon, degree of decomposition in soil organic matter, radiocarbon dating, C/N ratios, continuous permafrost, slope processes, cryoturbation
Research subject Physical Geography
IdentifiersURN: urn:nbn:se:su:diva-115639DOI: 10.1657/AAAR0014-027ISI: 000350219000007OAI: oai:DiVA.org:su-115639DiVA: diva2:798979