Environmental and landscape controls of soil organic carbon storage in continuous permafrost terrain of the Taymyr Peninsula (N Siberia, Russia)
(English)Manuscript (preprint) (Other academic)
This study presents new detailed field data on soil organic carbon (SOC), total nitrogen (TN) and aboveground phytomass carbon (PhC) storage from two study areas in Taymyr Peninsula. With an integrative approach the study combined field sampling, chemical and 14C radiocarbon dating analyses with upscaling methods using land cover classifications. The estimated mean and 95% confidence interval SOC pools for the top meter of soil is 14.8 ± 1.9 and 20.8 ± 2.0 kg C m-2 in Ary-Mas and Logata, respectively. The corresponding values for TN are 1.0 ± 0.1 and 1.3 ± 0.1 kg TN m-2. On average, only about 2% (range 0-12%) of the total ecosystem C storage (considered down to 100 cm in the soil profile) is stored in PhC. In both study areas ca. 34% of the SOC 0-100 cm is stored in cryoturbated pockets, which have formed since at least the early Holocene. The higher carbon/nitrogen (C/N) ratio of this material indicates that it consists of relatively undecomposed soil organic matter (SOM). There are substantial differences within and between the two study areas, which emphasizes the need to consider both geomorphology and soil texture in the calculation of landscape-level and regional SOC stocks.
soil organic carbon, total nitrogen, phytomass carbon, permafrost, cryoturbation, C/N ratios, radiocarbon dating, landscape inventories
Earth and Related Environmental Sciences
Research subject Physical Geography
IdentifiersURN: urn:nbn:se:su:diva-115705OAI: oai:DiVA.org:su-115705DiVA: diva2:798982