Soil organic carbon pools in the northern circumpolar permafrost region
Charles Tarnocai,Josep G. Canadell,Edward A. G. Schuur,Peter Kuhry,Galina Mazhitova,Sergei Zimov +5 more
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In this article, the authors reported a new estimate of the carbon pools in soils of the northern permafrost region, including deeper layers and pools not accounted for in previous analyses.Abstract:
of all soils in the northern permafrost region is approximately 18,782 � 10 3 km 2 ,o r approximately 16% of the global soil area. In the northern permafrost region, organic soils (peatlands) and cryoturbated permafrost-affected mineral soils have the highest mean soil organic carbon contents (32.2–69.6 kg m �2 ). Here we report a new estimate of the carbon pools in soils of the northern permafrost region, including deeper layers and pools not accounted for in previous analyses. Carbon pools were estimated to be 191.29 Pg for the 0–30 cm depth, 495.80 Pg for the 0–100 cm depth, and 1024.00 Pg for the 0–300 cm depth. Our estimate for the first meter of soil alone is about double that reported for this region in previous analyses. Carbon pools in layers deeper than 300 cm were estimated to be 407 Pg in yedoma deposits and 241 Pg in deltaic deposits. In total, the northern permafrost region contains approximately 1672 Pg of organic carbon, of which approximately 1466 Pg, or 88%, occurs in perennially frozen soils and deposits. This 1672 Pg of organic carbon would account for approximately 50% of the estimated global belowground organic carbon pool.read more
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Soil moisture redistribution and its effect on inter-annual active layer temperature and thickness variations in a dry loess terrace in Adventdalen, Svalbard
TL;DR: In this paper, high-resolution field data for the period 2000-2014 consisting of active layer and permafrost temperature, active layer soil moisture, and thaw depth progression from the UNISCALM research site in Adventdalen, Svalbard, is combined with a physically based coupled cryotic and hydrogeological model to investigate active layer dynamics.
Journal ArticleDOI
Estimation and Sensitivity of Carbon Storage in Permafrost of North‐Eastern Yakutia
Denis Shmelev,Alexandra Veremeeva,Gleb Kraev,Alexander Kholodov,Alexander Kholodov,Robert G. M. Spencer,Wayne S. Walker,Elizaveta Rivkina +7 more
TL;DR: In this paper, a new estimation of carbon storage in the upper 25 m of permafrost in north-eastern Yakutia was presented based on a novel database of total carbon (TC) content, bulk density and ice content, and a new map of Quaternary deposits derived from drilling data.
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Microbial Community Composition and Methanotroph Diversity of a Subarctic Wetland in Russia.
TL;DR: The methanotrophic community composition in lichen-dominated sites of a tundra wetland, therefore, was markedly different from that in boreal Sphagnum peat bogs.
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Integrating climate and local factors for geomorphological distribution models
Juha Aalto,Miska Luoto +1 more
TL;DR: In this article, the authors integrate climate and multiple local predictors to develop realistic ensemble models for the four key Earth surface processes occurring at high latitudes (slope processes, cryoturbation, nivation and palsa mires) based on the outputs of 10 modern statistical techniques.
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A centennial record of fluvial organic matter input from the discontinuous permafrost catchment of Lake Torneträsk
Jorien E. Vonk,Jorien E. Vonk,Vanja Alling,Lars Rahm,Carl-Magnus Mörth,Christoph Humborg,Örjan Gustafsson +6 more
TL;DR: In this article, a baseline for soil organic carbon release over the past century into Lake Tornetrask, the largest lake in sub-Arctic Scandinavia, through bulk geochemical and molecular radiocarbon analyses in chronologically constrained sediment cores was established.
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