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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Spatial variation in landscape‐level CO2 and CH4 fluxes from arctic coastal tundra: influence from vegetation, wetness, and the thaw lake cycle
TL;DR: It is found that the thaw lake cycle was largely responsible for spatial variation in CO2 flux, mostly due to its control on gross primary productivity (GPP), and current lakes were significant CO2 sources that varied little.
Journal ArticleDOI
Spatial heterogeneity and environmental predictors of permafrost region soil organic carbon stocks
Umakant Mishra,Gustaf Hugelius,Eitan Shelef,Yuanhe Yang,Jens Strauss,A. V. Lupachev,Jennifer W. Harden,Jennifer W. Harden,Julie D. Jastrow,Chien-Lu Ping,William J. Riley,Edward A. G. Schuur,Roser Matamala,Matthias Benjamin Siewert,Lucas E. Nave,Charles D. Koven,Matthias Fuchs,Juri Palmtag,Peter Kuhry,Claire C. Treat,Sebastian Zubrzycki,Forrest M. Hoffman,Forrest M. Hoffman,Bo Elberling,Philip Camill,Alexandra Veremeeva,Andrew Orr +26 more
TL;DR: In this paper, the authors provided the first high-resolution geospatial assessment of permafrost region organic carbon stocks and their relationship with environmental factors, which are crucial for modeling the response of permaferost affected soils to changing climate.
Journal ArticleDOI
Multi-proxy study of soil organic matter dynamics in permafrost peat deposits reveal vulnerability to climate change in the European Russian Arctic
Joyanto Routh,Gustaf Hugelius,Peter Kuhry,Timothy R. Filley,Päivi Kaislahti Tillman,Marina Becher,Marina Becher,Patrick M. Crill +7 more
TL;DR: Soil organic carbon (SOC) in permafrost terrain is vulnerable to climate change as discussed by the authors, but we know little about its chemical composition and composition and it is not known how it is stored.
Journal ArticleDOI
Groundwater as a major source of dissolved organic matter to Arctic coastal waters
Craig T. Connolly,M. Bayani Cardenas,Greta A. Burkart,Robert G. M. Spencer,James W. McClelland +4 more
TL;DR: It is shown that water flowing through thawed soils below the tundra surface (supra-permafrost groundwater) can be a major source of dissolved organic matter (DOM) to Arctic coastal waters during the summer.
Journal ArticleDOI
Soil moisture control over autumn season methane flux, Arctic Coastal Plain of Alaska
TL;DR: In this article, an analysis of eddy covariance and chamber measurements of CH4 efflux and supporting environmental variables during the autumn season and associated beginning of soil freeze-up at a large-scale water manipulation site near Barrow, Alaska (the Biocomplexity Experiment).
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