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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Organic carbon and total nitrogen stocks in soils of the Lena River Delta
TL;DR: In this paper, the authors estimate that the Lena River Delta holds more than half of the entire soil organic carbon (SOC) mass stored in the seven major deltas in the northern permafrost regions.
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Annual patterns and budget of CO2 flux in an Arctic tussock tundra ecosystem
TL;DR: In this paper, a year-round study of CO2 fluxes in an Alaskan Arctic tussock tundra ecosystem, and key environmental controls on these fluxes vary by season is presented.
Distinct microbial communities associated with buried soils in the Siberian tundra
Antje Gittel,Jiří Bárta,Iva Kohoutová,Robert Mikutta,Sarah M. Owens,Jack A. Gilbert,Jörg Schnecker,Birgit Wild,Bjarte Hannisdal,Joeran Maerz,Nikolay Lashchinskiy,Petr Čapek,Hana Šantrůčková,Norman Gentsch,Olga Shibistova,Georg Guggenberger,Andreas Richter,Vigdis Torsvik,Christa Schleper,Tim Urich +19 more
TL;DR: In this article, the microbial community structure in cryoturbated soils from nine soil profiles in the northeastern Siberian tundra using high-throughput sequencing and quantification of bacterial, archaeal and fungal marker genes.
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Insights and issues with simulating terrestrial DOC loading of Arctic river networks
David W. Kicklighter,Daniel J. Hayes,James W. McClelland,Bruce J. Peterson,A. David McGuire,Jerry M. Melillo +5 more
TL;DR: Improvements in simulating terrestrial DOC loading to pan-Arctic rivers in the future will require better information on the production and consumption of DOC within the soil profile, the transfer of DOC from land to headwater streams, the spatial distribution of precipitation and its temporal trends, carbon dynamics of larch-dominated ecosystems in eastern Siberia, and the role of industrial organic effluents on carbon budgets of rivers in western Russia.
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The Chemical Ecology of Soil Organic Matter Molecular Constituents
TL;DR: The goal of this review is to highlight the methods used to characterize soil OM structure, source, and degradation that have enabled precise observations of OM and associated ecological shifts.
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