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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A Large and Persistent Carbon Sink in the World’s Forests
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TL;DR: In this article, a new generation of experiments and soil carbon models were proposed to predict the SOM response to global warming, and they showed that molecular structure alone alone does not control SOM stability.
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Edward A. G. Schuur,A. D. McGuire,Christina Schädel,Christina Schädel,Guido Grosse,Jennifer W. Harden,Daniel J. Hayes,Gustaf Hugelius,Charles D. Koven,Peter Kuhry,David M. Lawrence,Susan M. Natali,David Olefeldt,Vladimir E. Romanovsky,Kevin Schaefer,Merritt R. Turetsky,Claire C. Treat,Jorien E. Vonk +17 more
TL;DR: In this paper, the authors find that current evidence suggests a gradual and prolonged release of greenhouse gas emissions in a warming climate and present a research strategy with which to target poorly understood aspects of permafrost carbon dynamics.
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Deep soil organic matter—a key but poorly understood component of terrestrial C cycle
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Journal ArticleDOI
Estimated stocks of circumpolar permafrost carbon with quantified uncertainty ranges and identified data gaps
Gustaf Hugelius,Jens Strauss,Sebastian Zubrzycki,Jennifer W. Harden,Edward A. G. Schuur,Edward A. G. Schuur,Chien-Lu Ping,Lutz Schirrmeister,Guido Grosse,Gary J. Michaelson,Charles D. Koven,Jonathan A. O'Donnell,Bo Elberling,Umakant Mishra,Philip Camill,Zicheng Yu,Juri Palmtag,Peter Kuhry +17 more
TL;DR: In this article, the authors presented revised estimates of permafrost organic carbon stocks, including quantitative uncertainty estimates, in the 0-3 m depth range in soils as well as for sediments deeper than 3 m in deltaic deposits of major rivers and in the Yedoma region of Siberia and Alaska.
References
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Journal ArticleDOI
CO2 and CH4 exchanges between land ecosystems and the atmosphere in northern high latitudes over the 21st century
Qianlai Zhuang,Jerry M. Melillo,Marcus C. Sarofim,David W. Kicklighter,A. David McGuire,Benjamin S. Felzer,Andrei P. Sokolov,Ronald G. Prinn,Paul A. Steudler,Shaomin Hu +9 more
TL;DR: In this article, a process-based model was used to estimate the budget of CO2 and CH4 of the region for current climate conditions and for future scenarios by considering effects of permafrost dynamics, CO2 fertilization of photosynthesis and fire.
Department of Botany.
TL;DR: I have great pleasure in forwarding herewith three co leg of the thesis entitled MPathological investi gations concerning decay of wood-tissue by certain fungi with reference to Chorea robust a Gaertn.
Journal ArticleDOI
A high-resolution GIS-based inventory of the west Siberian peat carbon pool
Yongwei Sheng,Laurence C. Smith,Glen M. MacDonald,K.V. Kremenetski,K.V. Kremenetski,Karen E. Frey,Andrei A. Velichko,Mary Lee,David W. Beilman,Peter Dubinin +9 more
TL;DR: In this paper, a wide array of data was compiled into a geographic information system (GIS) to create a high-resolution, spatially explicit digital inventory of all WSL peatlands and their associated physical properties.
Book ChapterDOI
Saturation of the terrestrial carbon sink
Josep G. Canadell,Diane E. Pataki,Roger Gifford,Richard A. Houghton,Yiqi Luo,Michael R. Raupach,Pete Smith,Will Steffen +7 more
Journal ArticleDOI
Importance of Cryoturbation in Redistributing Organic Carbon in Permafrost-Affected Soils
TL;DR: In this article, the authors examined the amount of soil organic carbon incorporated by cryoturbation into the active layer and near-surface permafrost of Turbels from northern Alaska.
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