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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Tamm Review: Influence of forest management activities on soil organic carbon stocks: A knowledge synthesis
Mathias Mayer,Cindy E. Prescott,Wafa E.A. Abaker,Laurent Augusto,Lauric Cécillon,Gabriel W.D. Ferreira,Jason James,Robert Jandl,Klaus Katzensteiner,Jean-Paul Laclau,Jérôme Laganière,Yann Nouvellon,David Paré,John A. Stanturf,Elena Vanguelova,Lars Vesterdal +15 more
TL;DR: In this article, the authors synthesize current evidence regarding the influences of 13 common forest management practices on forest soil C stocks, and identify existing gaps in knowledge and suggest research to address the gaps.
Journal ArticleDOI
The Northern Circumpolar Soil Carbon Database: spatially distributed datasets of soil coverage and soil carbon storage in the northern permafrost regions
TL;DR: The Northern Circumpolar Soil Carbon Database (NCSCD) as discussed by the authors was developed to quantify the organic carbon stocks in the circumpolar permafrost region (18.7 × 106 km2).
Journal ArticleDOI
Controls on the composition and lability of dissolved organic matter in Siberia's Kolyma River basin
Paul J. Mann,Anna Davydova,Nikita Zimov,Robert G. M. Spencer,Sergey Davydov,Ekaterina Bulygina,Sergei Zimov,Robert M. Holmes +7 more
TL;DR: In this paper, the authors examined DOC concentration and the composition of dissolved organic matter (DOM) across the hydrograph in Siberia's Kolyma River, with a particular focus on the spring freshet period when the majority of the annual DOC load is exported.
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Climate change prediction: Erring on the side of least drama?
TL;DR: The authors argue that climate scientists are biased not toward alarmism but rather the reverse: toward cautious estimates, where they define caution as erring on the side of less rather than more alarming predictions.
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Predicted responses of arctic and alpine ecosystems to altered seasonality under climate change
Jessica G. Ernakovich,Kelly A. Hopping,Aaron B. Berdanier,Rodney T. Simpson,Emily Kachergis,Heidi Steltzer,Matthew D. Wallenstein +6 more
TL;DR: It is found that although arctic and alpine ecosystems appear similar under historical climate conditions, climate change will lead to divergent responses, particularly in the spring and fall shoulder seasons, affecting community structure, biotic interactions, and biogeochemistry.
References
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