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
Citations
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Sedimentary characteristics and origin of the Late Pleistocene Ice Complex on north-east Siberian Arctic coastal lowlands and islands – A review
Lutz Schirrmeister,Viktor V. Kunitsky,Guido Grosse,Sebastian Wetterich,Hanno Meyer,Georg Schwamborn,O Babiy,Alexander Yu Derevyagin,Christine Siegert +8 more
TL;DR: The origin of Late Pleistocene ice-rich, fine-grained permafrost sequences (Ice Complex deposits) in arctic and subarctic Siberia has been in dispute for a long time as mentioned in this paper.
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Input of easily available organic C and N stimulates microbial decomposition of soil organic matter in arctic permafrost soil
Birgit Wild,Jörg Schnecker,Ricardo J. Eloy Alves,Pavel Barsukov,Jiří Bárta,Petr Čapek,Norman Gentsch,Antje Gittel,Georg Guggenberger,Nikolay Lashchinskiy,Robert Mikutta,Olga Rusalimova,Hana Šantrůčková,Olga Shibistova,Tim Urich,Margarete Watzka,Galina Zrazhevskaya,Andreas Richter +17 more
TL;DR: These findings provide a first mechanistic understanding of priming in permafrost soils and suggest that an increase in the availability of organic carbon or nitrogen, e.g., by increased plant productivity, can change the decomposition of SOM stored in deeper layers of permaf frost soils, with possible repercussions on the global climate.
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Climate change impacts on groundwater and soil temperatures in cold and temperate regions: Implications, mathematical theory, and emerging simulation tools
TL;DR: In this paper, the authors discussed the theory and development of subsurface heat transport equations for cold and temperate regions and provided analytical solutions to transient forms of the conduction equation and the conductor-advection equation with and without freezing.
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Current systematic carbon-cycle observations and the need for implementing a policy-relevant carbon observing system
P. Ciais,A. J. Dolman,Antonio Bombelli,Riley M. Duren,Anna Peregon,Peter Rayner,Charles E. Miller,Nadine Gobron,G. Kinderman,Gregg Marland,Nicolas Gruber,Frédéric Chevallier,Robert J. Andres,Gianpaolo Balsamo,Laurent Bopp,F. M. Bréon,Grégoire Broquet,Roger Dargaville,Tom J. Battin,Alberto Borges,Heinrich Bovensmann,Michael Buchwitz,J. Butler,Josep G. Canadell,Robert B. Cook,R. DeFries,Richard Engelen,Kevin R. Gurney,Christoph Heinze,Christoph Heinze,Martin Heimann,Alex Held,Matieu Henry,Beverly E. Law,Sebastiaan Luyssaert,John B. Miller,John B. Miller,T. Moriyama,C. Moulin,Ranga B. Myneni,C. Nussli,Michael Obersteiner,Dennis S. Ojima,Yude Pan,Jean-Daniel Paris,S. L. Piao,Benjamin Poulter,S. Plummer,Shaun Quegan,Peter A. Raymond,Markus Reichstein,L. Rivier,Christopher L. Sabine,David S. Schimel,Oksana Tarasova,Riccardo Valentini,Rong Wang,G. R. van der Werf,Diane Wickland,Mathew Williams,Claus Zehner +60 more
TL;DR: In this article, the authors identify the current state of carbon observations, and the needs and notional requirements for a global integrated carbon observation system that can be built in the next decade, and conclude that substantial expansion of the ground-based observation networks required to reach the high spatial resolution for CO2 and CH4 fluxes, and for carbon stocks for addressing policy-relevant objectives, and attributing flux changes to underlying processes in each region.
Journal ArticleDOI
Effects of experimental warming of air, soil and permafrost on carbon balance in Alaskan tundra
Susan M. Natali,Edward A. G. Schuur,Christian Trucco,Caitlin E. Hicks Pries,Kathryn G. Crummer,Andres F. Baron Lopez +5 more
TL;DR: The Carbon in Permafrost Experimental Heating Research (CiPEHR) project as mentioned in this paper used snow fences coupled with spring snow removal to increase deep soil temperatures and thaw depth (winter warming) and open-top chambers to increase growing season air temperatures (summer warming).
References
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