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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The contribution of Fe(III) and humic acid reduction to ecosystem respiration in drained thaw lake basins of the Arctic Coastal Plain
TL;DR: In this paper, the authors studied four DTLBs across an age gradient, comparing seasonal changes in the oxidation state of dissolved and extractable Fe pools and the estimated contribution of Fe reduction to ecosystem respiration.
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Soil organic carbon pools and stocks in permafrost-affected soils on the tibetan plateau.
TL;DR: Permafrost-affected soils in discontinuous permafrost environments are susceptible to soil moisture changes due to alterations in quantity and seasonal distribution of precipitation, increasing temperature and therefore evaporation.
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Permafrost thaw and climate warming may decrease the CO2, carbon, and metal concentration in peat soil waters of the Western Siberia Lowland.
T. V. Raudina,Sergey V. Loiko,A. G. Lim,R. M. Manasypov,Liudmila S. Shirokova,G.I. Istigechev,D.M. Kuzmina,S.P. Kulizhsky,Sergey N. Vorobyev,Oleg S. Pokrovsky +9 more
TL;DR: Within the "substituting space for time" climate change scenario and northward shift of the permafrost boundary, the results suggest that CO2, DOC, and many major and trace elements will decrease their concentration in soil supra-permafrost waters at the boundary between thaw and frozen layers.
ReportDOI
Chapter 2 : Our Changing Climate. Impacts, Risks, and Adaptation in the United States: The Fourth National Climate Assessment, Volume II
Katharine Hayhoe,Donald J. Wuebbles,David R. Easterling,David W. Fahey,Sarah J. Doherty,James P. Kossin,William Sweet,Russell S. Vose,Michael Wehner +8 more
TL;DR: Hayhoe, Katharine; Wuebbles, Donald J; Easterling, David R; Fahey, David W; Doherty, Sarah; Kossin, James P; Sweet, William V; Vose, Russell S; Wehner, Michael F.
Journal ArticleDOI
Estimating the carbon balance of central Siberia using a landscape‐ecosystem approach, atmospheric inversion and Dynamic Global Vegetation Models
Shaun Quegan,Christian Beer,Anatoly Shvidenko,Ian McCallum,Itsuki C. Handoh,Philippe Peylin,Christian Rödenbeck,Wolfgang Lucht,Wolfgang Lucht,Sten Nilsson,C.C. Schmullius +10 more
TL;DR: This paper presented five independent estimates of the contemporary carbon balance of central Siberia using three different methodologies: a landscape-ecosystem approach (LEA) that amalgamates comprehensive vegetation, soil, hydrological and morphological information into a Geographical Information System, linked to regression-based estimates of carbon flux; two dynamic global vegetation models (DGVMs); and two atmospheric inversions.
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