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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Spatial distribution of soil organic carbon in northwest Greenland and underestimates of high Arctic carbon stores
TL;DR: In this paper, a detailed study of soil organic carbon (SOC) content by depth in 55 soil pits in a high Arctic ecosystem of northwest Greenland was performed, and the amount of SOC in the various ecosystems was mapped using a correlation of SOC with high-resolution ASTER satellite imagery and the normalized difference vegetation index (NDVI) classes from the Circumpolar Arctic Vegetation Map.
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Effect of climate change on delivery and degradation of lipid biomarkers in a Holocene peat sequence in the Eastern European Russian Arctic
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High arctic heath soil respiration and biogeochemical dynamics during summer and autumn freeze-in – effects of long-term enhanced water and nutrient supply
TL;DR: Autumn soil microbial activity seems tightly linked to growing season plant production through plant-associated carbon pools, and no change in soil organic matter content after 14 years of environmental manipulations is observed, suggesting high ecosystem resistance to environmental changes.
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Modern to millennium-old greenhouse gases emitted from ponds and lakes of the Eastern Canadian Arctic (Bylot Island, Nunavut)
Frédéric Bouchard,Frédéric Bouchard,Frédéric Bouchard,Isabelle Laurion,Isabelle Laurion,V. Prėskienis,V. Prėskienis,Daniel Fortier,Daniel Fortier,Xiaomei Xu,Michael J. Whiticar +10 more
TL;DR: In this paper, the authors report on GHG ages and emission rates from aquatic systems located on Bylot Island, in the continuous permafrost zone of the Eastern Canadian Arctic.
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Effects of warming and clipping on ecosystem carbon fluxes across two hydrologically contrasting years in an alpine meadow of the Qinghai-Tibet Plateau
TL;DR: The results suggest the response of C fluxes to warming and clipping depends on hydrological variations, and highlight the importance of changes in soil moisture in mediating the responses of ecosystem C fluxe to climate warming in an alpine meadow ecosystem.
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