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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Fate of terrigenous organic matter across the Laptev Sea from the mouth of the Lena River to the deep sea of the Arctic interior
Lisa Bröder,Tommaso Tesi,Tommaso Tesi,Joan A. Salvadó,Igor Semiletov,Igor Semiletov,Oleg V. Dudarev,Örjan Gustafsson +7 more
TL;DR: In this article, the fate of terrigenous organic carbon (TerrOC) in the Arctic marine environment by exploring how it changes in concentration, composition and degradation status across the wide Laptev Sea shelf.
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Identification of unrecognized tundra fire events on the north slope of Alaska
Benjamin M. Jones,Amy L. Breen,Benjamin V. Gaglioti,Benjamin V. Gaglioti,Daniel H. Mann,Adrian V. Rocha,Guido Grosse,Christopher D. Arp,Michael L. Kunz,Donald A. Walker +9 more
TL;DR: In this article, the authors studied vegetation and permafrost-terrain characteristics along a chronosequence of tundra burn sites from AD 1977, 1993, and 2007 on the North Slope of Alaska.
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Organic Carbon Pools and Genesis of Alpine Soils with Permafrost: A Review
TL;DR: In this paper, a global database of 41 sites and 312 pedons was used to investigate the soil organic carbon (SOC) of mountain soils with permafrost and found that the concentration of organic carbon is concentrated in the upper 30 to 40 cm, with profile density averaging 15.2 ± 1.3 kg m −2 (range = <1.0 to 88.3kg m −1 ).
Journal ArticleDOI
Tundra photosynthesis captured by satellite‐observed solar‐induced chlorophyll fluorescence
K. A. Luus,Roisin Commane,Nicholas C. Parazoo,J. S. Benmergui,Eugénie S. Euskirchen,Christian Frankenberg,Joanna Joiner,Jakob Lindaas,Jakob Lindaas,Charles E. Miller,Walter C. Oechel,Walter C. Oechel,Donatella Zona,Donatella Zona,S. C. Wofsy,John C. Lin +15 more
TL;DR: In this paper, satellite observations of solar-induced chlorophyll fluorescence (SIF) provide a more direct proxy for photosynthesis, instead of EVI, for modeling the seasonal cycle of tundra photosynthesis.
Journal ArticleDOI
Linking thaw depth with soil moisture and plant community composition: effects of permafrost degradation on alpine ecosystems on the Qinghai-Tibet Plateau
TL;DR: In this paper, the authors analyzed the changes in species composition and water-use efficiency in response to permafrost degradation on the Qinghai-Tibetan Plateau, and found that the dominant species shifted from Cyperaceae in alpine meadow to mesoxerophytes in al-pine steppe before finally shifting to xerophyte in al Alpine desert steppe.
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