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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003536naa a2200457 4500
001oai:DiVA.org:su-94036
003SwePub
008130924s2013 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-940362 URI
0247 a https://doi.org/10.1073/pnas.13070311102 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Feng, Xiaojuan4 aut
2451 0a Differential mobilization of terrestrial carbon pools in Eurasian Arctic river basins
264 c 2013-08-12
264 1b Proceedings of the National Academy of Sciences,c 2013
338 a print2 rdacarrier
500 a AuthorCount:10;
520 a Mobilization of Arctic permafrost carbon is expected to increase with warming-induced thawing. However, this effect is challenging to assess due to the diverse processes controlling the release of various organic carbon (OC) pools from heterogeneous Arctic landscapes. Here, by radiocarbon dating various terrestrial OC components in fluvially and coastally integrated estuarine sediments, we present a unique framework for deconvoluting the contrasting mobilization mechanisms of surface vs. deep (permafrost) carbon pools across the climosequence of the Eurasian Arctic. Vascular plant-derived lignin phenol C-14 contents reveal significant inputs of young carbon from surface sources whose delivery is dominantly controlled by river runoff. In contrast, plant wax lipids predominantly trace ancient (permafrost) OC that is preferentially mobilized from discontinuous permafrost regions, where hydrological conduits penetrate deeper into soils and thermokarst erosion occurs more frequently. Because river runoff has significantly increased across the Eurasian Arctic in recent decades, we estimate from an isotopic mixing model that, in tandem with an increased transfer of young surface carbon, the proportion of mobilized terrestrial OC accounted for by ancient carbon has increased by 3-6% between 1985 and 2004. These findings suggest that although partly masked by surface carbon export, climate change-induced mobilization of old permafrost carbon is well underway in the Arctic.
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Miljövetenskap0 (SwePub)105022 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Environmental Sciences0 (SwePub)105022 hsv//eng
653 a fluvial mobilization
653 a compound-specific C-14
653 a hydrogeographic control
7001 a Vonk, Jorien E.4 aut
7001 a van Dongen, Bart E.4 aut
7001 a Gustafsson, Örjanu Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)4 aut0 (Swepub:su)ogust
7001 a Semiletov, Igor P.4 aut
7001 a Dudarev, Oleg V.4 aut
7001 a Wang, Zhiheng4 aut
7001 a Montlucon, Daniel B.4 aut
7001 a Wacker, Lukas4 aut
7001 a Eglinton, Timothy I.4 aut
7102 a Stockholms universitetb Institutionen för tillämpad miljövetenskap (ITM)4 org
7730 t Proceedings of the National Academy of Sciences of the United States of Americad : Proceedings of the National Academy of Sciencesg 110:35, s. 14168-14173q 110:35<14168-14173x 0027-8424x 1091-6490
8564 u https://www.pnas.org/content/pnas/110/35/14168.full.pdf
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-94036
8564 8u https://doi.org/10.1073/pnas.1307031110

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