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Circum-Arctic relea...
Circum-Arctic release of terrestrial carbon varies between regions and sources
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- Martens, Jannik, 1991- (author)
- Stockholms universitet,Institutionen för miljövetenskap,Columbia University, USA
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- Wild, Birgit (author)
- Stockholms universitet,Institutionen för miljövetenskap
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Semiletov, Igor (author)
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Dudarev, Oleg V. (author)
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- Gustafsson, Örjan (author)
- Stockholms universitet,Institutionen för miljövetenskap
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(creator_code:org_t)
- 2022-10-04
- 2022
- English.
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In: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 13
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Arctic change is expected to destabilize terrestrial carbon (terrOC) in soils and permafrost, leading to fluvial release, greenhouse gas emission and climate feedback. However, landscape heterogeneity and location-specific observations complicate large-scale assessments of terrOC mobilization. Here we reveal differences in terrOC release, deduced from the Circum-Arctic Sediment Carbon Database (CASCADE) using source-diagnostic (δ13C-Δ14C) and carbon accumulation data. The results show five-times larger terrOC release from the Eurasian than from the American Arctic. Most of the circum-Arctic terrOC originates from near-surface soils (61%); 30% stems from Pleistocene-age permafrost. TerrOC translocation, relative to land-based terrOC stocks, varies by a factor of five between circum-Arctic regions. Shelf seas with higher relative terrOC translocation follow the spatial pattern of recent Arctic warming, while such with lower translocation reflect long-distance lateral transport with efficient remineralization of terrOC. This study provides a receptor-based perspective for how terrOC release varies across the circum-Arctic.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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