TY  - SER
AU  - Martens,Jannik
AU  - Wild,Birgit
AU  - Semiletov,Igor P.
AU  - Dudarev,Oleg V.
AU  - Gustafsson,Örjan
TI  - Circum-Arctic release of terrestrial carbon varies between regions and sources
KW  - наземный углерод
KW  - циркумарктический выброс
KW  - Циркумарктическая база данных углеродных отложений
KW  - почвы
KW  - вечная мерзлота
KW  - Арктика
KW  - статьи в журналах
N1  - Библиогр.: 59 назв
N2  - 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
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000996463
ER  -