Organic carbon remobilized from thawing permafrost is resequestered by reactive iron on the Eurasian Arctic Shelf

Organic carbon remobilized from thawing permafrost is resequestered by reactive iron on the Eurasian Arctic Shelf

Bibliographic Details
Parent link:	Geophysical Research Letters Vol. 42, iss. 19.— 2015.— [P. 8122-8130]
Corporate Author:	Национальный исследовательский Томский политехнический университет (ТПУ) Институт природных ресурсов (ИПР) Кафедра геологии и разведки полезных ископаемых (ГРПИ)
Other Authors:	Salvado J. A. Joan, Tesi T., Andersson A., Ingri J., Dudarev O. V. Oleg Viktorovich, Semiletov I. P. Igor Petrovich, Gustafsson O.
Summary:	Title screen Given the potential for permafrost carbon (PF/C)-climate feedbacks in the Siberian-Arctic land-ocean system, there is a need for understanding the fate of thawed-out PF/C. Here we show that the sequestration of OC by reactive iron (OC-Fe) ranges between 0.5 and 22% on the Eurasian Arctic Shelf, with higher values in the Kara Sea (KS) (18 ± 6%) and the Laptev Sea (LS) (14 ± 4%). The Δ14C/δ13C signatures of the OC-Fe are substantially older and more terrestrial than the bulk sediment OC in the LS but younger and more dominated by marine plankton sources in the East Siberian Sea (ESS). Statistical source apportionment modeling reveal that reactive iron phases resequestered 15 ± 5% of thawing PF/C in the LS and 6.4 ± 5% in the ESS, derived from both coastal erosion of ice complex deposit and thawing topsoil. This Fe-associated trap of PF/C constitutes a reduction of the degradation/outgassing and thus also an attenuation of the PF/C-climate feedback. Режим доступа: по договору с организацией-держателем ресурса
Language:	English
Published:	2015
Subjects:	электронный ресурс труды учёных ТПУ
Online Access:	http://dx.doi.org/10.1002/2015GL066058
Format:	Electronic Book Chapter
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=645550

Internet

http://dx.doi.org/10.1002/2015GL066058