Deglacial mobilization of pre-aged terrestrial carbon from degrading permafrost

Maria Winterfeld, Gesine Mollenhauer, Wolf Dummann, Peter Köhler, Lester Lembke-Jene, Vera D. Meyer, Jens Hefter, Cameron McIntyre, Lukas Wacker, Ulla Kokfelt, Ralf Tiedemann

Publikation: Bidrag til tidsskriftArtikelForskningpeer review

49 Citationer (Scopus)

Resumé

The mobilization of glacial permafrost carbon during the last glacial–interglacial transition has been suggested by indirect evidence to be an additional and significant source of greenhouse gases to the atmosphere, especially at times of rapid sea-level rise. Here we present the first direct evidence for the release of ancient carbon from degrading permafrost in East Asia during the last 17 kyrs, using biomarkers and radiocarbon dating of terrigenous material found in two sediment cores from the Okhotsk Sea. Upscaling our results to the whole Arctic shelf area, we show by carbon cycle simulations that deglacial permafrost-carbon release through sea-level rise likely contributed significantly to the changes in atmospheric CO2 around 14.6 and 11.5 kyrs BP.

OriginalsprogEngelsk
Artikelnummer3666
Antal sider12
TidsskriftNature Communications
Vol/bind9
Udgave nummer1
DOI
StatusUdgivet - 1 dec. 2018

Programområde

  • Programområde 5: Natur og klima

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