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

doi:10.1038/s41467-018-06080-w

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

Afdeling for Glaciologi og Klima

Publikation: Bidrag til tidsskrift › Artikel › Forskning › peer review

65 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.

Originalsprog	Engelsk
Artikelnummer	3666
Antal sider	12
Tidsskrift	Nature Communications
Vol/bind	9
Udgave nummer	1
DOI	https://doi.org/10.1038/s41467-018-06080-w
Status	Udgivet - 1 dec. 2018

Programområde

Programområde 5: Natur og klima

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10.1038/s41467-018-06080-wLicens: CC BY

Citationsformater

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AU - Winterfeld, Maria

AU - Mollenhauer, Gesine

AU - Dummann, Wolf

AU - Köhler, Peter

AU - Lembke-Jene, Lester

AU - Meyer, Vera D.

AU - Hefter, Jens

AU - McIntyre, Cameron

AU - Wacker, Lukas

AU - Kokfelt, Ulla

AU - Tiedemann, Ralf

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AB - 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.

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Deglacial mobilization of pre-aged terrestrial carbon from degrading permafrost

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