Deglacial mobilization of pre-aged terrestrial carbon from degrading permafrost

Winterfeld, M. et al. (2018) Deglacial mobilization of pre-aged terrestrial carbon from degrading permafrost. Nature Communications, 9, 3666. (doi: 10.1038/s41467-018-06080-w) (PMID:30201999) (PMCID:PMC6131488)

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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.

Item Type:Articles
Additional Information:G.M. acknowledges funding from the Helmholtz Association (grant no. VH-NG-202 also supporting M.W., and funds in the W2/W3 program supporting V.M. and J.H.). L.L.-J. and R.T. acknowledge support from the Helmholtz REKLIM Initiative and BMBF grant no. 03F0704A ‘Sino-German Pacific-Arctic Experiment (SIGEPAX)’. U.K. acknowledges support from the VILLUM Foundation (grant no. 10100). This work contributes to PALMOD, the German Paleomodeling Research Project funded by BMBF.
Keywords:General biochemistry, genetics and molecular biology, general physics and astronomy, general chemistry.
Glasgow Author(s) Enlighten ID:Mcintyre, Dr Cameron
Authors: Winterfeld, M., Mollenhauer, G., Dummann, W., Köhler, P., Lembke-Jene, L., Meyer, V. D., Hefter, J., McIntyre, C., Wacker, L., Kokfelt, U., and Tiedemann, R.
College/School:College of Science and Engineering > Scottish Universities Environmental Research Centre
Journal Name:Nature Communications
Publisher:Nature Research
ISSN (Online):2041-1723
Copyright Holders:Copyright © 2018 The Authors
First Published:First published in Nature Communications 9(1):3666
Publisher Policy:Reproduced under a Creative Commons License

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