Stabilization of mineral-associated organic carbon in Pleistocene permafrost

Jannik Martens (), Carsten W. Mueller, Prachi Joshi, Christoph Rosinger, Markus Maisch, Andreas Kappler, Michael Bonkowski, Georg Schwamborn, Lutz Schirrmeister and Janet Rethemeyer ()
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Jannik Martens: University of Cologne
Carsten W. Mueller: Technical University of Munich
Prachi Joshi: University of Tübingen
Christoph Rosinger: University of Cologne
Markus Maisch: University of Tübingen
Andreas Kappler: University of Tübingen
Michael Bonkowski: University of Cologne
Georg Schwamborn: Permafrost Research Section
Lutz Schirrmeister: Permafrost Research Section
Janet Rethemeyer: University of Cologne

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Ice-rich Pleistocene-age permafrost is particularly vulnerable to rapid thaw, which may quickly expose a large pool of sedimentary organic matter (OM) to microbial degradation and lead to emissions of climate-sensitive greenhouse gases. Protective physico-chemical mechanisms may, however, restrict microbial accessibility and reduce OM decomposition; mechanisms that may be influenced by changing environmental conditions during sediment deposition. Here we study different OM fractions in Siberian permafrost deposited during colder and warmer periods of the past 55,000 years. Among known stabilization mechanisms, the occlusion of OM in aggregates is of minor importance, while 33-74% of the organic carbon is associated with small,

Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-37766-5

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DOI: 10.1038/s41467-023-37766-5

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