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A globally relevant stock of soil nitrogen in the Yedoma permafrost domain

verfasst von
Jens Strauss, Christina Biasi, Tina Sanders, Benjamin W Abbott, Thomas Schneider von Deimling, Carolina Voigt, Matthias Winkel, Maija E Marushchak, Dan Kou, Matthias Fuchs, Marcus A Horn, Loeka L Jongejans, Susanne Liebner, Jan Nitzbon, Lutz Schirrmeister, Katey Walter Anthony, Yuanhe Yang, Sebastian Zubrzycki, Sebastian Laboor, Claire Treat, Guido Grosse
Abstract

Nitrogen regulates multiple aspects of the permafrost climate feedback, including plant growth, organic matter decomposition, and the production of the potent greenhouse gas nitrous oxide. Despite its importance, current estimates of permafrost nitrogen are highly uncertain. Here, we compiled a dataset of >2000 samples to quantify nitrogen stocks in the Yedoma domain, a region with organic-rich permafrost that contains ~25% of all permafrost carbon. We estimate that the Yedoma domain contains 41.2 gigatons of nitrogen down to ~20 metre for the deepest unit, which increases the previous estimate for the entire permafrost zone by ~46%. Approximately 90% of this nitrogen (37 gigatons) is stored in permafrost and therefore currently immobile and frozen. Here, we show that of this amount, ¾ is stored >3 metre depth, but if partially mobilised by thaw, this large nitrogen pool could have continental-scale consequences for soil and aquatic biogeochemistry and global-scale consequences for the permafrost feedback.

Organisationseinheit(en)
Institut für Mikrobiologie
Externe Organisation(en)
Alfred-Wegener-Institut (AWI) Helmholtz-Zentrum für Polar- und Meeresforschung
University of Eastern Finland
Brigham Young University
Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum
University of Alaska Fairbanks
Chinese Academy of Sciences
Centrum für Erdsystemforschung und Nachhaltigkeit (CEN)
Helmholtz-Zentrum hereon GmbH
Typ
Artikel
Journal
Nature Communications
Band
13
ISSN
2041-1723
Publikationsdatum
14.10.2022
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Allgemein, Physik und Astronomie (insg.), Chemie (insg.), Biochemie, Genetik und Molekularbiologie (insg.)
Ziele für nachhaltige Entwicklung
SDG 13 – Klimaschutzmaßnahmen
Elektronische Version(en)
https://doi.org/10.1038/s41467-022-33794-9 (Zugang: Offen)
https://doi.org/10.15488/13978 (Zugang: Offen)