Nitrogen-rich organic soils under warm well-drained conditions are global nitrous oxide emission hotspots

Jaan Pärn (), Jos T. A. Verhoeven, Klaus Butterbach-Bahl, Nancy B. Dise, Sami Ullah, Anto Aasa, Sergey Egorov, Mikk Espenberg, Järvi Järveoja, Jyrki Jauhiainen, Kuno Kasak, Leif Klemedtsson, Ain Kull, Fatima Laggoun-Défarge, Elena D. Lapshina, Annalea Lohila, Krista Lõhmus, Martin Maddison, William J. Mitsch, Christoph Müller, Ülo Niinemets, Bruce Osborne, Taavi Pae, Jüri-Ott Salm, Fotis Sgouridis, Kristina Sohar, Kaido Soosaar, Kathryn Storey, Alar Teemusk, Moses M. Tenywa, Julien Tournebize, Jaak Truu, Gert Veber, Jorge A. Villa, Seint Sann Zaw and Ülo Mander
Additional contact information
Jaan Pärn: University of Tartu
Jos T. A. Verhoeven: Utrecht University
Klaus Butterbach-Bahl: Karlsruhe Institute of Technology
Nancy B. Dise: Centre for Ecology and Hydrology
Sami Ullah: University of Birmingham
Anto Aasa: University of Tartu
Sergey Egorov: University of Tartu
Mikk Espenberg: University of Tartu
Järvi Järveoja: University of Tartu
Jyrki Jauhiainen: Natural Resources Institute Finland (Luke)
Kuno Kasak: University of Tartu
Leif Klemedtsson: University of Gothenburg
Ain Kull: University of Tartu
Fatima Laggoun-Défarge: National Center for Scientific Research (CNRS) and University of Orléans
Elena D. Lapshina: Yugra State University
Annalea Lohila: Finnish Meteorological Institute
Krista Lõhmus: University of Tartu
Martin Maddison: University of Tartu
William J. Mitsch: Florida Gulf Coast University
Christoph Müller: Justus Liebig University Giessen
Ülo Niinemets: Estonian University of Life Sciences
Bruce Osborne: UCD Earth Institute
Taavi Pae: University of Tartu
Jüri-Ott Salm: Estonian Fund for Nature
Fotis Sgouridis: University of Bristol
Kristina Sohar: University of Tartu
Kaido Soosaar: University of Tartu
Kathryn Storey: Tasmanian Government
Alar Teemusk: University of Tartu
Moses M. Tenywa: Makerere University
Julien Tournebize: National Research Institute of Science and Technology for Environment and Agriculture (IRSTEA)
Jaak Truu: University of Tartu
Gert Veber: University of Tartu
Jorge A. Villa: Corporacion Universitaria Lasallista
Seint Sann Zaw: Forest Resource Environment Development and Conservation Association
Ülo Mander: University of Tartu

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract Nitrous oxide (N2O) is a powerful greenhouse gas and the main driver of stratospheric ozone depletion. Since soils are the largest source of N2O, predicting soil response to changes in climate or land use is central to understanding and managing N2O. Here we find that N2O flux can be predicted by models incorporating soil nitrate concentration (NO3−), water content and temperature using a global field survey of N2O emissions and potential driving factors across a wide range of organic soils. N2O emissions increase with NO3− and follow a bell-shaped distribution with water content. Combining the two functions explains 72% of N2O emission from all organic soils. Above 5 mg NO3−-N kg−1, either draining wet soils or irrigating well-drained soils increases N2O emission by orders of magnitude. As soil temperature together with NO3− explains 69% of N2O emission, tropical wetlands should be a priority for N2O management.

Date: 2018
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DOI: 10.1038/s41467-018-03540-1

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