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

Research output: Contribution to journalArticle

  • 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
  • Ülo Mander
Original languageEnglish
Article number1135
JournalNature Communications
Volume9
DOIs
DateAccepted/In press - 21 Feb 2018
DatePublished (current) - 19 Mar 2018

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.

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    Rights statement: This is the final published version of the article (version of record). It first appeared online via Nature at https://doi.org/10.1038/s41467-018-03540-1 . Please refer to any applicable terms of use of the publisher.

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