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

Pärn, Jaan; Verhoeven, Jos T.A.; Butterbach-Bahl, Klaus; Dise, Nancy B.; Ullah, Sami; Aasa, Anto; Egorov, Sergey; Espenberg, Mikk; Järveoja, Järvi; Jauhiainen, Jyrki; Kasak, Kuno; Klemedtsson, Leif; Kull, Ain; Laggoun-Défarge, Fatima; Lapshina, Elena D.; Lohila, Annalea; Lõhmus, Krista; Maddison, Martin; Mitsch, William J.; Müller, Christoph; Niinemets, Ülo; Osborne, Bruce; Pae, Taavi; Salm, Jüri-Ott; Sgouridis, Fotis; Sohar, Kristina; Soosaar, Kaido; Storey, Kathryn; Teemusk, Alar; Tenywa, Moses M.; Tournebize, Julien; Truu, Jaak; Veber, Gert; Villa, Jorge A.; Zaw, Seint Sann; Mander, Ülo. 2018 Nitrogen-rich organic soils under warm well-drained conditions are global nitrous oxide emission hotspots. Nature Communications, 9, 1135. 8, pp. https://doi.org/10.1038/s41467-018-03540-1

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Abstract/Summary

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.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1038/s41467-018-03540-1
UKCEH and CEH Sections/Science Areas:	Atmospheric Chemistry and Effects (Science Area 2017-)
ISSN:	2041-1723
Additional Information. Not used in RCUK Gateway to Research.:	Open Access paper - full text available via Official URL link.
Additional Keywords:	element cycles
NORA Subject Terms:	Agriculture and Soil Science
Date made live:	04 Apr 2018 13:40 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/519738

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