Pärn, J and Verhoeven, JTA and Butterbach-Bahl, K and Dise, NB and Ullah, S and Aasa, A and Egorov, S and Espenberg, M and Järveoja, J and Jauhiainen, J and Kasak, K and Klemedtsson, L and Kull, A and Laggoun-Défarge, F and Lapshina, ED and Lohila, A and Lõhmus, K and Maddison, M and Mitsch, WJ and Müller, C and Niinemets, Ü and Osborne, B and Pae, T and Salm, J-O and Sgouridis, F and Sohar, K and Soosaar, K and Storey, K and Teemusk, A and Tenywa, MM and Tournebize, J and Truu, J and Veber, G and Villa, JA and Zaw, SS and Mander, Ü (2018) Nitrogen-rich organic soils under warm well-drained conditions are global nitrous oxide emission hotspots. Nature Communications, 9 (1). 1135 -1135. ISSN 2041-1723

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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.

Item Type: Article
Additional Information: This is the final published version of the article (version of record). It first appeared online via Nature at http://dx.doi.org/10.1038/s41467-018-03540-1 - please refer to any applicable terms of use of the publisher.
Subjects: G Geography. Anthropology. Recreation > GB Physical geography
Divisions: Faculty of Natural Sciences > School of Geography, Geology and the Environment
Related URLs:
Depositing User: Symplectic
Date Deposited: 05 Apr 2018 13:42
Last Modified: 05 Apr 2018 13:48
URI: http://eprints.keele.ac.uk/id/eprint/4720

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