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Global Nitrous Oxide Emissions From Pasturelands and Rangelands: Magnitude, Spatiotemporal Patterns, and Attribution


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dc.contributorH. Tian, tianhan@auburn.eduen_US
dc.creatorDangal, Shree R. S.
dc.creatorTian, Hanqin
dc.creatorXu, Rongting
dc.creatorChang, Jinfeng
dc.creatorCanadell, Josep G.
dc.creatorCiais, Philippe
dc.creatorPan, Shufen
dc.creatorYang, Jia
dc.creatorZhang, Bowen
dc.date.accessioned2020-04-01T18:18:48Z
dc.date.available2020-04-01T18:18:48Z
dc.date.created2019-02
dc.identifier10.1029/2018GB006091en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GB006091en_US
dc.identifier.urihttp://hdl.handle.net/11200/49779
dc.description.abstractThe application of manure and mineral nitrogen (N) fertilizer, and livestock excreta deposition are the main drivers of nitrous oxide (N2O) emissions in agricultural systems. However, the magnitude and spatiotemporal variations of N2O emissions due to different management practices (excreta deposition and manure/fertilizer application) from grassland ecosystems remain unclear. In this study, we used the Dynamic Land Ecosystem Model to simulate the spatiotemporal variation in global N2O emissions and their attribution to different sources from both intensively managed (pasturelands) and extensively managed (rangelands) grasslands during 1961-2014. Over the study period, pasturelands and rangelands experienced a significant increase in N2O emissions from 1.74 Tg N2O-N in 1961 to 3.11 Tg N2O-N in 2014 (p < 0.05). Globally, pasturelands and rangelands were responsible for 54% (2.2 Tg N2O-N) of the total agricultural N2O emissions (4.1 Tg N2O-N) in 2006. Natural and anthropogenic sources contributed 26% (0.64 Tg N2O-N/year) and 74% (1.78 Tg N2O-N/year) of the net emissions, respectively. Across different biomes, pasturelands (i.e., C3 and C4) were the single largest contributor to N2O fluxes, accounting for 86% of the net global emissions from grasslands. Among different sources, livestock excreta deposition contributed 54% of the net emissions, followed by manure N (13%) and mineral N (7%) application. Regionally, southern Asia contributed 38% of the total emissions, followed by Europe (29%) and North America (16%). Our modeling study demonstrates that livestock excreta deposition and manure/fertilizer application have dramatically altered the N cycle in pasturelands, with a substantial impact on the climate system.en_US
dc.formatPDFen_US
dc.publisherAMER GEOPHYSICAL UNIONen_US
dc.relation.ispartofGLOBAL BIOGEOCHEMICAL CYCLESen_US
dc.relation.ispartofseries0886-6236en_US
dc.rights©American Geophysical Union 2019. This is this the version of record co-published by the American Geophysical Union and John Wiley & Sons, Inc. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Item should be cited as: Dangal, S. R., Tian, H., Xu, R., Chang, J., Canadell, J. G., Ciais, P., ... & Zhang, B. (2019). Global nitrous oxide emissions from pasturelands and rangelands: magnitude, spatiotemporal patterns, and attribution. Global Biogeochemical Cycles, 33(2), 200-222.en_US
dc.subjectcarbon storageen_US
dc.subjectfertilizer nitrogenen_US
dc.subjectgreenhouse-gas balanceen_US
dc.subjectlivestock productionen_US
dc.subjectn-fertilizeren_US
dc.subjectn2o emissionsen_US
dc.subjectsoil organic-matteren_US
dc.subjectspecies compositionen_US
dc.subjectterrestrial ecosystemsen_US
dc.titleGlobal Nitrous Oxide Emissions From Pasturelands and Rangelands: Magnitude, Spatiotemporal Patterns, and Attributionen_US
dc.typeCollectionen_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume33en_US
dc.citation.issue2en_US
dc.citation.spage200en_US
dc.citation.epage222en_US
dc.description.statusPublisheden_US
dc.description.peerreviewYesen_US
dc.creator.orcid0000-0002-1806-4091en_US
dc.creator.orcid0000-0001-7920-1427en_US

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