Sustainable management of riverine N2O emission baselines

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dc.contributor.authorWang, Shuo
dc.contributor.authorZhi, Wei
dc.contributor.authorLi, Shengjie
dc.contributor.authorLyu, Tao
dc.contributor.authorJi, Guodong
dc.date.accessioned2025-03-20T14:16:52Z
dc.date.available2025-03-20T14:16:52Z
dc.date.freetoread2025-03-20
dc.date.issued2025-02-01
dc.date.pubOnline2024-12-11
dc.description.abstractThe riverine N2O fluxes are assumed to linearly increase with nitrate loading. However, this linear relationship with a uniform EF5r is poorly constrained, which impedes the N2O estimation and mitigation. Our meta-analysis discovered a universal N2O emission baseline (EF5r = k/[NO3−], k = 0.02) for natural rivers. Anthropogenic impacts caused an overall increase in baselines and the emergence of hotspots, which constitute two typical patterns of anthropogenic sources. The k values of agricultural and urban rivers increased to 0.09 and 0.05, respectively, with 11% and 14% of points becoming N2O hotspots. Priority control of organic and NH4+ pollution could eliminate hotspots and reduce emissions by 51.6% and 63.7%, respectively. Further restoration of baseline emissions on nitrate removal is a long-term challenge considering population growth and declining unit benefits (ΔN-N2O/N-NO3−). The discovery of EF lines emphasized the importance of targeting hotspots and managing baseline emissions sustainably to balance social and environmental benefits.
dc.description.journalNameNational Science Review
dc.description.sponsorshipNational Natural Science Foundation of China
dc.description.sponsorshipThis work was supported by the Key Projects of the Joint Fund of the National Natural Science Foundation of China (U22A20557), the Autonomous Region Collaborative Innovation Center for Integrated Management of Water Resources and Water Environment in the Inner Mongolia Reaches of the Yellow River, and the National Natural Science Foundation of China (52379084).
dc.format.mediumElectronic-eCollection
dc.identifier.citationWang S, Zhi W, Li S, et al., (2025) Sustainable management of riverine N2O emission baselines. National Science Review, Volume 12, Issue 2, February 2025, Article number nwae458
dc.identifier.eissn2053-714X
dc.identifier.elementsID561001
dc.identifier.issn2095-5138
dc.identifier.issueNo2
dc.identifier.paperNonwae458
dc.identifier.urihttps://doi.org/10.1093/nsr/nwae458
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/23625
dc.identifier.volumeNo12
dc.languageEnglish
dc.language.isoen
dc.publisherOxford University Press (OUP)
dc.publisher.urihttps://academic.oup.com/nsr/article/12/2/nwae458/7921627
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectnitrous oxide
dc.subjectemission factor
dc.subjecthotspots
dc.subjectsustainable
dc.subjectgreenhouse gases
dc.subject41 Environmental Sciences
dc.subject4104 Environmental Management
dc.titleSustainable management of riverine N2O emission baselines
dc.typeArticle
dc.type.subtypeJournal Article
dcterms.dateAccepted2024-12-10

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