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Methane emissions from global rice fields: Magnitude, spatiotemporal patterns, and environmental controls


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dc.contributorHanqin Tian, tianhan@auburn.eduen_US
dc.creatorZhang, Bowen
dc.creatorTian, Hanqin
dc.creatorRen, Wei
dc.creatorTao, Bo
dc.creatorLu, Chaoqun
dc.creatorYang, Jia
dc.creatorBanger, Kamaljit
dc.creatorPan, Shufen
dc.date.accessioned2020-04-02T03:51:18Z
dc.date.available2020-04-02T03:51:18Z
dc.date.created2016-09
dc.identifier10.1002/2016GB005381en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016GB005381en_US
dc.identifier.urihttp://hdl.handle.net/11200/49781
dc.description.abstractGiven the importance of the potential positive feedback between methane (CH4) emissions and climate change, it is critical to accurately estimate the magnitude and spatiotemporal patterns of CH4 emissions from global rice fields and better understand the underlying determinants governing the emissions. Here we used a coupled biogeochemical model in combination with satellite-derived contemporary inundation area to quantify the magnitude and spatiotemporal variation of CH4 emissions from global rice fields and attribute the environmental controls of CH4 emissions during 1901-2010. Our study estimated that CH4 emissions from global rice fields varied from 18.3 +/- 0.1 Tg CH4/yr (Avg. +/- 1 SD) under intermittent irrigation to 38.8 +/- 1.0 Tg CH4/yr under continuous flooding in the 2000s, indicating that the magnitude of CH4 emissions from global rice fields is largely dependent on different water schemes. Over the past 110 years, our simulated results showed that global CH4 emissions from rice cultivation increased by 85%. The expansion of rice fields was the dominant factor for the increasing trends of CH4 emissions, followed by elevated CO2 concentration, and nitrogen fertilizer use. On the contrary, climate variability had reduced the cumulative CH4 emissions for most of the years over the study period. Our results imply that CH4 emissions from global rice fields could be reduced through optimizing irrigation practices. Therefore, the future magnitude of CH4 emissions from rice fields will be determined by the human demand for rice production as well as the implementation of optimized water management practices.en_US
dc.formatPDFen_US
dc.publisherAMER GEOPHYSICAL UNIONen_US
dc.relation.ispartofGlobal Biogeochemical Cyclesen_US
dc.relation.ispartofseries0886-6236en_US
dc.rights©The Authors 2016. 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: Zhang, B., Tian, H., Ren, W., Tao, B., Lu, C., Yang, J., ... & Pan, S. (2016). Methane emissions from global rice fields: Magnitude, spatiotemporal patterns, and environmental controls. Global Biogeochemical Cycles, 30(9), 1246-1263.en_US
dc.subjectGREENHOUSE-GAS EMISSIONSen_US
dc.subjectNET PRIMARY PRODUCTIVITYen_US
dc.subjectELEVATED CARBON-DIOXIDEen_US
dc.subjectIRRIGATED RICEen_US
dc.subjectPADDY FIELDSen_US
dc.subjectCH4 Emissionsen_US
dc.subjectTERRESTRIAL ECOSYSTEMen_US
dc.subjectATMOSPHERIC METHANEen_US
dc.subjectNITROGEN ENRICHMENTen_US
dc.subjectTEMPORAL PATTERNSen_US
dc.titleMethane emissions from global rice fields: Magnitude, spatiotemporal patterns, and environmental controlsen_US
dc.typeCollectionen_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume30en_US
dc.citation.issue9en_US
dc.citation.spage1246en_US
dc.citation.epage1263en_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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