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Net exchanges of CO2, CH4, and N2O between China's terrestrial ecosystems and the atmosphere and their contributions to global climate warming


Metadata FieldValueLanguage
dc.contributorHanqin Tian, tianhan@auburn.eduen_US
dc.creatorTian, Hanqin
dc.creatorXu, Xiaofeng
dc.creatorLu, Chaoqun
dc.creatorLiu, Mingliang
dc.creatorRen, Wei
dc.creatorChen, Guangsheng
dc.creatorMelillo, Jerry
dc.creatorLiu, Jiyuan
dc.date.accessioned2022-10-25T19:45:44Z
dc.date.available2022-10-25T19:45:44Z
dc.date.created2011
dc.identifier10.1029/2010JG001393en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2010JG001393en_US
dc.identifier.urihttps://aurora.auburn.edu/handle/11200/50420
dc.identifier.urihttp://dx.doi.org/10.35099/aurora-488
dc.description.abstractChina's terrestrial ecosystems have been recognized as an atmospheric CO2 sink; however, it is uncertain whether this sink can alleviate global warming given the fluxes of CH4 and N2O. In this study, we used a process-based ecosystem model driven by multiple environmental factors to examine the net warming potential resulting from net exchanges of CO2, CH4, and N2O between China's terrestrial ecosystems and the atmosphere during 1961-2005. In the past 45 years, China's terrestrial ecosystems were found to sequestrate CO2 at a rate of 179.3 Tg C yr(-1) with a 95% confidence range of (62.0 Tg C yr(-1), 264.9 Tg C yr(-1)) while emitting CH4 and N2O at rates of 8.3 Tg C yr(-1) with a 95% confidence range of (3.3 Tg C yr(-1), 12.4 Tg C yr(-1)) and 0.6 Tg N yr(-1) with a 95% confidence range of (0.2 Tg N yr(-1), 1.1 Tg N yr(-1)), respectively. When translated into global warming potential, it is highly possible that China's terrestrial ecosystems mitigated global climate warming at a rate of 96.9 Tg CO(2)eq yr(-1) (1 Tg = 10(12) g), substantially varying from a source of 766.8 Tg CO(2)eq yr(-1) in 1997 to a sink of 705.2 Tg CO(2)eq yr(-1) in 2002. The southeast and northeast of China slightly contributed to global climate warming; while the northwest, north, and southwest of China imposed cooling effects on the climate system. Paddy land, followed by natural wetland and dry cropland, was the largest contributor to national warming potential; forest, followed by woodland and grassland, played the most significant role in alleviating climate warming. Our simulated results indicate that CH4 and N2O emissions offset approximately 84.8% of terrestrial CO2 sink in China during 1961-2005. This study suggests that the relieving effects of China's terrestrial ecosystems on climate warming through sequestering CO2 might be gradually offset by increasing N2O emission, in combination with CH4 emission.en_US
dc.formatPDFen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.ispartofJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCESen_US
dc.relation.ispartofseries2169-8953en_US
dc.rights©American Geophysical Union 2011. 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: Tian, H., Xu, X., Lu, C., Liu, M., Ren, W., Chen, G., ... & Liu, J. (2011). Net exchanges of CO2, CH4, and N2O between China's terrestrial ecosystems and the atmosphere and their contributions to global climate warming. Journal of Geophysical Research: Biogeosciences, 116(G2).en_US
dc.titleNet exchanges of CO2, CH4, and N2O between China's terrestrial ecosystems and the atmosphere and their contributions to global climate warmingen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume116en_US
dc.citation.issueG2en_US
dc.description.statusPublisheden_US
dc.description.peerreviewYesen_US
dc.creator.orcid0000-0002-6553-6514en_US
dc.creator.orcid0000-0002-1963-5933en_US
dc.creator.orcid0000-0002-1526-0513en_US
dc.creator.orcid0000-0002-4840-4835en_US
dc.creator.orcid0000-0002-1806-4091en_US

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