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Methane exchange between marshland and the atmosphere over China during 1949-2008


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dc.contributorHanqin Tian, tianhan@auburn.eduen_US
dc.creatorXu, Xiaofeng
dc.creatorTian, Hanqin
dc.date.accessioned2020-02-25T16:31:07Z
dc.date.available2020-02-25T16:31:07Z
dc.date.created2012
dc.identifier10.1029/2010GB003946en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2010GB003946en_US
dc.identifier.urihttp://hdl.handle.net/11200/49745
dc.description.abstractWe used a process-based ecosystem model to examine methane (CH4) fluxes in the marshland across China as a result of multifactor global changes during 1949–2008. Our simulated results show a significant declining rate of 18.7 Gg Ca 1 (1Gg = 109 g) (with a 95% confidence boundary of 17.6 19.8 Gg C a 1 ) at national scale, but substantially varying from the maximum annual CH4 emission of 2.4 Tg C a 1 (1Tg = 1012 g) (with a 95% confident boundary of 1.8 3.4 Tg C a 1 ) in 1952 to the minimum annual CH4 emission of 1.3 Tg C a 1 (with a 95% confident boundary of 1.0 1.9 Tg C a 1 ) in 2003. The marshland loss made the largest contribution to the CH4 emission reduction with an cumulative effect of 37.9 Tg C (with a 95% confident boundary of 28.0 54.1 Tg C) for the past 60 years. Ozone pollution reduced CH4 emission, while elevated atmospheric CO2, nitrogen deposition, climate change, and multiple-factor interaction, cumulatively stimulated CH4 emission. Climate variability predominately controlled the inter-annual variations in CH4 emissions. A substantial spatial variation in CH4 emission was observed across China’s marshland. At regional scale, the Northeast, followed by Northwest and Southeast, made the greatest contribution, while North and Southwest made minor contributions to the national CH4 emission. This study suggests that it is necessary to consider multiple global change factors when estimating regional CH4 fluxes in natural wetlands.en_US
dc.relation.ispartofGlobal Biogeochemical Cyclesen_US
dc.relation.ispartofseries0886-6236en_US
dc.rights©The Authors 2012. This article is open access and is the final publisher's version of the work. The article should be cited as: Xu, X., & Tian, H. (2012). Methane exchange between marshland and the atmosphere over China during 1949–2008. Global Biogeochemical Cycles, 26(2).en_US
dc.titleMethane exchange between marshland and the atmosphere over China during 1949-2008en_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume26en_US
dc.citation.issue2en_US
dc.citation.spageGB2006-1en_US
dc.citation.epageGB2006-14en_US
dc.description.statusPublisheden_US
dc.description.peerreviewyesen_US
dc.creator.orcid0000-0002-1806-4091en_US
dc.creator.orcid0000-0002-6553-6514en_US

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