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Article: Interannual variation in methane emissions from tropical wetlands triggered by repeated El Niño Southern Oscillation

TitleInterannual variation in methane emissions from tropical wetlands triggered by repeated El Niño Southern Oscillation
Authors
Keywordsatmospheric methane
methane emission
El Niño–Southern Oscillation
tropical wetlands
Issue Date2017
Citation
Global Change Biology, 2017, v. 23, n. 11, p. 4706-4716 How to Cite?
Abstract© 2017 John Wiley & Sons Ltd Methane (CH4) emissions from tropical wetlands contribute 60%–80% of global natural wetland CH4 emissions. Decreased wetland CH4 emissions can act as a negative feedback mechanism for future climate warming and vice versa. The impact of the El Niño–Southern Oscillation (ENSO) on CH4 emissions from wetlands remains poorly quantified at both regional and global scales, and El Niño events are expected to become more severe based on climate models’ projections. We use a process-based model of global wetland CH4 emissions to investigate the impacts of the ENSO on CH4 emissions in tropical wetlands for the period from 1950 to 2012. The results show that CH4 emissions from tropical wetlands respond strongly to repeated ENSO events, with negative anomalies occurring during El Niño periods and with positive anomalies occurring during La Niña periods. An approximately 8-month time lag was detected between tropical wetland CH4 emissions and ENSO events, which was caused by the combined time lag effects of ENSO events on precipitation and temperature over tropical wetlands. The ENSO can explain 49% of interannual variations for tropical wetland CH4 emissions. Furthermore, relative to neutral years, changes in temperature have much stronger effects on tropical wetland CH4 emissions than the changes in precipitation during ENSO periods. The occurrence of several El Niño events contributed to a lower decadal mean growth rate in atmospheric CH4 concentrations throughout the 1980s and 1990s and to stable atmospheric CH4 concentrations from 1999 to 2006, resulting in negative feedback to global warming.
Persistent Identifierhttp://hdl.handle.net/10722/296820
ISSN
2023 Impact Factor: 10.8
2023 SCImago Journal Rankings: 4.285
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhu, Qiuan-
dc.contributor.authorPeng, Changhui-
dc.contributor.authorCiais, Philippe-
dc.contributor.authorJiang, Hong-
dc.contributor.authorLiu, Jinxun-
dc.contributor.authorBousquet, Philippe-
dc.contributor.authorLi, Shiqin-
dc.contributor.authorChang, Jie-
dc.contributor.authorFang, Xiuqin-
dc.contributor.authorZhou, Xiaolu-
dc.contributor.authorChen, Huai-
dc.contributor.authorLiu, Shirong-
dc.contributor.authorLin, Guanghui-
dc.contributor.authorGong, Peng-
dc.contributor.authorWang, Meng-
dc.contributor.authorWang, Han-
dc.contributor.authorXiang, Wenhua-
dc.contributor.authorChen, Jing-
dc.date.accessioned2021-02-25T15:16:45Z-
dc.date.available2021-02-25T15:16:45Z-
dc.date.issued2017-
dc.identifier.citationGlobal Change Biology, 2017, v. 23, n. 11, p. 4706-4716-
dc.identifier.issn1354-1013-
dc.identifier.urihttp://hdl.handle.net/10722/296820-
dc.description.abstract© 2017 John Wiley & Sons Ltd Methane (CH4) emissions from tropical wetlands contribute 60%–80% of global natural wetland CH4 emissions. Decreased wetland CH4 emissions can act as a negative feedback mechanism for future climate warming and vice versa. The impact of the El Niño–Southern Oscillation (ENSO) on CH4 emissions from wetlands remains poorly quantified at both regional and global scales, and El Niño events are expected to become more severe based on climate models’ projections. We use a process-based model of global wetland CH4 emissions to investigate the impacts of the ENSO on CH4 emissions in tropical wetlands for the period from 1950 to 2012. The results show that CH4 emissions from tropical wetlands respond strongly to repeated ENSO events, with negative anomalies occurring during El Niño periods and with positive anomalies occurring during La Niña periods. An approximately 8-month time lag was detected between tropical wetland CH4 emissions and ENSO events, which was caused by the combined time lag effects of ENSO events on precipitation and temperature over tropical wetlands. The ENSO can explain 49% of interannual variations for tropical wetland CH4 emissions. Furthermore, relative to neutral years, changes in temperature have much stronger effects on tropical wetland CH4 emissions than the changes in precipitation during ENSO periods. The occurrence of several El Niño events contributed to a lower decadal mean growth rate in atmospheric CH4 concentrations throughout the 1980s and 1990s and to stable atmospheric CH4 concentrations from 1999 to 2006, resulting in negative feedback to global warming.-
dc.languageeng-
dc.relation.ispartofGlobal Change Biology-
dc.subjectatmospheric methane-
dc.subjectmethane emission-
dc.subjectEl Niño–Southern Oscillation-
dc.subjecttropical wetlands-
dc.titleInterannual variation in methane emissions from tropical wetlands triggered by repeated El Niño Southern Oscillation-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/gcb.13726-
dc.identifier.pmid28418083-
dc.identifier.scopuseid_2-s2.0-85019667883-
dc.identifier.volume23-
dc.identifier.issue11-
dc.identifier.spage4706-
dc.identifier.epage4716-
dc.identifier.eissn1365-2486-
dc.identifier.isiWOS:000412322700022-
dc.identifier.issnl1354-1013-

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