IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Uncertainty and dynamics of natural wetland CH4 release in China: Research status and priorities
Wei, Da; Wang, Xiaodan
Corresponding AuthorXiaodan Wang
2017
Source PublicationATMOSPHERIC ENVIRONMENT
ISSN1352-2310
EISSN1873-2844
Volume154Pages:95-105
SubtypeReview
Abstract

Natural wetlands represent the largest single source of methane (CH4), a potent greenhouse gas. China is home to the world's fourth largest wetland area, and it is facing intense climate- and human-related impacts. The scientific community in China has invested considerable effort into investigating wetland CH4 release and its dynamics. Static chamber and eddy covariance observations have verified the temperature, water regime and air pressure as factors that regulate the diurnal and seasonal variation of CH4 release. Non-growing seasons, especially freezing thawing cycles, play a role in CH4 release. However, a knowledge gap still exists with respect to the inter-annual variability of CH4 release. Observations also suggest that water and temperature regimes control the micro- and macro-scale spatial pattern of CH4 release, respectively. Recent bookkeeping surveys, biogeochemical model simulations, and chemical transport model inversions, have narrowed the uncertainty range of national CH4 release to 2.46-3.20, 2.77-4.95 and 238-4.91 Tg CH4 yr(-1), respectively. Wetland loss (especially cropland conversion in Northeast China), despite climate changes, decreased CH4 release by 45.2%-52.2% from the 1950s-2000s, and by 13.2%-15.4% from the 1980s-2000s. However, future warmer temperatures and rising CO2 are predicted to strengthen national CH4 release by 32% (RCP2.6), 55% (RCP4.5) and 91% (RCP8.5) by the 2080s, albeit without the variation in wetland extent having been considered. Furthermore, future research should emphasize the mechanisms involved in CH4 release during freezing thawing cycles and interannual variability. Model data fusion of eddy covariance and manipulative experiments, especially warming and CO2 enrichment, would benefit estimations and projections of CH4 release. (C) 2017 Elsevier Ltd. All rights reserved.

KeywordMethane (Ch4) Natural Wetland Climate Change Land Use Change China
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1016/j.atmosenv.2017.01.038
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
Indexed BySCI
WOS KeywordFRESH-WATER MARSHES ; QINGHAI-TIBETAN PLATEAU ; AIR CO2 ENRICHMENT ; METHANE EMISSIONS ; NORTHEAST CHINA ; ATMOSPHERIC METHANE ; ECOSYSTEM RESPIRATION ; METHANOGENIC ARCHAEA ; SANJIANG PLAIN ; CARBON-DIOXIDE
Language英语
Quartile2区
TOP
WOS SubjectEnvironmental Sciences ; Meteorology & Atmospheric Sciences
WOS IDWOS:000397551800009
Funding OrganizationNational Natural Scientific Foundation of China(41305122 ; Institute of Mountain Hazards and Environments, Chinese Academy of Sciences(Y6K2220220 ; 41671102) ; Y6K2070070)
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18618
Collection山地表生过程与生态调控重点实验室
AffiliationChinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Processes & Ecol Regulat, Chengdu 610041, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Wei, Da,Wang, Xiaodan. Uncertainty and dynamics of natural wetland CH4 release in China: Research status and priorities[J]. ATMOSPHERIC ENVIRONMENT,2017,154:95-105.
APA Wei, Da,&Wang, Xiaodan.(2017).Uncertainty and dynamics of natural wetland CH4 release in China: Research status and priorities.ATMOSPHERIC ENVIRONMENT,154,95-105.
MLA Wei, Da,et al."Uncertainty and dynamics of natural wetland CH4 release in China: Research status and priorities".ATMOSPHERIC ENVIRONMENT 154(2017):95-105.
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