Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2018GL077536 |
Spatially Resolved Isotopic Source Signatures of Wetland Methane Emissions | |
Ganesan, A. L.1; Stell, A. C.2; Gedney, N.3; Comyn-Platt, E.4; Hayman, G.4; Rigby, M.2; Poulter, B.5; Hornibrook, E. R. C.6 | |
2018-04-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:8页码:3737-3745 |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA; Canada |
英文摘要 | We present the first spatially resolved wetland delta C-13(CH4) source signature map based on data characterizing wetland ecosystems and demonstrate good agreement with wetland signatures derived from atmospheric observations. The source signature map resolves a latitudinal difference of similar to 10% between northern high-latitude (mean similar to 67.8%) and tropical (mean similar to 56.7%) wetlands and shows significant regional variations on top of the latitudinal gradient. We assess the errors in inverse modeling studies aiming to separate CH4 sources and sinks by comparing atmospheric delta C-13(CH4) derived using our spatially resolved map against the common assumption of globally uniform wetland delta C-13(CH4) signature. We find a larger interhemispheric gradient, a larger high-latitude seasonal cycle, and smaller trend over the period 2000-2012. The implication is that erroneous CH4 fluxes would be derived to compensate for the biases imposed by not utilizing spatially resolved signatures for the largest source of CH4 emissions. These biases are significant when compared to the size of observed signals. Plain Language Summary Concentrations of methane are increasing in the atmosphere. In order to understand the reasons behind such variations, carbon isotopes are used to help identify changes in emission sources and sinks. We present a new global map of the carbon isotope signature associated with wetland methane emissions, the largest global source of methane to the atmosphere. We show how this newly synthesized information can lead to more accurate understanding of the causes of variations in the amount and rate of increase of methane in the atmosphere. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000435745500047 |
WOS关键词 | ATMOSPHERIC METHANE ; GLOBAL DISTRIBUTION ; FOSSIL-FUEL ; CARBON ; NORTHERN ; CH4 ; RATIOS ; MODEL ; BOG ; TEMPERATE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28972 |
专题 | 气候变化 |
作者单位 | 1.Univ Bristol, Sch Geog Sci, Bristol, Avon, England; 2.Univ Bristol, Sch Chem, Bristol, Avon, England; 3.Hadley Ctr, Met Off, Joint Ctr Hydrometeorol Res, Wallingford, Oxon, England; 4.Ctr Ecol & Hydrol, Wallingford, Oxon, England; 5.NASA, Goddard Space Flight Ctr, Biospher Sci Lab, Greenbelt, MD USA; 6.Univ British Columbia, Dept Earth Environm & Geog Sci, Okanagan Campus, Kelowna, BC, Canada |
推荐引用方式 GB/T 7714 | Ganesan, A. L.,Stell, A. C.,Gedney, N.,et al. Spatially Resolved Isotopic Source Signatures of Wetland Methane Emissions[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(8):3737-3745. |
APA | Ganesan, A. L..,Stell, A. C..,Gedney, N..,Comyn-Platt, E..,Hayman, G..,...&Hornibrook, E. R. C..(2018).Spatially Resolved Isotopic Source Signatures of Wetland Methane Emissions.GEOPHYSICAL RESEARCH LETTERS,45(8),3737-3745. |
MLA | Ganesan, A. L.,et al."Spatially Resolved Isotopic Source Signatures of Wetland Methane Emissions".GEOPHYSICAL RESEARCH LETTERS 45.8(2018):3737-3745. |
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