globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12646
论文题名:
Methane emissions from Amazonian Rivers and their contribution to the global methane budget
作者: Sawakuchi H.O.; Bastviken D.; Sawakuchi A.O.; Krusche A.V.; Ballester M.V.R.; Richey J.E.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期:9
起始页码: 2829
结束页码: 2840
语种: 英语
英文关键词: Amazon ; Ebullition ; Greenhouse gas ; Methane flux ; Natural emission ; Tropical rivers
Scopus关键词: carbon budget ; carbon emission ; greenhouse gas ; methane ; river ; tropical environment ; Amazonas [Brazil] ; Brazil ; Madeira River ; Para River ; Para [Brazil] ; Rio Negro [South America] ; Solimoes River ; Tapajos River ; Xingu River ; methane ; Brazil ; carbon cycle ; chemical model ; chemistry ; river ; season ; sediment ; Brazil ; Carbon Cycle ; Geologic Sediments ; Methane ; Models, Chemical ; Rivers ; Seasons
英文摘要: Methane (CH4) fluxes from world rivers are still poorly constrained, with measurements restricted mainly to temperate climates. Additional river flux measurements, including spatio-temporal studies, are important to refine extrapolations. Here we assess the spatio-temporal variability of CH4 fluxes from the Amazon and its main tributaries, the Negro, Solimões, Madeira, Tapajós, Xingu, and Pará Rivers, based on direct measurements using floating chambers. Sixteen of 34 sites were measured during low and high water seasons. Significant differences were observed within sites in the same river and among different rivers, types of rivers, and seasons. Ebullition contributed to more than 50% of total emissions for some rivers. Considering only river channels, our data indicate that large rivers in the Amazon Basin release between 0.40 and 0.58 Tg CH4 yr-1. Thus, our estimates of CH4 flux from all tropical rivers and rivers globally were, respectively, 19-51% to 31-84% higher than previous estimates, with large rivers of the Amazon accounting for 22-28% of global river CH4 emissions. © 2014 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62196
Appears in Collections:影响、适应和脆弱性

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作者单位: Environmental Analysis and Geoprocessing Laboratory, Center for Nuclear Energy in Agriculture, University of São Paulo, Av. Centenário 303, Piracicaba, SP, Brazil; Department of Thematic Studies - Water and Environmental Studies, Linköping University, Linköping, SE-581 83, Sweden; Department of Sedimentary and Environmental Geology, Institute of Geosciences, University of São Paulo, Rua do Lago 562, São Paulo, SP, 05508-080, Brazil; School of Oceanography, University of Washington, Seattle, WA, 98195-7940, United States

Recommended Citation:
Sawakuchi H.O.,Bastviken D.,Sawakuchi A.O.,et al. Methane emissions from Amazonian Rivers and their contribution to the global methane budget[J]. Global Change Biology,2014-01-01,20(9)
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