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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Methane emissions from Amazonian Rivers and their contribution to the global methane budget

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Sawakuchi, Henrique O. [1] ; Bastviken, David [2] ; Sawakuchi, Andre O. [3] ; Krusche, Alex V. [1] ; Ballester, Maria V. R. [1] ; Richey, Jeffrey E. [4]
Total Authors: 6
[1] Univ Sao Paulo, Ctr Nucl Energy Agr, Environm Anal & Geoproc Lab, BR-13400970 Piracicaba, SP - Brazil
[2] Linkoping Univ, Dept Themat Studies Water & Environm Studies, SE-58183 Linkoping - Sweden
[3] Univ Sao Paulo, Inst Geosci, Dept Sedimentary & Environm Geol, BR-05508080 Sao Paulo - Brazil
[4] Univ Washington, Sch Oceanog, Seattle, WA 98195 - USA
Total Affiliations: 4
Document type: Journal article
Source: GLOBAL CHANGE BIOLOGY; v. 20, n. 9, p. 2829-2840, SEP 2014.
Web of Science Citations: 45

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, Solimoes, Madeira, Tapajos, Xingu, and Para 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. (AU)

FAPESP's process: 08/58089-9 - The role of rivers on the regional carbon cycle
Grantee:Maria Victoria Ramos Ballester
Support type: Research Program on Global Climate Change - Thematic Grants
FAPESP's process: 11/06609-1 - Provenance, transport and storage of sediments in Amazon rivers
Grantee:André Oliveira Sawakuchi
Support type: Regular Research Grants
FAPESP's process: 11/14502-2 - Regulating factors of methane (CH4) emission in depositional environments of the Rivers Negro, Tapajos, Xingu and Amazonas
Grantee:Henrique Oliveira Sawakuchi
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 12/17359-9 - Methane flux from rivers and different approaches for estimate methane production and oxidation from inland water systems
Grantee:Henrique Oliveira Sawakuchi
Support type: Scholarships abroad - Research Internship - Doctorate