Articles | Volume 18, issue 4
https://doi.org/10.5194/bg-18-1333-2021
https://doi.org/10.5194/bg-18-1333-2021
Research article
 | 
22 Feb 2021
Research article |  | 22 Feb 2021

Changing sources and processes sustaining surface CO2 and CH4 fluxes along a tropical river to reservoir system

Cynthia Soued and Yves T. Prairie

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Cited articles

Adams, D. D.: Diffuse Flux of Greenhouse Gases – Methane and Carbon Dioxide – at the Sediment-Water Interface of Some Lakes and Reservoirs of the World, in: Greenhouse Gas Emissions – Fluxes and Processes, Springer-Verlag, Berlin Heidelberg, 129–153, 2005. 
Algesten, G., Sobek, S., Bergström, A. K., Jonsson, A., Tranvik, L. J., and Jansson, M.: Contribution of sediment respiration to summer CO2 emission from low productive boreal and subarctic lakes, Microb. Ecol., 50, 529–535, https://doi.org/10.1007/s00248-005-5007-x, 2005. 
Appling, A. P., Hall, R. O., Arroita, M., and Yackulic, C. B.: StreamMetabolizer: Models for Estimating Aquatic Photosynthesis and Respiration, available at: https://github.com/USGS-R/streamMetabolizer (last access: 1 May 2020), 2018. 
Barrette, N. and Laprise, R.: A One-Dimensional Model for Simulating the Vertical Transport of Dissolved CO2 and CH4 in Hydroelectric Reservoirs, in: Greenhouse Gas Emissions – Fluxes and Processes, Springer-Verlag, Berlin Heidelberg, 575–595, 2005. 
Barros, N., Cole, J. J., Tranvik, L. J., Prairie, Y. T., Bastviken, D., Huszar, V. L. M., del Giorgio, P., and Roland, F.: Carbon emission from hydroelectric reservoirs linked to reservoir age and latitude, Nat. Geosci., 4, 593–596, https://doi.org/10.1038/ngeo1211, 2011. 
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Short summary
Freshwater reservoirs emit greenhouse gases (GHGs, CO2 and CH4) to the atmosphere; however, the sources underlying these emissions are numerous, and their magnitude is not well known. This study quantifies surface CO2 and CH4 emissions and all their potential sources in a tropical reservoir. Results highlight the changes in GHG sources along the river–reservoir continuum, with internal metabolism being a key component but highly uncertain and challenging to estimate at an ecosystem scale.
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