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Chemosphere. 2005 Jun;59(11):1697-702.

Biogeochemical distinction of methane releases from two Amazon hydroreservoirs.

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  • 1National Institute for Space Research, Remote Sensing Division, Processes of the Hydrosphere, Astronautas Av. 1758, Sao Jose dos Campos, SP, 12227-010,


Biogeochemical distinction of methane emissions to the atmosphere may essentially rely on the surface area and morphometry of Amazon hydroreservoirs. Tucurui (deep) and Samuel (shallow) reservoirs released in average 13.82+/-22.94 and 71.19+/-107.4 mg CH4 m(-2)d(-1), respectively. delta13C-CH4 values from the sediments to the atmosphere indicate that the deep reservoir has extended methanotrophic layer, oxidizing large quantities of light isotope methane coming from the sediments, while sediment-generated methane can easily evade the shallow reservoir.

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