2005
DOI: 10.1029/2005gb002457
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Carbon dioxide and methane emissions and the carbon budget of a 10‐year old tropical reservoir (Petit Saut, French Guiana)

Abstract: [1] The emissions of carbon dioxide (CO 2 ) and methane (CH 4 ) from the Petit Saut hydroelectric reservoir (Sinnamary River, French Guiana) to the atmosphere were quantified for 10 years since impounding in 1994. Diffusive emissions from the reservoir surface were computed from direct flux measurements in 1994, 1995, and 2003 and from surface concentrations monitoring. Bubbling emissions, which occur only at water depths lower than 10 m, were interpolated from funnel measurements in 1994, 1997, and 2003. D… Show more

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Cited by 430 publications
(524 citation statements)
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“…If adding in the diffusive CH 4 emission from the surface of the TGR (2.46 Gg CH 4 /yr; Chen et al, 2011), the total diffusive emissions of C-CO 2 and C-CH 4 were 0.36-0.38 Tg C/yr from the reservoir surface (CO 2 equivalent) ( Table 3). The diffusive CO 2 flux at the surface was the dominant fraction in a hydroelectric system, which accounted for 99% of the total CO 2 emission from the reservoir surface (Rosa et al, 2003;Abril et al, 2005;Kemenes et al, 2011). The frequency of bubble occurrence was 5% in our experiment.…”
Section: Carbon Budget At the Tgrmentioning
confidence: 72%
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“…If adding in the diffusive CH 4 emission from the surface of the TGR (2.46 Gg CH 4 /yr; Chen et al, 2011), the total diffusive emissions of C-CO 2 and C-CH 4 were 0.36-0.38 Tg C/yr from the reservoir surface (CO 2 equivalent) ( Table 3). The diffusive CO 2 flux at the surface was the dominant fraction in a hydroelectric system, which accounted for 99% of the total CO 2 emission from the reservoir surface (Rosa et al, 2003;Abril et al, 2005;Kemenes et al, 2011). The frequency of bubble occurrence was 5% in our experiment.…”
Section: Carbon Budget At the Tgrmentioning
confidence: 72%
“…However, algal blooms hardly occurred in the summer because of high water velocity in the mainstream of the TGR then (Xin et al, 2011). Negative CO 2 flux was often reported in other reservoirs in the world, such as the Três Marias Reservoir in Brazil (dos Santos et al, 2006), Petit Saut Reservoir in French Guiana (Abril et al, 2005), and F. D. Roosevelt, Dworshak, Wallula, and New Melones Reservoirs in the western United States (Soumis et al, 2004). These negative fluxes were possibly related to high phytoplankton activity.…”
Section: Temporal Variation In Co 2 Fluxmentioning
confidence: 99%
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“…By taking up gaseous CO 2 the phytoplankton has an active role in creating concentration difference between the lake surface and the atmosphere, which is crucial for CO 2 influx. In fact, primary production simply changes the carbon from an inorganic to an organic form within the lake but does not affect the whole system's carbon budget (Abril et al, 2005). In our study, CO 2 absorption and emission by photosynthesis and respiration were included in gaseous carbon exchange (G).…”
Section: Overall Mass Balancementioning
confidence: 99%
“…Recently another important negative impact of dam construction has been reported: emission of greenhouse gases generated by flooding organic matter during reservoir formation. Since the beginning of the 1990's several scientists have argued that hydropower reservoirs, as well as natural ecosystems, emit biogenic gases by bubbling and by molecular diffusion (Rudd et al, 1993;Bartlett and Harriss, 1993;Kelly et al, 1997;Hamilton et al, 1995;Abril et al, 2005).…”
Section: Introductionmentioning
confidence: 99%