Biogenic gas production from major Amazon reservoirs, Brazil

Rosa, Luiz Pinguelli; Santos, Marco Aurélio dos; Matvienko, Bohdan; Sikar, E.; Lourenço, Ronaldo Sérgio M.; Menezes, Carlos Frederico

doi:10.1002/hyp.1295

Cited by 44 publications

(32 citation statements)

References 8 publications

(6 reference 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: 48%

Spatial and seasonal variability of CO2 flux at the air-water interface of the Three Gorges Reservoir

Yang¹,

Lu²,

Wang³

et al. 2013

Journal of Environmental Sciences

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Diffusive carbon dioxide (CO 2 ) emissions from the water surface of the Three Gorges Reservoir, currently the largest hydroelectric reservoir in the world, were measured using floating static chambers over the course of a yearlong survey. The results showed that the average annual CO 2 flux was (163.3 ± 117.4) mg CO 2 /(m 2 ·hr) at the reservoir surface, which was larger than the CO 2 flux in most boreal and temperate reservoirs but lower than that in tropical reservoirs. Significant spatial variations in CO 2 flux were observed at four measured sites, with the largest flux measured at Wushan (221.9 mg CO 2 /(m 2 ·hr)) and the smallest flux measured at Zigui (88.6 mg CO 2 /(m 2 ·hr)); these differences were probably related to the average water velocities at different sites. Seasonal variations in CO 2 flux were also observed at four sites, starting to increase in January, continuously rising until peaking in the summer (JuneAugust) and gradually decreasing thereafter. Seasonal variations in CO 2 flux could reflect seasonal dynamics in pH, water velocity, and temperature. Since the spatial and temporal variations in CO 2 flux were significant and dependent on multiple physical, chemical, and hydrological factors, it is suggested that long-term measurements should be made on a large spatial scale to assess the climatic influence of hydropower in China, as well as the rest of the world.

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Section: Carbon Budget At the Tgrmentioning

confidence: 48%

Spatial and seasonal variability of CO2 flux at the air-water interface of the Three Gorges Reservoir

Yang¹,

Lu²,

Wang³

et al. 2013

Journal of Environmental Sciences

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“…These bacteria can also form biologically inert residual materials, such as humic acid and retinoic acid (Rosa et al 2000). In a tropical zone, a lot of vegetation is submerged at high temperature, and the reservoir's CH 4 emission can be up to 1140 mg/(m 2 day) (Louis et al 2000), close to the highest CH 4 emission 1159 mg/(m 2 day) which was detected on July 21 in this experiment.…”

Section: Discussionmentioning

confidence: 74%

“…Indeed, in Samuel reservoirs, methane emissions from bubbles arising at a water depth of \5 m were far greater [60 * 70 mg/(m 2 day)] than at greater depths [[5 m; 2 mg/ (m 2 day)]. Similarly, in Tucuru reservoir, methane bubble emission flux varied between 0.5 and 30 mg/(m 2 day) with the maximum value occurring in shallow water (Rosa et al 2000). Likewise, the depths (below 2 m) of the freshwater ponds in this experiment were optimal for CH 4 emissions.…”

Section: Discussionmentioning

confidence: 91%

“…In the sediment layer of tropical reservoirs, oxygen is consumed rapidly, so some methane bubbles can be oxidized to carbon dioxide while rising to the surface. However, the methane bubbles in the shoal waters of reservoirs can reach the surface of water before being oxidized, resulting in large methane emissions (Rosa et al 2000). Indeed, in Samuel reservoirs, methane emissions from bubbles arising at a water depth of \5 m were far greater [60 * 70 mg/(m 2 day)] than at greater depths [[5 m; 2 mg/ (m 2 day)].…”

Section: Discussionmentioning

confidence: 98%

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Greenhouse gas emissions and comprehensive greenhouse effect potential of Megalobrama amblycephala culture pond ecosystems in a 3-month growing season

Zhu¹,

Xuan²,

Liu³

et al. 2015

Aquacult Int

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In this study, we assess the greenhouse gas emissions and greenhouse effect potential of a Wuchang bream (Megalobrama amblycephala) aquaculture. We used the 'static opaque chamber-gas chromatography method' to determine in situ emissions of greenhouse gases in the 3-month growing season (CO 2 , CH 4 , and N 2 O) from bream culturing ponds. We detected emissions of all three gases from the ponds, with CO 2 emission far exceeding the other gases in the 3-month growing season (CO 2 = 278.54 ± 36.41 g/m 2 , CH 4 = 23.73 ± 5.27 g/m 2 , and N 2 O = 1.69 ± 0.32 g/m 2 ). We calculated that in one growing season this ecosystem would have a total emission of CO 2 equivalent of 15.86 t CO 2 /hm 2 , indicating its ability to contribute to global warming via the greenhouse effect.

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“…Research conducted by national and international teams has given successive contributions to the understanding of greenhouse gases emissions from Brazilian hydroelectric reservoirs (Rosa et al, 1994(Rosa et al, , 2003Guerin et al, 2006;Santos et al, 2006;Roland et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Diffusive emission of methane and carbon dioxide from two hydropower reservoirs in Brazil

Marcelino

Santos²,

Xavier³

et al. 2015

Braz. J. Biol.

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The role of greenhouse gas emissions from freshwater reservoirs and their contribution to increase greenhouse gas concentrations in the atmosphere is currently under discussion in many parts of the world. We studied CO 2 and CH 4 diffusive fluxes from two large neotropical hydropower reservoirs with different climate conditions. We used floating closed-chambers to estimate diffusive fluxes of these gaseous species. Sampling campaigns showed that the reservoirs studied were sources of greenhouse gases to the atmosphere. In the Serra da Mesa Reservoir, the CH 4 emissions ranged from 0.530 to 396.96 mg.m -2 .d -1 and CO 2 emissions ranged from -1,738.33 to 11,166.61 mg.m -2 .d -1 and in Três Marias Reservoir the CH 4 fluxes ranged 0.720 to 2,578.03 mg.m -2 .d -1 and CO 2 emission ranged from -3,037.80 to 11,516.64 to mg.m -2 .d -1 . There were no statistically significant differences of CH 4 fluxes between the reservoirs, but CO 2 fluxes from the two reservoirs studied were significantly different. The CO 2 emissions measured over the periods studied in Serra da Mesa showed some seasonality with distinctions between the wet and dry transition season. In Três Marias Reservoir the CO 2 fluxes showed no seasonal variability. In both reservoirs, CH 4 emissions showed a tendency to increase during the study periods but this was not statistically significant. These results contributed to increase knowledge about the magnitude of CO 2 and CH 4 emission in hydroelectric reservoirs, however due to natural variability of the data future sampling campaigns will be needed to better elucidate the seasonal influences on the fluxes of greenhouse gases.Keywords: hydropower, dissolved organic carbon, greenhouse gas effect, lakes, reservoirs, CO 2 emissions. Emissões difusivas de metano

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Biogenic gas production from major Amazon reservoirs, Brazil

Cited by 44 publications

References 8 publications

Spatial and seasonal variability of CO2 flux at the air-water interface of the Three Gorges Reservoir

Spatial and seasonal variability of CO2 flux at the air-water interface of the Three Gorges Reservoir

Greenhouse gas emissions and comprehensive greenhouse effect potential of Megalobrama amblycephala culture pond ecosystems in a 3-month growing season

Diffusive emission of methane and carbon dioxide from two hydropower reservoirs in Brazil

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