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| Titel |
Spatial and temporal patterns of greenhouse gas emissions from Three Gorges Reservoir of China |
| VerfasserIn |
Y. Zhao, B. F. Wu, Y. Zeng |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 2 ; Nr. 10, no. 2 (2013-02-26), S.1219-1230 |
| Datensatznummer |
250018118
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| Publikation (Nr.) |
 copernicus.org/bg-10-1219-2013.pdf |
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| Zusammenfassung |
| Anthropogenic activity has led to significant emissions of greenhouse gas
(GHG), which is thought to play important roles in global climate changes. It
remains unclear about the kinetics of GHG emissions, including carbon dioxide
(CO2), methane (CH4) and nitrous Oxide (N2O) from the Three
Gorges Reservoir (TGR) of China, which was formed after the construction of
the famous Three Gorges Dam. Here we report monthly measurements for one
year of the fluxes of these gases at multiple sites within the TGR region,
including three major tributaries, six mainstream sites, two downstream
sites and one upstream site. The tributary areas have lower CO2 fluxes
than the main storage; CH4 fluxes in the tributaries and upper reach
mainstream sites are relative higher. Overall, TGR showed significantly
lower CH4 emission rates than most new reservoirs in temperate and
tropical regions. We attribute this to the well-oxygenated deep water and
high water velocities that may facilitate the consumption of CH4. TGR's
CO2 fluxes were lower than most tropical reservoirs and higher than
most temperate systems. This could be explained by the high load of labile
soil carbon delivered through erosion to the Yangtze River. Compared to
fossil-fuelled power plants of equivalent power output, TGR is a very small
GHG emitter – annual CO2-equivalent emissions are approximately 1.7%
of that of a coal-fired generating plant of comparable power output. |
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