@article{fdi:010060400,
  title = {{W}ood decomposition in {A}mazonian hydropower reservoirs : an additional source of greenhouse gases},
  author = {{A}bril, {G}wena{\¨e}l and {P}arize, {M}. and {P}erez, {M}. {A}. {P}. and {F}ilizola, {N}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}mazonian hydroelectric reservoirs produce abundant carbon dioxide and methane from large quantities of flooded biomass that decompose anaerobically underwater. {E}missions are extreme the first years after impounding and progressively decrease with time. {T}o date, only water-to-air fluxes have been considered in these estimates. {H}ere, we investigate in two {A}mazonian reservoirs ({B}albina and {P}etit {S}aut) the fate of above water standing dead trees, by combining a qualitative analysis of wood state and density through time and a quantitative analysis of the biomass initially flooded. {D}ead wood was much more decomposed in the {B}albina reservoir 23 years after flooding than in the {P}etit {S}aut reservoir 10 years after flooding. {T}ermites apparently played a major role in wood decomposition, occurring mainly above water, and resulting in a complete conversion of this carbon biomass into {CO}2 and {CH}4 at a timescale much shorter than reservoir operation. {T}he analysis of pre-impounding wood biomass reveals that above-water decomposition in {A}mazonian reservoirs is a large, previously unrecognized source of carbon emissions to the atmosphere, representing 26-45% of the total reservoir flux integrated over 100 years. {A}ccounting for both below-and above-water fluxes, we could estimate that each km(2) of {A}mazonian forest converted to reservoir would emit over 140 {G}g {CO}2-eq in 100 years. {H}ydropower plants in the {A}mazon should thus generate 0.25-0.4 {MW} h per km(2) flooded area to produce lower greenhouse gas emissions than gas power plants. {T}hey also have the disadvantage to emit most of their greenhouse gases the earliest years of operation.},
  keywords = {{H}ydroelectric dams ; {G}reenhouse gases ; {A}mazon basin ; {BRESIL} ; {GUYANE} {FRANCAISE} ; {AMAZONE} {BASSIN}},
  booktitle = {},
  journal = {{J}ournal of {S}outh {A}merican {E}arth {S}ciences},
  volume = {44},
  numero = {{SI}},
  pages = {104--107},
  ISSN = {0895-9811},
  year = {2013},
  DOI = {10.1016/j.jsames.2012.11.007},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060400},
}