Outgassing from Amazonian rivers and wetlands as a large tropical source of atmospheric CO2

  title={Outgassing from Amazonian rivers and wetlands as a large tropical source of atmospheric CO2},
  author={Jeffrey E. Richey and John M. Melack and Anthony K. Aufdenkampe and Victoria M. Ballester and Laura L. Hess},
Terrestrial ecosystems in the humid tropics play a potentially important but presently ambiguous role in the global carbon cycle. Whereas global estimates of atmospheric CO2 exchange indicate that the tropics are near equilibrium or are a source with respect to carbon, ground-based estimates indicate that the amount of carbon that is being absorbed by mature rainforests is similar to or greater than that being released by tropical deforestation (about 1.6 Gt C yr-1). Estimates of the magnitude… 

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