Terrestrial gross carbon dioxide uptake: global distribution and covariation with climate.

  title={Terrestrial gross carbon dioxide uptake: global distribution and covariation with climate.},
  author={Christian Beer and Markus Reichstein and Enrico Tomelleri and Philippe Ciais and Martin Jung and Nuno Carvalhais and Christian R{\"o}denbeck and Mohammed A. Arain and D. Baldocchi and Gordon B Bonan and Alberte Bondeau and Alessandro Cescatti and G Lasslop and Anders Lindroth and Mark Lomas and Sebastiaan Luyssaert and Hank Margolis and Keith W. Oleson and Olivier Roupsard and Elmar M. Veenendaal and Nicolas Viovy and Christopher J. Williams and F. Ian Woodward and Dario Papale},
  volume={329 5993},
Terrestrial gross primary production (GPP) is the largest global CO(2) flux driving several ecosystem functions. We provide an observation-based estimate of this flux at 123 +/- 8 petagrams of carbon per year (Pg C year(-1)) using eddy covariance flux data and various diagnostic models. Tropical forests and savannahs account for 60%. GPP over 40% of the vegetated land is associated with precipitation. State-of-the-art process-oriented biosphere models used for climate predictions exhibit a… CONTINUE READING
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