Terrestrial Gross Carbon Dioxide Uptake: Global Distribution and Covariation with Climate

Terrestrial gross primary production (GPP) is the largest global CO2 °ux driving several ecosystem functions. We provide an observation- based estimate of this °ux at 123§8 PgCa¡1 using eddy covariance °ux data and various diagnostic models. Tropical forests and sa- vannahs account for 60%. GPP over 40% of the vegetated land is associated with precipitation. State-of-the-art process-oriented bio- sphere models used for climate predictions exhibit a large between- model variation of GPP's latitudinal patterns and show higher spa- tial correlations between GPP and precipitation, suggesting the ex- istence of missing processes or feedback mechanisms which attenu- ate the vegetation response to climate. Our estimates of spatially distributed GPP and its co-variation with climate can help improve coupled climate-carbon cycle process models.

BEER Christian;  REICHSTEIN Markus;  TOMELLERI Enrico;  CIAIS Philippe;  JUNG Martin;  CARVALHAIS Nuno;  RODENBECK Christian;  ARAIN Altaf;  BALDOCCHI Dennis;  BONAN Gordon B.;  BONDEAU Alberte;  CESCATTI Alessandro;  LASSLOP Gitta;  LINDROTH Anders;  LOMAS Mark;  LUYSSAERT Sebastiaan;  MARGOLIS Hank;  OLESON Keith W.;  ROUPSARD Olivier;  VEENENDAAL Elmar;  VIOVY Nicolas;  WILLIAMS Christopher;  WOODWARD F. Ian;  PAPALE Dario; 

2010-12-17

AMER ASSOC ADVANCEMENT SCIENCE

JRC59049

0036-8075,   

https://publications.jrc.ec.europa.eu/repository/handle/JRC59049,   

10.1126/science.1184984,