The Impact of Terrestrial Biosphere Carbon Exchanges on the Anomalous CO2 Increase in 2002-2003

Understanding the carbon dynamics of the terrestrial biosphere during climate fluctuations is a prerequisite for any reliable modeling of the climate-carbon cycle feedback. We drive a terrestrial vegetation model with observed climate data to show that most of the fluctuations in atmospheric CO2 are consistent with the modeled shift in the balance between carbon uptake by terrestrial plants and carbon loss through soil and plant respiration. Simulated anomalies of the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) during the last two El Niño events also agree well with satellite observations. Our model results suggest that changes in net primary productivity (NPP) are mainly responsible for the observed anomalies in the atmospheric CO2 growth rate.

KNORR Wolfgang;  GOBRON Nadine;  SCHOLZE Marko;  KAMINSKI Thomas;  SCHNUR Reiner;  PINTY Bernard; 

2007-05-14

AMER GEOPHYSICAL UNION

JRC36695

https://publications.jrc.ec.europa.eu/repository/handle/JRC36695,   

10.1029/2006GL029019,