Soenke Zaehle

TL;DR: Using an ensemble of ecosystem and land-surface models and an empirical observation-based product of global gross primary production, it is shown that the mean sink, trend, and interannual variability in CO2 uptake by terrestrial ecosystems are dominated by distinct biogeographic regions.

TL;DR: Carbon-nitrogen interactions significantly influence the simulated response of carbon cycle to temperature and atmospheric CO2 concentration, suggesting that nutrients limitations should be included in the next generation of terrestrial biosphere models.

TL;DR: The strength of the relationship between the interannual variability of growing season NDVI and temperature (partial correlation coefficient RNDVI-GT) declined substantially between 1982 and 2011 and is mainly observed in temperate and arctic ecosystems.

TL;DR: The results suggest that improved representation of above-ground–below-ground interactions and better constraints on plant stoichiometry are important for a predictive understanding of eCO2 effects and improved accuracy of soil organic matter inventories is pivotal to reduce uncertainty in the observed C–N budgets.

TL;DR: An intercomparison of 11 ecosystem models applied to data from two forest free-air CO2 enrichment experiments at Duke University and Oak Ridge National Laboratory yields a framework for analysing and interpreting model predictions of transpiration responses to eCO2, and highlights key improvements to these types of models.