Precipitation and carbon-water coupling jointly control the interannual variability of global land gross primary production.

ABSTRACT: Carbon uptake by terrestrial ecosystems is increasing along with the rising of atmospheric CO₂ concentration. Embedded in this trend, recent studies suggested that the interannual variability (IAV) of global carbon fluxes may be dominated by semi-arid ecosystems, but the underlying mechanisms of this high variability in these specific regions are not well known. Here we derive an ensemble of gross primary production (GPP) estimates using the average of three data-driven models and eleven process-based models. These models are weighted by their spatial representativeness of the satellite-based solar-induced chlorophyll fluorescence (SIF). We then use this weighted GPP ensemble to investigate the GPP variability for different aridity regimes. We show that semi-arid regions contrib

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC5180184 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature