Greenhouse Gas Concentration and Volcanic Eruptions Controlled the Variability of Terrestrial Carbon Uptake Over the Last Millennium.

ABSTRACT: The terrestrial net biome production (NBP) is considered as one of the major drivers of interannual variation in atmospheric CO₂ levels. However, the determinants of variability in NBP under the background climate (i.e., preindustrial conditions) remain poorly understood, especially on decadal-to-centennial timescales. We analyzed 1,000-year simulations spanning 850-1,849 from the Community Earth System Model (CESM) and found that the variability in NBP and heterotrophic respiration (RH) were largely driven by fluctuations in the net primary production (NPP) and carbon turnover rates in response to climate variability. On interannual to multidecadal timescales, variability in NBP was dominated by variation in NPP, while variability in RH was driven by variation in turnover rates

SUBMITTER: Zhang X 

PROVIDER: S-EPMC6774283 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature