Have Synergies Between Nitrogen Deposition and Atmospheric CO₂ Driven the Recent Enhancement of the Terrestrial Carbon Sink?

ABSTRACT: The terrestrial carbon sink has increased since the turn of this century at a time of increased fossil fuel burning, yet the mechanisms enhancing this sink are not fully understood. Here we assess the hypothesis that regional increases in nitrogen deposition since the early 2000s has alleviated nitrogen limitation and worked in tandem with enhanced CO₂ fertilization to increase ecosystem productivity and carbon sequestration, providing a causal link between the parallel increases in emissions and the global land carbon sink. We use the Community Land Model (CLM4.5-BGC) to estimate the influence of changes in atmospheric CO₂, nitrogen deposition, climate, and their interactions to changes in net primary production and net biome production. We focus on two periods, 1901

SUBMITTER: O'Sullivan M 

PROVIDER: S-EPMC6472506 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature