The decline in tropical land carbon sink drove high atmospheric CO₂ growth rate in 2023.

ABSTRACT: Atmospheric CO₂ growth rate (CGR), reflecting the carbon balance between anthropogenic emissions and net uptake from land and ocean, largely determines the magnitude and speed of global warming. The CGR at Mauna Loa Baseline Observatory reached a record high in 2023. We quantified major components of the global carbon balance for 2023, by developing a framework that integrated fossil fuel CO₂ emissions data and an atmospheric inversion from the Global ObservatioN-based system for monitoring Greenhouse GAses (GONGGA) with two artificial intelligence (AI) models derived from dynamic global vegetation models. We attributed the record high CGR increase in 2023 compared to 2022 primarily to the large decline in land carbon sink (1803 ± 197 TgC year^-1), with mino

SUBMITTER: Gui Y 

PROVIDER: S-EPMC11646126 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature