New estimates of the storage permanence and ocean co-benefits of enhanced rock weathering.

ABSTRACT: Avoiding many of the most severe consequences of anthropogenic climate change in the coming century will very likely require the development of "negative emissions technologies"-practices that lead to net carbon dioxide removal (CDR) from Earth's atmosphere. However, feedbacks within the carbon cycle place intrinsic limits on the long-term impact of CDR on atmospheric CO₂ that are likely to vary across CDR technologies in ways that are poorly constrained. Here, we use an ensemble of Earth system models to provide new insights into the efficiency of CDR through enhanced rock weathering (ERW) by explicitly quantifying long-term storage of carbon in the ocean during ERW relative to an equivalent modulated emissions scenario. We find that although the backflux of CO₂ to t

SUBMITTER: Kanzaki Y 

PROVIDER: S-EPMC10122414 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature