This paper examines the effects of ocean alkalinity enhancement (OAE) on a key biogeochemical process: the biological carbon pump. The findings suggest that, under the conditions studied, the biological pump will largely remain unaffected by OAE. Gaining insights into how such interventions influence complex oceanographic processes at the ecosystem level is essential for assessing both the efficacy and safety of OAE.

This paper provides a critical evaluation of decadal trends in wetland methane emissions, offering robust insights into how climate change is driving increases in this potent greenhouse gas. By utilizing an ensemble of sixteen models alongside ground-based measurements, the paper provides a robust quantification of emission trends and associated uncertainties. As an international collaboration, this work contributes a comprehensive analysis that not only quantifies recent trends but also identifies temperature as the primary driver, offering essential information for predicting and managing future methane feedbacks.

Assessing the efficiency and durability of marine carbon dioxide removal (CDR) requires the development of clear measurement, reporting, and verification protocols. In this contribution, Michael Tyke presents a path forward into the robust quantification of marine CDR, presenting and explaining how different metrics can be used, providing new tools for modellers, observationalists, and policymakers.