Kohen Bauer

Abstract Sinking macroalgal biomass carbon to the deep seafloor has been proposed as a means of removing atmospheric carbon dioxide, but the persistence of this carbon and its ecological impacts remain poorly constrained. Here, we present results from a year-long in-situ experiment in the Northeast Pacific oxygen minimum zone, where kelp was deployed and monitored with high-resolution time-lapse imaging.

Abstract Pyrite formation and burial in anoxic ocean environments helps to regulate the acid–base balance of the oceans. Despite its potential importance, the impact of this anoxic alkalinity production on the global carbon cycle and Earth’s long-term climate regulation has been largely overlooked.

Abstract Sulfur is a critical component of Earth’s surface evolution owing to its dynamic roles as a redox buffer and nutrient as well as forming the basis for some of Earth’s earliest metabolisms. In this Review, we provide a broad-scale reconstruction of the biogeochemical sulfur cycle and its evolution through time.