How is this for a feedback loop? Ice sheets build up during a glaciation lowering global sea level → reduced water load leads to increased mid ocean ridge volcanism after a 10-20 kyr lag → volcanism releases iron in the ocean → iron causes plankton blooms → atmospheric CO₂ goes down → ice sheets build up #ClimateChange #IceSheets #SeaLevel https://www.nature.com/articles/s41561-026-01982-7