Nature Geoscience, Published online: 09 June 2026; doi:10.1038/s41561-026-02017-x

Sediment records from the eastern equatorial Pacific suggest that deglacial increases in hydrothermal iron release from East Pacific Rise volcanism, enhanced by earlier ice-age sea-level fall, boosted phytoplankton nutrient consumption. The findings point to a possible Earth system feedback linking sea level, mid-ocean ridge volcanism, ocean carbon storage and climate.

Nature Geoscience, Published online: 09 June 2026; doi:10.1038/s41561-026-02001-5

Iron hydride in the Earth’s inner core may exist in a superionic state, according to high-pressure and high-temperature experiments at relevant conditions. Accompanying slow diffusion suggests that the inner core could retain hydrogen on geologic timescales.

Nature Geoscience, Published online: 09 June 2026; doi:10.1038/s41561-026-01982-7

Increased hydrothermal iron inputs from mid-ocean ridges, triggered by ice-age sea-level falls, supported higher surface primary productivity during the last two glacial terminations, according to proxy records of nutrient consumption in the eastern equatorial Pacific Ocean.