Simulated ocean oxygenation during the interglacials MIS 5e and MIS 9e

Abstract

Recent studies investigating future warming scenarios have shown that the ocean oxygen content will continue to decrease over the coming century due to ocean warming and changes in oceanic circulation. However, significant uncertainties remain regarding the magnitude and patterns of future ocean deoxygenation. Here, we simulate ocean oxygenation with the ACCESS ESM1.5 model during two past interglacials that were warmer than the preindustrial (PI) climate, the Last Interglacial (Marine Isotope Stage (MIS) 5e, ∼ 129–115 ka) and MIS 9e (∼ 336–321 ka). While orbital parameters were similar during MIS 5e and MIS 9e, with lower precession, higher eccentricity, and higher obliquity than PI, greenh..