Holocene Monsoon Weakening Drives Arabian Sea Deoxygenation

A Holocene monsoon weakening drives Arabian Sea deoxygenation, a study showing how wind reduction reshaped ocean structure. The research, led by Saravanan, Thirumalai, Li and colleagues and published in Communications Earth & Environment in 2026, links the gradual monsoon weakening over the last 11,700 years to intensified stratification and reduced oxygen in deeper waters, affecting marine habitats and regional climate. The team reconstructed past conditions using sediment cores and geochemical proxies, including isotopic ratios, trace metals, and organic biomarkers, supported by climate modeling to explain the observed hydrographic evolution and productivity patterns.