Linkages Between East China Sea Deep‐Sea Oxygenation and Variability in the East Asian Summer Monsoon and Kuroshio Current Over the Last 400,000 years

The East China Sea (ECS) seasonally receives a high organic input due to the terrestrial matter influx, which is controlled by Asian Summer Monsoon (EASM), and increased productivity driven upwelling of subsurface Kuroshio Current (KC). Changes in benthic foraminiferal assemblage composition combination with paleoceanographic proxy data (CaCO3 (%), TOC δ13Cpf, δ18Obf) are used reconstruct bottom water oxygenation export flux variability over last 400 kyr ECS. Multivariate analyses census identified six biofacies characteristic varying environmental conditions. These results suggest that enhanced EASM precipitation KC directly influenced oxygen content ECS was suboxic during Marine Isotope Stage (MIS) 11 8; dysoxic between MIS 7 6, strongly mid-MIS 5 4, exhibited 3 1. Spectral analysis relative abundances representative genera Quinqueloculina (oxic), Bulimina (suboxic), Globobulimina (dysoxic) reveals robust 23 signal, we attribute precessionally-paced changes surface related past kyr.