Increasing Hypoxia in the Changjiang Estuary During the Last Three Decades Deciphered from Sedimentary Redox-sensitive Elements

Yijing Wu1, Daidu Fan1, Deli Wang2 and Ping Yin3, (1)State Key Laboratory of Marine Geology, Tongji University, Shanghai, China, (2)Xiamen University, State Key Laboratory of Marine Environmental Sciences, Xiamen, China, (3)Qingdao Institute of Marine Geology, China