Tracking Environmental Change of the Hadal Zone of the Yap Trench: from Variations of Biogeochemical Parameters in the Sediment and Seawater

Haibing Ding1, Yuhuan Huang1, Chaonan Guo2, Jiaohong Niu2, Gehui Li2, ChengJun Sun3 and Guipeng Yang4, (1)Ocean University of China, Qingdao, China, (2)Ocean University of China, Marine Chemistry, Qingdao, China, (3)First Institute of Oceanography, Ministry of Natural Resources, Marine Resources and Environment Research Center, Qingdao, China, (4)Laval University, Quebec-Ocean, Quebec City, QC, Canada