The sea surface temperature and subsurface temperature variation in the core region of the Western Pacific Warm Pool over the last four glacial cycle

Shuai Zhang, Hohai University, Institute of Marine Geology, College of Oceanography, Nanjing, China, Tiegang Li, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China, Yiquan Qi, Hohai University, College of Oceanography, Nanjing, China and Fengming Chang, Institute of Oceanology, Chinese Academy of Sciences, Key Laboratory of Marine Geology and Environment, Qingdao, China