Late to middle Pleistocene Arctic glacial history implied from a sedimentary record from the Northwind Ridge

Linsen Dong1, Yanguang Liu2, Xuefa Shi3 and Aimei Zhu1, (1)the First Institute of Oceanography, State Oceanic Administration, Qingdao, China, (2)First Institute of Oceanography, State Oceanic Administration, Qingdao, China, (3)First Institute of Oceanography, Ministry of Natural Resources, Key Laboratory of Marine Geology and Metallogeny, Qingdao, China