- Physical properties of summer sea ice in the Pacific sector of the Arctic in 2008-2018(2020-05-01) Qingkai Wang; Peng Lu; Matti Leppäranta; Bin Cheng; Zhijun Li; Dalian University - Qingkai Wang; Dalian University - Peng Lu; University of Helsinki - Matti Leppäranta; Finnish Meteorological Institute - Bin Cheng; Dalian University - Zhijun Li