Paper 8: Changes in the Arctic Ocean: Knowledge gaps and Impact of future satellite missions for the Arctic Ocean (Relevant to all ASCs). To be submitted to Journal of Remote Sensing by S. Lucas, J. A. Johannessen, M. Cancet, L. H. Pettersson, I. Esau, J. Rheinlaender, F. Ardhuin, B. Chapron, A. Korosov, F. Collard, S. Herlédan, E. Olason and C. Donlon.