This book chapter advances SDG 14 by explaining the significant change in the exploration, study, and understanding of the oceanography of the Arctic Mediterranean. The first SCISEX cruise with USS Pargo 1993 indicated that the salinity and temperature in the upper layer of the Eurasian Basin were higher than previously reported, while the upper layer salih upward-looking sonars, and when the newly observed thicknesses were compared with those measured 30 years earlier, they indicated that the mean ice thickness had been reduced by about 40%. Suddenly change rather than constancy became the focus, and observations spread over time, which previously had been used to describe the mean circulation and the mean state, now acquired a time dimension.