摘要：A broad range of Arctic climate and environmental research, including questions on the declining cryosphere and the geological history of the Arctic Basin, require knowledge of the depth and shape of the seafoor1–3 . Bathymetry provides the geospatial framework for these and other studies4 and has impact on many processes, including the pathways of ocean currents and, thus, the distribution of heat5,6 , sea-ice decline7 , the efect of infowing warm waters on tidewater glaciers8 , and the stability of marine-based ice streams and outlet glaciers grounded on the seabed9–11. Bathymetric data from large parts of the Arctic Ocean are, however, not available or extremely sparse due to difculties, both logistical and political, in accessing the region12.
