IBCAOv4
Version 4 of IBCAO is available for download in the form of a bathymetric grid for the Arctic region.

Jakobsson, M., Mayer, L. A., Bringensparr, C., Castro, C. F., Mohammad, R., Johnson, P., et al. (2020). The International Bathymetric Chart of the Arctic Ocean Version 4.0. Scientific Data, 7(1), 1–14. https://doi.org/10.1038/s41597-020-0520-9