Numerical simulations of a kilometre-thick Arctic ice shelf consistent with ice grounding observations

摘要: Recently obtained geophysical data show sets of parallel erosional features on the Lomonosov Ridge in central Arctic Basin, indicative ice grounding water depths up to 1280 m. These have been interpreted as being formed by an shelf—either restricted Amerasian Basin (the “minimum model”) or extending across entire Basin. Here, we use a numerical sheet-shelf model explore how such shelf could form. We rule out model” and suggest that requires complete cover; this places minimum estimate its volume, which would exceeded modern Greenland Ice Sheet. Buttressing provided increased volumes peripheral terrestrial sheets. An even absence hypothesised East Siberian Ice grounding discovered exceeding 1 km dated penultimate glacial, past shelf. authors undertake simulations shed light formed, dynamics most likely configuration.