Striped icebergs. Preliminary discussion on the respective roles and positionings of sea ice, marine ice, glacier ice and ice shelf

We offer a few comments on the formation of striped icebergs. We discuss the different types of ice as distinguished by the authors: glacier ice, ice shelf, marine ice, sea ice. We rely on the hypothesis exposed in Guy (, 2022): the planar and columnar structures characterizing such icebergs result from the fingered solidification of sea water under the iceshelf ice (instability of the planar freezing front due to constitutional supercooling). We propose to separate marine ice into two types:-type 1-marine ice, restricted to ice formation by nucleation within the water beneath the ice shelf;-type 2-marine ice, for the fingered ice formed at the ice-water front below the ice shelf. The complete succession of zones may thus comprise, from top to bottom: glacier ice / type 2-marine ice / type 1-marine ice / seawater. Some results from the article by Warren et al. (JGR Oceans, 124, 2019) are discussed.