Platelet Ice under Arctic Pack Ice in Winter Journal Article uri icon

Overview

abstract

  • The formation of platelet ice is well known to occur under Antarctic sea; ice, where sub-ice platelet layers form from supercooled ice shelf; water. In the Arctic however, platelet ice formation has not been; extensively observed and its formation and morphology currently remain; enigmatic. Here, we present the first comprehensive, long-term in situ; observations of a decimeter thick sub-ice platelet layer under; free-drifting pack ice of the Central Arctic in winter. Observations; carried out with a remotely operated underwater vehicle (ROV) during the; midwinter leg of the MOSAiC drift expedition, provide clear evidence of; the growth of platelet ice layers from supercooled water present in the; ocean mixed layer. This platelet formation takes place under all ice; types present during the surveys. Oceanographic data from autonomous; observing platforms lead us to the conclusion that platelet ice; formation is a widespread but yet overlooked feature of Arctic winter; sea ice growth.

publication date

  • May 19, 2020

has restriction

  • closed

Date in CU Experts

  • June 28, 2021 10:04 AM

Full Author List

  • Katlein C; Mohrholz V; Sheikin I; Itkin P; Divine DV; Stroeve JC; Jutila A; Krampe D; Shimanchuk E; Raphael I

author count

  • 24

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