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Helis Nunatak (Nunatak Helis \'nu-na-tak 'he-lis\) is a crown-shaped rocky peak of elevation 340 m in Vidin Heights on Varna Peninsula, Livingston Island in the South Shetland Islands, Western Antarctica.
Ice sheet flow into the ocean is increasing and in western Antarctica, the ice stream is draining into the Ross Ice Shelf with marked acceleration.
In particular, the group has been able to observe the melting of the Larsen Ice Shelf, the rapid retreat of ice in western Antarctica, and increased summer melting in northern Canada.