Melting of ice in central Greenland is being accelerated by the heat of molten rocks rising from the core–mantle boundary, adding to sea-level rise, a study has found. Researchers from Japan mapped out the extent and branches of the so-called 'Greenland plume' — the rising flow of molten rock ascending beneath the island.
Geothermal activity is abundant in the North Atlantic region. Iceland and the Norwegian island of Jan Mayen have active volcanoes with their own mantle plumes.