Seafloor map shows why Greenland’s glaciers melt at different rates

Deep seafloor troughs allow warm water to eat away at the ice from below, speeding shrinkage

Køge Bugt

RAPID RETREAT  New seafloor data reveal that Køge Bugt (shown) and other fast-retreating glaciers in southeastern Greenland sit within deep fjords, allowing warm Atlantic Ocean water to speed up melting.

Laurence Dyke

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