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](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/04/040218_CG_glacier-melting_main.jpg?fit=860%2C460&ssl=1)
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