Jakobshavn Glacier

Since measurements of Jakobshavn Isbrae were first taken in 1850, the glacier has gradually receded, finally coming to rest at a certain point for the past 5 decades. However, from 1997 to 2006, the glacier has begun to recede again, this time almost doubling in speed.

Waleed Abdalati, head of the Cryospheric Sciences Branch at NASA's Goddard Space Flight Center.