Nioghalvfjerdsbrae


Nioghalvfjerdsbrae, sometimes referred to as "79 N Glacier", is a large glacier located in King Frederick VIII Land, northeastern Greenland. It drains an area of of the Greenland Ice Sheet with a flux of per year, as measured for 1996.

History

This glacier was named by the ill-fated Denmark expedition 1906-1908 because it lies at a latitude of 79°. The name had been meant to be temporary, but it acquired a new significance when it was deemed to be the place where expedition leader Ludvig Mylius-Erichsen, as well as cartographer Niels Peter Høeg Hagen, had died according to Jørgen Brønlund's diary.
Since 1990 Greenland's longest persistent supraglacial stream runs on the glacier, 73 km long in 2011, 71 km in 2017. The width of the stream remains relatively constant over most of the length ranging from 20-35 m.
In August 1997 the southern calving front retreated by 5 km with no significant upstream thinning.

Geography

The terminus of the glacier is in the Nioghalvfjerd Fjord, south of the Dijmphna Sound. The fjord and the glacier form the southern limit of Crown Prince Christian Land.
The glacier has had an 80 km long and 20 km wide floating tongue, widening toward its terminus north of Lambert Land. There are two calving fronts where the glacier meets the ocean, separated by Hovgaard Island.