Greenland without its ice sheet
The Greenland ice sheet (GISh) is 2,500 km north-south, 1,000 km east-west, 3 km thick, and covers almost 2 million square kilometers (or 80% of the island). Because of the weight of GISh, the continental lithosphere is depressed in an elastic motion. If the GISh were to be removed, the lithosphere would rise in reaction. This rebounding process is known as isostasy and in [...]
First Visit to North Greenland – II
Our science mission on Monday, May 9th involved flights over the north and northwest of Greenland, specifically the Steensby, Ryder and Hagen glaciers as well as the Fald Ice Cap in Kronprins Christian Land. The Steensby Glacier passes through the Sherard Osbron Fjord, while the Ryder Glacier is constrained by the Victoria Fjord. This was my [...]
First Visit to North Greenland – I
After a five-hour flight from Baltimore Washington International Airport, I landed at the Thule Air Base in northwestern Greenland as part of Columbia University’s team in NASA’s Operation IceBridge (OIB). The program is a six-year campaign of annual flights to each of Earth’s polar regions that began in the Fall of 2009. The flights in March and [...]
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