01 May '11, 4pm

Ice scientists goin' #ROGUE on their way to Greenland!

After arriving in Kangerlussuaq, Greenland (fingers crossed for tomorrow!), it will be another couple days of sorting cargo before we continue on to our science camp on the ice sheet. Once in the field, our primary objective is to install eight GPS stations on the ice sheet to measure how fast the ice is flowing towards the ocean. (It’s a bit like a GPS receiver in a car, but in this part of Greenland the ice flows about a foot per day, so we require receivers with much higher accuracy!) In particular, we are curious about how the speed of the glacier changes throughout the year. Previous measurements have shown that parts of the Greenland Ice Sheet speedup a lot in summer when the snow and ice on the surface melt a lot. Meltwater that reaches the bottom of the glacier through vertical shafts called moulins will lubricate the bed, causing the ice to slip over the rock faster

Full article: http://earthobservatory.nasa.gov/blogs/fromthefield/2011/...

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