What Lies Beneath

Bedrock beneath greenland affects the surface flow, as seen in the slides below from Csatho's presentation in 2006, using the Bamber(2001) data set.

Surface Features in NW Greenland
NW Greenland Bedrock ans surface features

The next three images are from the Bamber(2013) data set, with 100m surface contours superposed on color coded bedrock image. Note how the surface contours have kinks exactly where they cross the deep channels in the bedrock. Since we can see the surface much more clearly than the bedrock, perhaps it may be possible to deduce bedrock features from the surface topo, as Csatho was alluding to. It's quite amazing tthat the ice surface feels the shae of bedrock a kilometer below.

A close up of Nioghalvfjerdsfjorden and Zachariae Isstrom
surface contours over color coded bedrock map in NE Greenland

A close up of Peterman and Humboldt
surface contours over color coded bedrock map in NW Greenland

The same for Jacobshawn
surface contours over color coded bedrock map at Jacobshawn

And I see Hughes(2014) doi:10.5194/tcd-8-2043-2014 has a beautiful view of "Gogineni Gorge" under Jacoshawn

For an idea of how surface is affected by bedrock see Sergienko(2013) doi: 10.3189/2013JoG12J040
Here is Fig 2. effect of bedrock on surface ice features

Other interesting papers are a pair by Lampkin in 2011 doi:10.1029/2010JF001725 and DOI: 10.1002/hyp.8170

The next image is from the second paper:
wavelength range of bedrock undulation expressed on ice surface

Return to Greenland 2013
Return to Greenland 2013 velocity, bedrock and surface