Data format
column 1: latitude in degrees
column 2: longitude in degrees
column 3: surface elevation change rate in m/yr (negative rate denotes thinning)

When using this data please reference the following paper:

Kjeldsen, K. K., S. A. Khan, J. Wahr, N. J. Korsgaard, K. H. Kjær, A. A. Bjørk,
R. Hurkmans, M. R. van den Broeke, J. L. Bamber, and J. H. van Angelen,
Improved ice loss estimate of the northwestern Greenland Ice Sheet, 
Journal of Geophysical Res., doi:10.1029/2012JB009684, 2012.

For additional information or surface change rates for other areas please contact: 
abbas@space.dtu.dk
Shfaqat Abbas Khan