oggm.tasks.compute_velocities(gdir, glen_a=None, fs=None, filesuffix='')[source]

Surface velocities along the flowlines from inverted ice thickness.

Computed following the methods described in Cuffey and Paterson (2010) Eq. 8.35, pp 310:

u_s = u_basal + (2A/n+1)* tau^n * H

In the case of no sliding:

u_z/u_s = [n+1]/[n+2] = 0.8 if n = 3.

The output is written in ‘inversion_output.pkl’ in m yr-1

You’ll need to call prepare_for_inversion with the add_debug_var=True kwarg for this to work!

Parameters: gdir : Glacier directory with_sliding : bool default is True, if set to False will not add the sliding component. filesuffix : str add a suffix to the output file

Notes

Files writen to the glacier directory:
inversion_output.pkl
List of dicts containing the output data from the inversion.