The NUNAIT calculator

The NUNAtak Ice Thinning (NUNAIT) calculator is an easy-to-use MATLAB/Octave tool that constrains parameters describing the geological history of a nunatak from a set of surface exposure ages.

Graphical description of the model

The NUNAIT model generates vertical profiles of apparent exposure ages based on given parameter values (erosion rates, uplift rate, and current and maximum ice elevations) assuming that the ice surface has changed parallel to the climate proxy data.

Fitting types

There are four ways of fitting the model to the data:

  • 0: normal fitting.
  • 1: minimum apparent ages. E.g. for nunataks with inhomogeneous erosion rates.
  • 2: maximum apparent ages. E.g. for datasets containing boulders with variable inherited signals.
  • 3: no fitting, used for testing purposes. E.g. generating expected profiles before sampling.


A full description of the calculator is available at:

Rodés, Á. (2021) The NUNAtak Ice Thinning (NUNAIT) Calculator for Cosmonuclide Elevation Profiles. Geosciences 11, no. 9: 362. doi:10.3390/geosciences11090362

How-to & code

The calculator can be downloaded from


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: