This is confirmed by gravity satellite measurements over the past 9 years which find that the rate of ice mass loss has doubled over the last 9 years. (skepticalscience.com)
They investigated using different parameter values in the model and exploring the variation in the result and found a great deal of variation in ice mass loss rates was possible. (antarcticglaciers.org)
So we see a long term trend of accelerating ice mass loss since the 1970s. (skepticalscience.com)