Thank you for this link. The accompanying Nature article is [1].

As I mentioned elsewhere in this thread, the study linked in the OP has been in conflict with other measurements. The article you reference is one attempt to synthesize the three measurements available (altimetry from SAR, surface flow rate from imagery, and mass change from gravimetric observations) into a complete picture.

[1] https://www.nature.com/articles/s41586-018-0179-y.epdf?autho...