Zipfiles are sub-directories of data, to be downloaded and unzipped in a common directory.
Brief explanations of file structures are in the README.md file.
NOTE: Not all Regional Climate Model (RCM) source data is presented here. That data may be acquired by contacting the modeling groups (HIRHAM, MAR, RAMCO) and their associates who are co-authors on the paper.
For those interested, the file "Ice_Layer_Output_Thicknesses.csv" contains the track_name, lat, lon, and ice_thickness of each IceBridge trace where an ice slab was detected in IceBridge Accumulation Radar, 2010-2014. (Figure 2 in the paper.) This is the most-commonly-requested file, so if that's all you need, go there and you needn't bother downloading the rest.