Comparison between compressed and uncompressed granular water-ice samples. Top: Number of detected particles for compressed (VFF 56%) and uncompressed (VFF 31%) granular water ice as a function of time after the start of insolation. Bottom: Surface images of the uncompressed (top images) and compressed (bottom images) granular water-ice samples at the beginning of the insolation phase (left images) and after 96 minutes of illumination (right images).