**3. Summary**

Monitoring the snow cover and its components at meso-, regional to global scale is important in order to support weather, hydrological, and climate science, as well as in the monitoring of natural hazards, and the decision-making and formulation of environmental policy. This capability will provide

knowledge-based information on potential impacts to society, economy, and safety (e.g., hydro-power, water availability, transportation, tourism, flooding, avalanches, etc.). Snow is a complex media which is why all aspects such as characterization, sensing, and modeling are important to understand. Our aim was to combine these three aspects together as we believe this will be useful for all disciplines dealing with some part of snow science. Although this is a very small effort, we hope that this will be useful for the scientific community.

#### **Author Contributions:** Writing, review, and editing A.N.A and Z.A.

**Acknowledgments:** We thank all the authors of the published papers in this special issue and we would also like to give a special thanks to the Geosciences and its team for having this special issue and for all their support and patience.

**Conflicts of Interest:** The authors declare no conflict of interest.
