The study looked at how different methods of determining if precipitation is snow or rain affect snow accumulation and melt in different regions. They used a snowpack model and found that sites with more precipitation around 0-4°C were most affected by the method used. In warmer areas, the choice of method led to big differences in snowfall amounts and timing of snowmelt, while colder sites were less sensitive to the method. This has important implications for how we model snow water storage and land surface reflectivity in areas where snow is a big part of the landscape.