The snow line, also known as the snow line or frost line, refers to the elevation above which snow and ice remain present year-round. This line can be found on mountains and glaciers, and represents the boundary between areas that are glaciated and those that are not. Research on the snow line involves studying the factors that influence its location and variability, such as climate change, precipitation patterns, and topographical features. Scientists also investigate how changes in the snow line can impact ecosystems, water resources, and the overall environment. This research is important for understanding and predicting the effects of climate change on mountain regions and the Earth's hydrological cycle.