For Himalayan catchment, what are the factors that could affect threshold temperature for a form of precipitation? Is it good to use a single threshold for whole catchment, if not why?
Because I am not studying meteorology so I cannot answer this detail questions. But in my option from geography, meteorology is a very complex branch and we cannot firmly believe what kinds of factors affecting snow rain, we can only raise our own hypothesis and then try to prove it based on previous studies. However, there are certainly many papers and books written by Chinese scholars. I think you can find your answers from their achievements.