This study investigates the variations in precipitation phases on the Tibetan Plateau(TP)from 1979 to 2020.Utilizing the Third Pole region's high-resolution(1/30°,daily)surface meteorological data(TPMFD)and a method based on elevation and meteorological conditions,we analyzed the snowfall-precipitation ratio(SPR)spatiotemporal characteristics on the TP.Key findings include:①Significant spatial differences in SPR,with higher values in the west and lower in the east.② An overall downward trend in SPR,decreasing at an average rate of 1.11%per decade(p<0.001).③ Both cold and warm seasons exhibit increases in rainfall and decreases in snowfall and SPR.However,the rates of change are more pronounced in the warm season.④ Snowfall is comparable in the cold and warm seasons in the east and west of the plateau.In contrast,the central plateau experiences predominant snowfall during the warm season.About 90%of the annual rainfall occurs in the warm season,and the proportion of warm season snowfall to annual snowfall is decreasing(-0.29%per decade)in most plateau regions.These findings provide valuable insights for regional climate change and water science research.
维普
万方数据