Fig. 4
The East Asia upper-level westerly jet stream index and Tibetan Plateau snow cover index from observations and numerical experiments. a The response of the East Asia upper-level westerly jet stream index to the subseasonal variability of Tibetan Plateau snow cover. b The persistence of the Tibetan Plateau snow cover index. The x-axis represents the number of days lagging the start of each event for the composites or the model initial date. The black line and blue line represent the reanalysis/analysis composites and numerical experiments, respectively. The light blue shading represents the range of the East Asia upper-level westerly jet stream index or Tibetan Plateau snow cover index between the 25th and 75th percentile of the numerical experiment ensembles. The unit is m s−1 or %
