Figure 4
HYSPLIT moisture source allocation. (a–c) HYSPLIT clustered 120-h backward wind trajectories. The colormap at the top signifies specific humidity and moisture carried by the clustered mean trajectory. The numbers in bracket signify the frequency of trajectories in a cluster as well as the percentage of moisture transported along the respective clustered trajectory. The inset at top left represents the same plot but for height vs latitude variations. This highlights the role of Shillong Plateau as an orographic barrier in blocking oceanic winds. The inset at bottom right indicates monthly variation in moisture source contribution. (d–f) The monthly climatological wind maps derived at 850 hPa during 1979–2018. The wind maps indicate changing wind direction and strength during each season.
