The Figure shows a 3-D perspective of flow during the Indian Monsoon in June 1988. The fields are from the GEOS-1 data assimilation system. The view is from the South Indian Ocean looking north. The Indian subcontinent is in the center and Maylasia is to the right and Africa to the left.
High topography is in brown and lower elevations are green.
The arrows show near-surface winds. The strong winds blowing from Africa, south of Arabia and onto the western shore of Indian represent the Somali jet. This wind current brings moist sea air into the subcontinent. The yellow and blue ribbons are two air parcel trajectories. They show that air of maritime origin from the eastern Indian Ocean and western Pacific, as well as air descending over Arabia converge in the Somali jet.