Question

what are the mechanism of monsoon

Answer 1

In the case of the monsoon, the cause is primarily orographic, due to the presence of highlands in the path of the winds. ... The relevant features in explaining the monsoon mechanism are as follows: The presence of abundant water bodies around the subcontinent: the Arabian Sea, Bay of Bengal, and Indian Ocean.

Answer 2

The differential heating and cooling of land and water creates low pressure on the land mass of India while the seas around experience comparatively high pressure. The shift of the position of the intertropical convergence zone in summer over the Ganga plain
The presence of high pressure area east of Madagascar approximately at 20*s over the Indian ocean . The intensity and position of high pressure area after the Indian monsoon