write the dominant features of indian monsoon??

A phenomenon associated with the monsoon is its tendency to have ‘breaks’ in rainfall which is attributed to the variations in temperature and pressure gradient. That causes its wet and dry spells. These breaks in monsoon are related to the movement of the monsoon trough. For various reasons, the trough and its axis keep on moving northward or southward, which determines the spatial distribution of rainfall. When the axis of the monsoon trough lies over the plains, rainfall is good in these parts. On the other hand, whenever the axis shifts closer to the Himalayas, there are longer dry spells in the plains, and widespread rain occur in the mountainous catchment areas of the Himalayan rivers . The depressions follow the axis of the “monsoon trough of low pressure”. Thus, the variations in temperature and pressure causes irregularity in its arrival and retreat.