Monsoon dynamics are influenced by several factors, including the Madden-Julian Oscillation (MJO), cyclonic circulations, and moisture availability. The MJO, a large-scale atmospheric phenomenon, can affect rainfall patterns by altering wind and moisture conditions. Cyclonic circulations, such as those over the North Bay of Bengal, can lead to localized increases in rainfall intensity. These factors often determine which regions experience active monsoon conditions and which face deficits.