Abstract
The term ``break`` is traditionally applied only to dry spells occurring after the monsoon onset in the region. Simply put, the daily rainfall of the monsoon is paused over the region, for a few days, called a “break spell.” The researchers have suggested that the standardized anomalies of three consecutive days of rainfall should prevail to categorize the active and break spells. This study examined break spells and active spells on the inter-annual, intra-seasonal, and decadal scales by examining the frequency and spatial distribution of daily rainfall occurrences of different intensities linked to break and active events over the mainland Indochina region. The difference in the vertical meridional circulation between the active spells with moist convection and intense break events with heat through circulation was explained by various atmospheric parameters. La Niña encourages more break days than active days, and the distinction in vertical meridional circulation between intense break events with a heat trough type circulation and active spells with moist convection is crucial for developing suitable prediction tools.