Rainfall in the tropical Pacific is also related to SST patterns. There are reasons for this relationship. The higher the SST, the greater the rate of evaporation of seawater and the more vigorous the atmospheric convection. Consequently, during neutral conditions, rainfall is greatest in the western tropical Pacific where SST are :

Consequently, during neutral conditions, rainfall is greatest in the western tropical Pacific where SST are: highest.

Explanation:

SST is the abbreviation for Sea Surface Temperature. This temperature is measured using satellite data and is essential to understand the occurrence of precipitation in the tropical pacific, as shown in the question above. This is because the higher the surface temperature of the sea, that is, the higher the SST, the higher the rate of evaporation of sea water. According to the water cycle, when sea water evaporates, it is released into the atmosphere as water vapor. This vapor is captured by the clouds, which condense it, transforming it into water again. When the clouds become very heavy with this condensed water, precipitation will occur, which is the release of clouds from water that was previously evaporated from the sea, due to the high temperature of the sea surface. Therefore, we can conclude that when precipitation in the Western Tropical Pacific is higher, it means that SST is higher.