Final answer:
El Nino is the term for the phenomenon in the Pacific Ocean that produces unusually warm ocean temperatures along the west coast of South America and intense summer rains.
Step-by-step explanation:
The term for the phenomenon in the Pacific Ocean that produces unusually warm ocean temperatures along the west coast of South America and intense summer rains is El Nino. El Nino is the warm phase of the El Nino Southern Oscillation (ENSO). During an El Nino event, a band of warm ocean water develops in the central and east-central equatorial Pacific, including off the Pacific coast of South America. This changes weather patterns around the world and can cause extreme weather in certain regions.