Question

What unusual event occurs during el niño?

1) the pressure gradient decreases.
2) warm water flows south along the east coast of south america.
3) there is unusually low pressure in the western tr

Answer 1

During an El Niño event, unusually warm water develops in the central and east-central equatorial Pacific, with high air pressure in the western Pacific and low air pressure in the eastern Pacific, impacting global weather patterns.

Step-by-step explanation:

The unusual event that occurs during an El Niño is that a band of unusually warm ocean water develops in the central and east-central equatorial Pacific, including off the Pacific coast of South America. This phenomenon leads to changes in atmospheric pressure, causing high air pressure in the western Pacific and low air pressure in the eastern Pacific. As a result, the normal pressure gradient is reduced, disrupting typical weather patterns and potentially leading to extreme weather events in various regions around the globe. In contrast, the cool phase, known as La Niña, is characterized by cooler than average sea surface temperatures and a different pattern of atmospheric pressure that also impacts global weather, but generally to a lesser extent than El Niño.