Question

Which is expected to happen during El Niño?

A. There is unusually low air pressure over the western tropical Pacific.

B. The pressure gradient decreases.

C. Upwelling along the west coast of South America increases.

D. The trade winds strengthen.

Answer 1

The answer is B. The pressure gradient decreases

Answer 2

An unusually low air pressure over the western tropical Pacific is expected to happen during El Niño. Hence, option A is correct.

What is El Niño?

El Niño is a condition wherein the surface of the ocean becomes warmer. This unusual change in the temperature of the surface of the ocean is because of the moistening of the overlying air.

When an El Niño effect takes place in a region, the air pressure that generally comes over the western pacific decreases to much lower levels than usual.

Hence, option A holds true regarding El Niño.

Learn more about El Niño here:

https://brainly.com/question/18307318

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