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saw5 [17]
4 years ago
14

When El Niño occurs every three to seven years, a mass of warm Pacific water that is usually pushed westward by trade winds Grou

p of answer choices surges back eastward toward South America. becomes much warmer than usual, strengthening trade winds. cools dramatically. sinks and therefore cools substantially. surges northward toward Japan.
Biology
1 answer:
DedPeter [7]4 years ago
7 0

Answer:

"When El Niño occurs every three to seven years, a mass of warm Pacific water that is usually pushed westward by trade winds, <em>surges back eastward toward South America".</em>

Explanation:

Under normal conditions, warm water and air masses move westward, which makes it possible for cold water to ascend in a process known as <u>upwelling</u>. This upwelling occurs in South America´s coasts, providing nutrients from the bottom to the animals, especially fishes -which favors fisheries activities-. Humidity goes straight to the west precipitating in Indochina and North Australia, among other places.

Under <u>El Niño conditions</u>, a tropical stream, that is normally small, acquires strength while the opposite streams debilitate. This <u>avoids warm water to go westward, remaining in South America´s coasts</u>, which produces unusual precipitations in Chile´s coasts -followed by floral bloom in Atacama desert-, and fewer precipitations in Eastsouth Asia and  North Australia. Upwelling does not occur, so there is a fishery crisis because nutrients from the bottom do no ascend and fish populations remain equal or smaller.    

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