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The El Niño-Southern Oscillation

Question 31

Multiple Choice

The El Niño-Southern Oscillation


A) occurs every year around Christmas time in the southern Pacific Ocean.
B) is a periodic shift of high and low pressure zones over the western and eastern Pacific, respectively, usually occurring every 2 to 12 years.
C) is a pattern of sea surface, air pressure, and wind shifts between the northern and tropical western Pacific.
D) A north-south fluctuation of high and low pressure zones in the North Atlantic Ocean.

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