oceans 2

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1
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what is southern oscillation

An atmospheric-ocean phenomenon in which trade winds begin to oscillate in the equatorial Pacific. this causes warm water to shift across the Pacific and changes upwelling patterns on the west coast of South America.

2
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what is El Nino

An effect of Southern Oscillation that causes warm water currents to flow eastward from the central Pacific, preventing upwelling conditions that disrupt the food chain of local animals. this causes fish to migrate, leaving poor fishing conditions.

3
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what is El Nina

An effect of Southern Oscillation that results in the return of good fishing conditions due to upwelling habits returning to normal and wetter conditions over Oceania

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water depth is directly related to what 

plate boundaries or lack thereof 

5
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