EARTH SCIENCE
OCEANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Upwelling replaces sand and gravel on beaches lost as the result of wave and tidal action.
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Upwelling decreases the temperature differences between different layers of ocean water.
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Upwelling cycles nutrients from decomposers along the ocean floor to producers in surface waters.
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Upwelling returns salt to the surface from the benthic zone as part of the global conveyor belt current.
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Detailed explanation-1: -Upwelling brings those lost/sunk nutrients back to the surface, which creates “blooms” of algae and zooplankton, which feed on those nutrients. These blooms then become feeding grounds for plankton feeders, then fish etc, sustaining ocean life that lives near the surface.
Detailed explanation-2: -Because the deep water brought to the surface is often rich in nutrients, coastal upwelling supports the growth of seaweed and plankton. These, in turn, provide food for fish, marine mammals, and birds. Upwelling generates some of the world’s most fertile ecosystems.
Detailed explanation-3: -Upwelling is an oceanic process in which cold water from the deep rises toward the surface of the ocean. It is caused by strong winds and the rotation of the Earth which moves warmer surface waters offshore allowing the cold, nutrient rich water to rush up.
Detailed explanation-4: -Upwelling is an oceanographic phenomenon that involves wind-driven motion of dense, cooler, and usually nutrient-rich water from deep water towards the ocean surface. It replaces the warmer and usually nutrient-depleted surface water.
Detailed explanation-5: -Sea life is concentrated in the sunlit waters near the surface, but most organic matter is far below, in deep waters and on the sea floor. When currents upwell, or flow up to the surface from beneath, they sweep vital nutrients back to where they’re needed most.