In general science on page 75, why does the graph show that oxygen content begins increasing with increasing depth, starting at about 500 meters?


Most likely, the main reason is related to water circulation in the ocean. The deep water in the ocean begins at the surfaces of polar areas. It becomes very dense due to the extreme cold temperatures and then sinks to great depths in the ocean. Because it was surface water, it carries dissolved owygen. So the cold, dense, oxygen-filled deep water flows along the ocean floor, causing the oxygen levels there to be slightly higher than the waters above it.

Tags: General Science
Last update:
2017-11-17 18:39
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Jeff
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