SCIN 136 FORUM 3in Science by Islandbuilt
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If all oxygen in seawater comes either from exchange with the atmosphere or from photosynthesis by phytoplankton in the euphotic zone, how do you explain that there is sufficient dissolved oxygen throughout the water column, even at the greatest depths, except in highly unusual locations? In other words what factors are responsible for the distribution of dissolved oxygen in the oceanic water column?