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This paper indicates that there is a maximum value of vertical distribution of dissolved oxygen in the South China Sea in summer, and that this maximum value in summer derives mainly from winter. A similar reservation occurs also in temperature under the thermocline. Above and below the depth of the oxygen maximum, the oxygen content is decreased by an increase of temperature, the biological respiration and the decomposition of organic matter respectively. The oxygen maximum usually occurs above 50 meters in depth where the phytoplankton presents in small amounts. The phytoplankton is only an influentical factor for the oxygen maximum, not a decisive one. 相似文献
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