An oceanic carbon sink refers to the process by which the ocean absorbs and stores carbon dioxide (CO2) from the atmosphere, helping to regulate global carbon levels. This natural mechanism plays a critical role in mitigating climate change by reducing the concentration of CO2, which is a greenhouse gas, in the atmosphere. The ocean acts as a significant reservoir for carbon, primarily through biological processes, such as photosynthesis by marine phytoplankton and the subsequent sinking of organic matter.
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