Radiocarbon Isotope Dating Methods
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The time scale for seawater migration is indicated by the 14C dating method of total carbonic acid in seawater. This provides the basis for the 1500-year time scale of the deep circulation.
It has been estimated that most dissolved organic matter in the ocean is persistent, but we would like to know just how much of it is not decomposed. This question is answered by the 14C dating method of dissolved organic carbon in seawater.
The average age based on the 14C dating method for the DOC in the deep North Atlantic is 4,000 years, while in the North Pacific, it reaches 6,000 years. The difference is 2,000 years. This is longer than the time of deep circulation (1,000 to 1,500 years). Let us consider this reason.
The clue is that particulate organic matter that has just been produced, and dissolved organic matter that has just been produced by the decomposition of particulate organic matter will decompose at a faster rate.
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