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１９９４年８月和１９９５年２月在台湾海峡对ＤＯＣ作定点连续观测，发现ＤＯＣ日变化很大（２～４ｍｇ／ｄｍ３），且变化的幅度有季节差异和空间差异；ＤＯＣ昼夜变化的总的规律是白天比晚上高，夜晚始终处于低值；依据ＤＯＣ的昼夜变化可将ＤＯＣ分为ＤＯＣｎｅｗ和ＤＯＣｏｌｄ两部分；Ｄ０Ｃｎｅｗ在真光层中快速地产生、消耗、再循环；ＤＯＣｏｌｄ则相对稳定，可从真光层底部输出；ＤＯＣ的快速变化表明ＤＯＣ的产生和被细菌消耗利用的速度都非常快．文中还尝试快速富丽叶变换（ＦＦＴ）来分离引起ＤＯＣ日变化的物理因子和生物因子，并依据实验结果讨论了初级生产力，微生物对ＤＯＣ的利嵱茫模希檬涑錾Φ任侍狻
In August 1994 and February 1995 in Taiwan Strait DOC for continuous observation and found that DOC diurnal variation (2 ~ 4mg / dm3), and the rate of change with seasonal differences and spatial differences; DOC diurnal changes in the total The law is that the daytime is higher than the evening and the night is always at a low value. DOC can be divided into DOCnew and DOCold according to diurnal changes of DOC. D0Cnew is rapidly generated, consumed and recycled in the true light layer. DOCold is relatively stable, The bottom of the true light layer output; DOC rapid changes indicate that the DOC production and use of bacteria are very fast. In this paper, we also try fast Fourier transform (FFT) to separate the physical and biological factors that cause the diurnal changes of DOC. Based on the experimental results, we discuss the primary productivity and the microbiological influence on DOC. Modulo 涑 錾 Φ