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厦门湾水体中2 3 4 Th 2 3 8U不平衡的时间序列数据表明 ,无论是溶解态、颗粒态2 3 4 Th还是总2 3 4 Th ,相对于母体2 3 8U均严重亏损 ,呈现出与开阔大洋水明显不同的特征。溶解态、颗粒态2 3 4 Th的停留时间介于 0 .5— 41d之间 ,其中低潮时停留时间比高潮时小 2— 4倍 ,证实近岸海域具有强烈的清除、迁出作用 ,且潮汐变化对海域颗粒动力学特征有重要影响。2 3 4 Th停留时间与总悬浮颗粒物浓度 (TSM)、Chl.a的关系则表明 ,近岸海域元素的清除、迁出作用主要受陆源颗粒物输送的影响 ,与生物活动关系并不密切。此外 ,非稳态与稳态清除模型结果的对比证明 ,稳态模型对于具有强烈清除、迁出作用的近岸海域是适用的
The time series data of 2 3 4 Th 2 3 8U imbalances in the water of Xiamen Bay show that both the dissolved state, the particle state of 2 3 4 Th, and the total of 2 3 4 Th, all show a serious loss compared with the maternal 238U, Significantly different characteristics of open ocean water. In the dissolved state, the residence time of 2 3 4 Th in the granular state ranged from 0.5 to 41 days, of which the residence time at low tide was 2-4 times smaller than that at the climax, confirming the intensive removal and removal of the coastal waters Tidal changes have an important influence on the particle dynamics of the sea. The relationship between the residence time and total suspended particulate concentration (TSM) and Chl.a shows that the removal and removal of elements from coastal waters are mainly affected by the transport of terrestrial particulate matter and are not closely related to biological activities. In addition, the comparison between the unsteady and steady-state models shows that the steady-state model is suitable for coastal waters with strong removal and removal