| 234Th/238U不平衡法在真光层颗粒动力学研究中的应用 |
| |
| 引用本文： | 陈敏,黄奕普.234Th/238U不平衡法在真光层颗粒动力学研究中的应用[J].地球科学进展,1999,14(4):365-370. |
| |
| 作者姓名： | 陈敏 黄奕普 |
| |
| 作者单位： | 厦门大学海洋系,福建,厦门,361005 |
| |
| 基金项目： | 国家自然科学基金,国家“九五”科技攻关项目 |
| |
| 摘 要： | 真光层是海洋浮游生物活动最为活跃的区域，其间发生的颗粒动力学过程及其机制对于海洋碳的生物地球化学循环有着重要影响，利用放射性核素示踪海洋真光层颗粒动力学过程成为近年来海洋科学的前沿课题。介绍了该领域＾２３４Ｔｈ－＾２３８Ｕ不平衡法的原理、发展历程及其在ＰＯＣ输出通量的估算、沉积物捕集器捕集效率的校正、真光层层化结构的揭示、颗粒活性元素固／液界面分配机制的研究、海洋胶体性质的研究及近岸海域悬浮颗粒活
|
| 关 键 词： | 真光层 颗粒动力学 234Th-238U不平衡 |
PARTICLE DYNAMICS IN EUPHOTIC ZONE ELUCIDATED FROM 234TH/238U DISEQUILIBRIA: A REVIEW |
| |
| CHEN Min,HUANG Yipu.PARTICLE DYNAMICS IN EUPHOTIC ZONE ELUCIDATED FROM 234TH/238U DISEQUILIBRIA: A REVIEW[J].Advance in Earth Sciences,1999,14(4):365-370. |
| |
| Authors: | CHEN Min HUANG Yipu |
| |
| Institution: | Department of Oceanography,Xiamen University,Xiamen 361005,China |
| |
| Abstract: | Euphotic zone is the most active region for marine organism activities. The particle dynamic processes and their regulation in euphotic zone have great effect on marine biogeochemical cycle of carbon. The study of particle dynamics by radionuclides had become a popular program in international marine science studies. In this paper, we described the principle and development of particle dynamics in euphotic zone via 234 Th 238 U disequilibria. This parent daughter pair tracer can be applied to many aspects of oceanography, such as the estimation of POC export flux, the calibration of the capture efficiency of sediment trap, the elucidation of the stratified structure, the particle/solution distribution of particle reactive elements, the study of marine colloids and the prediction of the fate of pollutants in coastal ecosystems. In addition, we summarized the research progress of the particle dynamics in our country. In the future research, we should expand the application of 234 Th/ 238 U disequilibria in marine research, especially in the study of marine colloids dynamics and organic pollutants. On the other hand, more applied research needs for a better understanding of the biogeochemistry of marine particles, especially by using new tracers or multi tracer approaches, such as 210 Po/ 210 Pb disequilibria, 228 Th/ 228 Ra disequilibria and some biomarkers. |
| |
| Keywords: | Euphotic zone Particle dynamics 234 Th/ 238 U disequilibria South China Sea Export production Xiamen Bay |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地球科学进展》浏览原始摘要信息 |
| 点击此处可从《地球科学进展》下载免费的PDF全文 |
|
