PARTICLE DYNAMICS IN EUPHOTIC ZONE ELUCIDATED FROM 234TH/238U DISEQUILIBRIA:A REVIEW
Received date: 1998-11-20
Revised date: 1999-01-22
Online published: 1999-08-01
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 234Th-238U 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 234Th/238U 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 210Po/210Pb disequilibria,228Th/228Ra disequilibria and some biomarkers.
CHEN Min, HUANG Yipu . PARTICLE DYNAMICS IN EUPHOTIC ZONE ELUCIDATED FROM 234TH/238U DISEQUILIBRIA:A REVIEW[J]. Advances in Earth Science, 1999 , 14(4) : 365 -370 . DOI: 10.11867/j.issn.1001-8166.1999.04.0365
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