第174期同位素论坛时间为2021年5月7日9：00，地点为周隆泉楼A3-206。
本期论坛主持人为吕炳辰，共有3人作报告（王易向导师申请延后至6.4日报告）：
张琨：
Uptake of New and Regenerated Forms of Nitrogen in Cosmonaut Sea
1. faverage= 0.86±0.10, RPINO3<1, RPINH4>1, Regenerated Nitrogen contribute more.
2. Compared with other sea areas，Astronauts Sea has a relatively low uptake rate of ammonium ,can be thought of a high ƒ ratio area with low production .
赵秀峰：
Particle dynamics of 210Po and 210Pb based on multi-season investigations in the South China Sea and the Western Pacific
1. Differences in paticle activitiy between 210Po and 210Pb.
2. Modelled sinking velocity of 210Po.
3. Carbon fluxes based on 210Po and 210Pb disequilibrium.
陈金旭：
The freshwater components of water masses in the Prydz Bay based on oxygen isotope study
1. Study area and method.
2. Temporal variation of T/S/δ18O in different water masses.
3. Result of the freshwater components in different water masses.
4. Difficulties and deficiencies.
欢迎各位积极参加！
