摘要
利用234Th-238U不平衡方法研究南沙群岛海域春季真光层颗粒动力学性质,测定了4个站位水柱中颗粒态有机碳(POC)、溶解态及颗粒态234Th和238U的含量,讨论了各站位水柱中234Th/238U)A.R.的垂直分布。运用稳态箱式模型计算各站位不同水层中溶解态234Th相对于清除至颗粒物的平均停留时间和颗粒态234Th相对于迁出作用的平均停留时间。结合POC/234ThP比值,用两种方法估算出各站位的颗粒态有机碳输出通量分别为8.51—34.94和13.28—50.06mmol.(m2.d)-1。两种方法结果一致,说明234Th是表征POC循环的良好示踪剂。
Particle dynamics in the euphotic zone was studied at four stations in the Nansha Islands sea area during the 2002 spring cruise by the application of ^234Th-^238U disequilibria. The contents of the particulate organic carbon （POC）, ^234Th （dissolved and particulate） and ^238U were determined and the profiles of ^234Th/^238U）A.R. were discussed at the four stations. The profiles of dissolved and particulate 234Th and a steady state box model were used to quantify the dissolved ^234Th scavenging fluxes, particulate ^234Th re moval fluxes and their resident times. According to Poe/TM Thp ratios, the POC export fluxes at the four stations derived from the two different approaches ranged from 8.51 to 34.94 mmol/ ·（m^2·d）^-1 and 13.28 to 50.06 mmol/ ·（m^2·d）^-1, respectively.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2008年第2期64-69,共6页
Journal of Tropical Oceanography
基金
南沙群岛及其邻近海区综合调查,国家海洋局海洋生态系统与生物地球化学重点实验室开放研究基金项目(LMEB200705)
基本科研业务费专项资金项目(海三科200703)
国家资源勘查专项基金项目(118-03-02-02)
