中文摘要：

在 ²¹⁰ Po 和 ²¹⁰ 上面的水和他们的潜在的应用里的 Pb 在南部的海洋(车站 IV3 ) 和华南海(NS44 ) 作为粒子出口和矿化作用的一个代理被检验。²¹⁰ Po 是表面水里的赤字但是相对 ²¹⁰ 表面下的水里的 Pb。在 ²¹⁰ Po 和微粒器官的碳(停靠港)显示了 ²¹⁰ Po 源于微粒有机物( POM )出口和矿化作用分别地，它被减少的δ ¹³ C 和增加的δ ¹⁵ N 向下由于粒子矿化作用。根据 ²¹⁰Po/²¹⁰ Pb 盒子模型，从表面水的停靠港出口流动是 1.2 mmol C · m ⁻² · d ⁻¹ 和 2.3 mmol 为车站 NS44 和 IV3 的 C · m ⁻² · d ⁻¹ 分别地。在表面下的水里， ²¹⁰ Po 是 0.062 Bq · m ⁻² · d ⁻¹ 和 0.566 Bq ·为与 52 ± 2 的 recycle 效率一起的车站 NS44 和 IV3 的 m ⁻² · d ⁻¹6% 和 119 ± 5 2% 分别地。POM 的重新使矿物化的流动源于 ²¹⁰ Po 和出口停靠港是 0.6 mmol C · m ⁻² · d ⁻¹ 和 2.7 mmol C 为 NS44 和 IV3 的· m ⁻² · d ⁻¹ 。这研究建议了那 ²¹⁰ Po 是粒子出口和矿化作用的强大的 tracer。

英文摘要：

Disequilibria between ^210Po and ^210Pb in the upper water and their potential applications as a proxy of particle export and remineralization were examined in the Southern Ocean （station IV3） and the South China Sea （NS44）. ^210po was deficit in surface waters but excessive relative to ^210Pb in subsurface waters. Good positive correlation between ^210Po and particulate organic carbon （POC） indicated deficits and excess of ^210Po resulted from particulate organic matter （POM） export and remJneralization respectively, which was also supported by the decreased δ^13C and increased δ^15N downwards as a result of particle remineralization. On the basis of ^210Po/^210Pb box-model, POC export flux out of the surface waters were 1.2 mmol C. m^-2. d^-1 and 2.3 mmol C. m^-2. d^-1 for station NS44 and IV3, respectively. In the subsurface waters, remineralization fluxes of ^210Po were 0.062 Bq. m^-2.d^-1 and 0.566 Bq.m^-2.d^-1 for station NS44 and IV3 along with the recycle efficiency of 52±26% and 119±52%, respectively. Remineralized fluxes of POM derived from ^210Po and exported POC were 0.6 mmol C.m^-2.d^-1 and 2.7 mmol C. m^-2. d^-1 for NS44 and IV3. This study suggested that ^210Po was a powerful tracer of particle export and remineralization.