Reactive Radionuclides as Indicators of New Production and Particle Transformations in the Equatorial Pacific Water Column: JGOFS

侦探作为全球海洋通量联合研究（JGOFS）在赤道太平洋的一部分，建议研究一套自然产生的放射性核素的分布和颗粒通量的时空变化。要测量的放射性核素作为海洋示踪剂，可提供有关生物地球化学过程速率的基本信息，这些过程控制着海洋水柱中生物成因粒子的产生和命运。这项研究旨在验证一个假设，即颗粒物质对可溶性化学物质的吸收和释放，海洋水柱中颗粒聚集体的形成和破坏的速度随海面浮游生物产量和离开表层的有机物通量的变化而在空间和时间上发生变化。这些数据将在生物速率测量和将在联合地表观测系统内收集的其他数据的范围内加以解释，并将用于测试生物地球化学模型。

The P.I.'s propose to study spatial and temporal variations in the distributions and particulate fluxes of a suite of naturally occurring radioactive nuclides as part of the Joint Global Ocean Flux Study (JGOFS) in the equatorial Pacific. The radionuclides to be measured serve as ocean tracers that yield fundamental information about the rates of biogeochemical processes that govern the production and fate of biogenic particles in the oceanic water column. The study is designed to test the hypothesis that the uptake and release of soluble chemical species by particulate matter, and the formation and destruction of particle aggregates in the oceanic water column occur at rates that vary both spatially and temporally in response to variations in the rate of plankton production at the sea surface and the flux of organic matter leaving the surface layer. The data will be interpreted within the context of biological rate measurements and other data to be collected within JGOFS and will be used to test biogeochemical models.