Microfossil Analysis of Sediment Trap and Sediments from the JGOFS Equatorial Pacific Transect

赤道太平洋全球海洋通量研究的一个重要目标是表征从表层海洋到深海的物质通量。海洋沉积物及其包含的化石贝壳在最终实现这一目标方面可以发挥至关重要的作用。在这项建议中，S希望对收集到的微化石进行四个阶段的研究：1)在层状浮游生物拖网中收集的；2)在沉积物陷阱中收集的；3)在赤道太平洋近表层沉积物中保存的；4)跨越最后一个完整的冰川-间冰期周期的沉积物。S建议对两个主要浮游动物化石群放射虫和有孔虫进行定量普查，并对赤道站浮游生物拖网、沉积物圈闭和近地表沉积物样品中发现的有孔虫进行了详细的稳定同位素分析。这项实验将提高我们对海洋沉积物形成过程的理解。有了这样的理解，我们将能够更好地从保存下来的沉积物记录中重建这些过程，以评估过去生物来源通量的变化。

One important goal of the Global Ocean Flux Study in the equatorial Pacific is to characterize material fluxes from the surface ocean to the deep sea. Marine sediments, and the fossil shells they contain, can play a vital role in the ultimate achievement of this goal. In this proposal the P.I.'s wish to conduct a four-phase study of microfossils collected 1) in stratified plankton tows, 2) in sediment traps, 3) preserved in near-surface sediments of the equatorial Pacific and 4) sediments which span the last full glacial-interglacial cycle. The P.I.'s propose a quantitative census of radiolaria and foraminifera, the two dominant zooplankton fossil groups, and detailed stable isotopic analysis of foraminifera found in plankton tow, sediment trap, and near surface sediment samples of the Equatorial Stations. This experiment will improve our understanding of the processes that contribute to the formation of marine sediments. With this understanding, we will be better able to reconstruct these processes from the preserved sediment record, to assess past variations in biogenic fluxes.