Global Export and Recycling of Biogenic Material into the Ocean Interior: A Synthesis

在这个项目中，伍兹霍尔海洋研究所的研究人员将汇编来自美国全球海洋通量联合研究(U.S.JGOFS)和其他来源的已发表和未发表的沉积物捕集通量数据，以完善目前对区域和全球通量的估计，以及输入到海洋内部的生源(有机碳、文石、蛋白石、氮和磷)和致岩颗粒物质的再矿化。他们将绘制海洋内部生物和岩石通量的天气图，记录颗粒成分和通量的系统区域变化，评估水柱上部1公里处有机再矿化和营养物质再生的程度，并估计1公里深度以下的再循环。此外，他们对存档的捕集器颗粒样本中的Th-230和PA-231含量进行了新的测量，以纠正不同设计的沉积物捕集器收集效率的差异。它们还将记录各种浮游物种在碳酸盐颗粒和二氧化硅颗粒通量中的相对重要性，估计海底表层沉积物中物质的再循环程度，比较和评估水柱中致岩颗粒的通量和输入海洋的大气粉尘之间的联系。

ABSTRACTOCE-9986766In this project, investigators at the Woods Hole Oceanographic Institution will compile published and unpublished sediment trap flux data from the U.S. Joint Global Ocean Flux Study (U.S.JGOFS) and other sources to refine current estimates of regional and global fluxes and remineralization of biogenic (organic carbon, aragonite, opal, nitrogen, and phosphorous) and lithogenic particulate material input to the ocean interior. They will construct synoptic maps of biogenic and lithogenic fluxes to the ocean interior, document systematic regional variations of particle composition and flux, evaluate the degree of organic remineralization and nutrient regeneration in the upper 1 km of the water column, and estimate recycling below 1 kilometer depth. Additionally they make new measurements on the Th-230 and Pa-231 content in archived trap particulate samples to correct for variations in the collection efficiencies of sediment traps of different design. They will also document the relative importance of various planktonic species in the flux of particulate carbonate and silica, estimate the extent of recycling of material in surface sediments on the seafloor, and compare fluxes of and assess links between lithogenic particles in the water column and atmospheric dust input to the ocean.