Global Synthesis of Deep Ocean Carbon, Carbonate, Opal and Nutrient Particle Fluxes, Benthic Fluxes and Sediment Accumulation

要发展对全球生物源通量的准确理解，将需要综合卫星研究、过程研究、时间序列研究和海底研究，每个研究都提供独特的信息。卫星观测提供了表面色素分布的全球天气图，但本身并不限制从光区到深海的通量。过程和时间序列研究提供了关于生物材料的生产、转化和通量的详细信息，但在非常有限的特定地点。海底研究虽然不限制短期的时间变异性，但对深海通量的全球分布进行了评估。为此，PI建议根据一个一般的成岩模型，在吸收全球海底对有机碳、碳酸钙、蛋白石和底栖氧的测量的成岩模型的基础上，对整个盆地范围内的碳通量进行定量描述。此外，PI还将把营养剂和选定的金属熔剂(Ba和Ge)汇编成相同的数据集，以便可以将这些组分的熔剂模式与碳通量进行比较。预计这项研究的结果将产生一个有机碳-碳酸钙-蛋白石模型，用该模型可以说明碳酸钙和蛋白石积累对有机碳积累的影响，并允许在改进海底生物来源通量的描述时考虑其他环境因素。

ABSTRACTOCE-9911707The development of an accurate understanding of global biogenic fluxes will require the synthesis of satellite, process, time-series and seafloor studies, each providing unique information. Satellite observations provide global, synoptic images of surface pigment distributions, but by themselves do not constrain fluxes from the photic zone to the deep ocean. Process and time-series studies provide detailed information about the production, transformation and fluxes of biogenic materials, but at a very limited number of specific locations. Seafloor studies, while not constraining short-term temporal variability, provide an assessment of the global distribution of the deep oceanic fluxes. For this reason, the PI proposes to develop a basin-wide, quantitative description of carbon fluxes based on a general diagenetic model into which global seafloor measurements of organic carbon, calcium carbonate, opal and benthic oxygen are assimilated. In addition, the PI also will compile nutrient and selected metal fluxes (Ba and Ge) into the same data set so that flux patterns of these components can be compared to carbon fluxes. It is expected that results from this study will yield an organic carbon-calcium carbonate-opal model by which the impact of calcium carbonate and opal accumulations on the organic carbon accumulation can be represented, as well as the permit other environmental factors to be considered in developing an improved description of seafloor biogenic fluxes.