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

深海碳、碳酸盐、蛋白石和养分颗粒通量、底栖通量和沉积物积累的全球合成

• 批准号: 9911707
• 负责人: Richard Jahnke
• 金额: --
• 依托单位: Skidaway Institute of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-03-01 至 2005-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9911707&HistoricalAwards=false
• 关键词: Global; Synthesis; Deep; Ocean; Carbon

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.

准确了解全球生物通量的发展需要综合卫星、过程、时间序列和海底研究，每一项研究都提供独特的信息。卫星观测提供了全球的，表面色素分布的天气图像，但本身并不限制从透光层到深海的通量。过程和时间序列研究提供了关于生物源材料的生产、转化和通量的详细信息，但具体地点的数量非常有限。海底研究虽然不限制短期的时间变化，但可以评估深海通量的全球分布情况。为此，PI建议根据一个通用成岩模型，对全盆地范围的碳通量进行定量描述，该模型将全球海底有机碳、碳酸钙、蛋白石和海底氧的测量结果纳入其中。此外，PI还将把营养物和选定的金属通量（Ba和Ge）编入同一数据集，以便将这些组分的通量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，通过该模型可以代表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通量的描述时考虑其他环境因素。