SGER: Natural N and C Isotope Biogeochemistry during a Large-Scale, Open-Ocean Fe Fertilization Experiment in the N.W. Pacific (SEEDS II)

来自马萨诸塞州大学的一名研究人员将参加即将在西亚北冰洋太平洋环流进行的一项名为Seed II的日本铁肥实验。这位研究人员的参与将增加氮和碳同位素生物地球化学领域的专业知识，以了解铁刺激的有机质生产的命运。具体地说，研究人员计划分析化肥地块内外收集的样本，以获取以下参数：(1)溶解无机碳、硝酸盐、铵和溶解有机物；(2)总悬浮颗粒有机物和大小分级悬浮颗粒有机物；(3)中大型浮游动物；(4)通过现场大容量过滤收集的沉降性颗粒有机物；以及(5)硅藻、整体和树桩结合的有机物质，以及大型浮游植物。这项研究的结果将使研究人员能够记录在施肥斑块内所产生的有机碳增加的途径和归宿，从而进一步了解铁肥对海洋生物泵的影响。

ABSTRACTOCE-0353311An investigator from the University of Massachusetts will participate in an upcoming Japanese Fe fertilization experiment called SEEDS II taking place in the Western Subarctic Pacific Gyre. Participation of this investigator in the cruise will add expertise in the area of nitrogen and carbon isotopic biogeochemistry to understand the fate of the Fe-stimulated production of organic matter. Specifically, the investigator plans to analyze samples collected both inside and outside of the fertilized patch for the following parameters: (1) dissolved inorganic carbon, nitrate, ammonium and dissolved organic matter; (2) total and size fractionated suspended particulate organic matter; (3) meso- and macrozooplankton; (4) sinking particulate organic matter collected by in-situ large volume filtration; and (5) diatoms, both whole and frustule bound organic matter, as well as large phytoplankton. Results from this study will allow the investigator to document the pathways and fate of the resulting enhanced organic carbon production within the fertilized patch thereby furthering our understanding of the influence of Fe fertilization on the oceanic biological pump.