Latitudinal Variations of Particle Fluxes in the Southern Ocean: A Bottom Tethered Sediment Trap Array Experiment

南大洋粒子通量的纬度变化：底部系留沉积物捕集器阵列实验

• 批准号: 9614028
• 负责人: Jack Dymond
• 金额: $ 64.77万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-15 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614028&HistoricalAwards=false
• 关键词: Latitudinal; Variations; Particle; Fluxes; Southern

96-14028 Dymond This research project is part of the US Joint Global Ocean Flux Study (JGOFS) Southern Ocean Program aimed at (1) a better understanding of the fluxes of carbon, both organic and inorganic, in the Southern Ocean, (2) identifying the physical, ecological and biogeochemical factors and processes which regulate the magnitude and variability of these fluxes, and (3) placing these fluxes into the context of the contemporary global carbon cycle. This work is one of forty-four projects that are collaborating in the Southern Ocean Experiment, a three-year effort south of the Antarctic Polar Frontal Zone to track the flow of carbon through its organic and inorganic pathways from the air-ocean interface through the entire water column into the bottom sediment. The experiment will make use of the RVIB Nathaniel B. Palmer and the R/V Thompson. This component, a collaborative study by scientists from the Woods Hole Oceanographic Institution, Oregon State University, and the New Zealand Oceanographic Institution, concerns the export of particulate forms of carbon downward from the upper ocean. The observations will be obtained from an array of time- series sediment traps, and will be analyzed to quantify export fluxes from the Subtropical Front to the Ross Sea, over an 18- months period beginning the early austral summer of 1996. The measurement program will two annual phytoplankton blooms. The southern ocean provides a unique opportunity to investigate the processes controlling export flux in contrasting biogeochemical ocean zones demarcated by oceanic fronts. The temperature changes at the fronts coincide with gradients in nutrient concentrations and plankton ecology, resulting in a large latitudinal change in the ratio of calcium to silica taken up by the phytoplankton communities. This experiment will provide data on how the biological pump operates in the Southern Ocean and how it could potentially impact the level of atmospheric c arbon dioxide. The observed export fluxes of organic carbon, nitrogen, inorganic carbon, biogenic silica and alumina are central to the goals of the JGOFS program.

96-14028 Dymond 该研究项目是美国联合全球海洋通量研究（JGOFS）南大洋计划的一部分，旨在（1）更好地了解南大洋有机和无机碳通量，（2）确定调节这些通量的大小和变化的物理，生态和生物地球化学因素和过程，（3）将这些通量置于当代全球碳循环的背景下。 这项工作是南大洋实验中合作的44个项目之一，南大洋实验是一项为期三年的南极极地锋区南部的努力，旨在跟踪碳通过其有机和无机途径从空气-海洋界面通过整个水柱进入底部沉积物的流动。 实验将使用RVI B Nathaniel B。帕默和汤普森号 这一部分是伍兹霍尔海洋学研究所、俄勒冈州州立大学和新西兰海洋学研究所的科学家合作研究的，涉及从海洋上层向下输出颗粒形式的碳。 观测结果将从一系列时间序列沉积物捕获器中获得，并将进行分析，以量化从1996年初夏开始的18个月期间从副热带锋到罗斯海的输出通量。 测量计划将每年两次浮游植物水华。 南大洋提供了一个独特的机会，调查控制输出通量的过程，在对比的海洋地球化学海洋区划分的海洋锋。 锋温变化与营养盐浓度和浮游生物生态梯度相吻合，导致浮游植物群落吸收的钙硅比在纬度方向上发生很大变化。 这项实验将提供有关生物泵如何在南大洋运作的数据，以及它如何可能影响大气中二氧化碳的水平。 观测到的有机碳、氮、无机碳、生物硅和氧化铝的输出通量是JGOFS计划目标的核心。