Water column POM dynamics in Cascadia Margin: effects/controls on seasonal hypoxia and acidification

在卡斯卡迪亚边缘，夏季强劲的风驱动上升流控制着该地区颗粒物有机物（POM）、氧气（O2）和二氧化碳（CO2）的动态。正是由于风的驱动，二氧化碳含量低、二氧化碳含量高和营养丰富的海水上涌，使得卡斯卡迪亚边缘地区容易受到海洋酸化和缺氧的影响。来自俄勒冈州立大学的一位科学家寻求与正在进行的noaa资助的项目合作，以收集有关POM浓度和成分的高分辨率数据。本研究结果将用于(1)确定2011年上升流季卡斯卡迪亚边缘水柱中POM的时空分布，分辨率与NOAA小组计划测量的溶解气体和营养物质相当；(2)对卡斯卡迪亚边缘不同区域、不同深度水体中POM的生物地球化学组成进行表征，阐明其来源和反应性的变化；(3)将POM浓度/成分与原位光学性质联系起来，以开发算法。此外，由于POM数据将补充NOAA获得的氧和无机碳动态的时空覆盖，因此可以很容易地将这两个数据集整合起来，以批判性地评估POM循环对季节性缺氧和酸化的作用。就更广泛的影响而言，将与海洋科学卓越教育太平洋伙伴关系中心协同开展外联工作。此外，预计这位科学家将继续参加社区大学教师的讲习班，以帮助改进他们的课程，并为高中和社区大学教师提供参加研究巡航的机会。通过俄勒冈州印第安人科学、工程和自然资源项目招收的一名本科生将作为该项目的一部分得到支持和培训。

In Cascadia Margin, strong, wind-driven upwelling during the summer months asserts control on particulate organic matter (POM), oxygen (O2) and carbon dioxide (CO2) dynamics in the region. It is the wind-driven upwelling of O2-poor, CO2- and nutrient-rich waters that make Cascadia Margin vulnerable to ocean acidification and hypoxia. A scientist from Oregon State University seeks to partner with an on-going NOAA-funded project to gather high resolution data on POM concentration and composition. Results from this study will be used to (1) determine the spatial/temporal distribution of POM in the water column of Cascadia Margin during the 2011 upwelling season at comparable resolution to the planned measurements of dissolved gases and nutrients by the NOAA group; (2) characterize the biogeochemical compositions POM from different regions and depths of the water column along Cascadia Margin to elucidate changes in its source and reactivity; and (3) relate POM concentrations/compositions to in-situ optical properties to develop algorithms. In addition, because the POM data will complement the spatial and temporal coverage of oxygen and inorganic carbon dynamics to be obtained by NOAA, both datasets can be readily integrated to critically evaluate the role of POM cycling on seasonal hypoxia and acidification.In terms of broader impacts, outreach efforts in concert with the Centers for Ocean Sciences Education Excellence Pacific Partnership would be carried out. In addition, it is anticipated that the scientist would continue his participation in workshops for community college faculty to help improve their curricula, as well as provide high school and community college teachers the opportunity to participate in research cruises. One undergraduate student recruited via the Oregon State Native Americans in Science, Engineering and Natural Resources program would be supported and trained as part of this project.