Collaborative Research: Understanding Environmental and Ecological Controls on Carbon Export and Flux Attenuation near Bermuda

合作研究：了解百慕大附近碳输出和通量衰减的环境和生态控制

• 批准号: 2318940
• 负责人: Hyewon Kim
• 金额: $ 53.36万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-04-01 至 2027-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2318940&HistoricalAwards=false
• 关键词: Collaborative; Research; Understanding; Environmental; Ecological

The research supported by this award will quantify transport of Carbon into, and Carbon’s fate within, the mesopelagic zone (200 – 1000m depth) at the Bermuda Atlantic Time Series Site (BATS). Chemical, biological, and physical measurements at BATS will be combined with a mechanistic model designed to identify key controls on the export of organic carbon into these intermediate depths. The over-arching goal of the model-data synthesis is to identify and understand controls on the C-flux pathways . In this project, a data-guided model will be used to compare the relative importance of particle sinking, mixing of dissolved organic carbon, and active transport by organisms. Broader impacts include a video game, visits to/from a charter school which serves students from communities underrepresented in Geosciences, supervision of undergraduates via the Woods Hole Partnership Education Program, advising of one graduate student, and of one postdoc. Both PIs are female early-career scientists, one from a group underrepresented in Oceanography.A mechanistic biogeochemical model capable of assimilating key metabolic and physiological rates and stocks of zooplankton and heterotrophic bacteria in the mesopelagic zone (200-1000 m) will be constructed, evaluated, and utilized with the goal of quantifying and comparing fluxes of particle sinking, mixing of dissolved organic carbon (DOC), and active export, by diel vertical migration of zooplankton, of respiratory CO2, particles and DOC. In addition, the fate of organic carbon in the mesopelagic will be characterized by comparing bacterial versus zooplankton respiration. Characterization of the relative magnitudes of these fluxes will provide a view of environmental and ecological controls on export pathways and on the ultimate fate of organic carbon exported from the euphotic to the mesopelagic zone at this location.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项支持的研究将量化百慕大大西洋时间序列站点 (BATS) 中层区域（200 – 1000 m 深度）的碳传输以及碳在其中的命运，BATS 的化学、生物和物理测量将结合起来。模型数据合成的首要目标是识别和理解碳通量路径的控制。在该项目中，将使用数据引导模型来比较颗粒下沉、溶解有机碳的混合和生物体主动运输的相对重要性，更广泛的影响包括视频游戏、参观/离开为学生服务的特许学校。来自地球科学领域代表性不足的社区，通过伍兹霍尔合作教育计划对本科生进行监督，为一名研究生和一名博士后提供建议，两名 PI 都是女性早期职业科学家，其中一名来自海洋学领域代表性不足的群体。将构建、评估和利用能够同化中层带（200-1000 m）中浮游动物和异养细菌的关键代谢和生理速率以及库存的机械生物地球化学模型，以量化和比较颗粒下沉、混合的通量。溶解有机碳（DOC），以及通过浮游动物的昼夜垂直迁移，呼吸性二氧化碳、颗粒物和DOC的主动输出。通过比较细菌与浮游动物的呼吸作用，可以对这些通量的相对大小进行表征，从而了解对输出途径的环境和生态控制以及从该位置的透光层输出到中层区域的有机碳的最终命运。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。