Collaborative Research: Pacific-Arctic Carbon Synthesis - Transformations, Fluxes, and Budgets.

合作研究：太平洋-北极碳合成 - 转换、通量和预算。

• 批准号: 1228651
• 负责人: Laurie Juranek
• 金额: $ 3.98万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-11-15 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1228651&HistoricalAwards=false
• 关键词: Collaborative; Research; Pacific; Arctic; Carbon

Predicting future conditions of the Arctic Ocean system requires scientific knowledge of its present status as well as a process-based understanding of the mechanisms of change. This research effort will synthesize a number of recent, upcoming, and historical datasets to create three regional carbon budgets for the Chukchi/western Beaufort Sea, the Bering Sea, and the northern Gulf of Alaska. As waters from the North Pacific make their way through these regions a number of transformations occur that modify them before they enter the central Arctic Ocean. In general, the waters exiting these shelf seas are fresher, colder, and have lower pH due to the uptake of CO2 and the remineralization of organic matter. Because of the importance that biogeochemical transformations have in preconditioning the waters of the central Arctic and ultimately parts of the North Atlantic it is important to gain a better understanding of how these processes impact the carbon biogeochemistry of the region. The investigators propose to address this issue by better constraining the carbon budgets for three zones in the Pacific sector of the Arctic Ocean including coastal fluxes, rates of primary production and air-sea exchange of CO2 as well as developing algorithms with predictive capabilities for carbonate mineral saturation states. The aim of this effort is to determine how physical forcing and biological responses control the marine carbon cycle including the rates of air-sea CO2 exchange and net community production as well as ocean acidification effects in the contrasting shelf environments, and to better constrain the present stocks and fluxes of carbon and determine how climate change will affect the regional carbon cycle. The project will support four early career investigators, a postdoctoral scientist, and a Ph.D. student.

预测北冰洋系统的未来状况需要对其现状的科学了解以及对变化机制的基于过程的理解。这项研究工作将综合一些最近的、即将到来的和历史的数据集，为楚科奇/波弗特海西部、白令海和阿拉斯加北部湾创建三个区域碳预算。当来自北太平洋的水域流经这些地区时，会发生许多变化，这些变化在进入北冰洋中部之前会改变这些地区。一般来说，由于二氧化碳的吸收和有机物的再矿化，离开这些陆架海的海水更新鲜、更冷，并且 pH 值更低。由于生物地球化学转变对于预处理北极中部以及最终北大西洋部分水域的重要性，因此更好地了解这些过程如何影响该地区的碳生物地球化学非常重要。研究人员建议通过更好地限制北冰洋太平洋区三个区域的碳预算来解决这个问题，包括沿海通量、初级生产力和二氧化碳的海气交换，以及开发具有碳酸盐矿物预测能力的算法饱和状态。这项工作的目的是确定物理强迫和生物反应如何控制海洋碳循环，包括海气二氧化碳交换率和净群落生产以及对比陆架环境中的海洋酸化效应，并更好地限制目前的海洋碳循环。碳储量和通量并确定气候变化将如何影响区域碳循环。该项目将支持四名早期职业研究人员、一名博士后科学家和一名博士。学生。