CAREER: The Transformation, Cross-shore Export, and along-shore Transport of Freshwater on Antarctic Shelves

职业：南极大陆架淡水的转型、跨岸出口和沿岸运输

• 批准号: 1945127
• 负责人: Carlos Moffat
• 金额: $ 78.75万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-06-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1945127&HistoricalAwards=false
• 关键词: CAREER; Transformation; Cross; shore; Export

Freshwater discharges from melting high-latitude continental ice glacial reserves strongly control salt budgets, circulation and associated ocean water mass formation arising from polar ice shelves. These are different in nature than freshwater inputs associated with riverine coastal inputs. The PI proposes an observational deployment to measure a specific, previously-identified example of a coastal freshwater-driven current, the Antarctic Peninsula Coastal Current (APCC). The research component of this CAREER project aims to improve understanding of the dynamics of freshwater discharge around the Antarctic continent. Associated research questions pertain to the i) controls on the cross- and along-shelf spreading of fresh, buoyant coastal currents, ii) the role of distributed coastal freshwater sources (as opposed to 'point' source river outflow sources typical of lower latitudes), and iii) the contribution of these coastal currents to water mass transformation and heat transfer on the continental shelf. An educational CAREER program component leverages a series of field experiences and research outputs including data, model outputs, and theory, to bring polar science to the classroom and the general public, as well as training a new polar scientist. This combined strategy will allow the investigator to lay the foundation for a successful academic career as a researcher and teacher at the University of Delaware. The project will also provide the opportunity to train a PhD student. Informal outreach efforts will include giving public lectures at University of Deleware's sponsored events, including Coast Day, a summer event that attracts 8000-10000 people, and remote lectures from the field using an existing outreach network. This proposal requires fieldwork in the Antarctic.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.

高纬度大陆冰川融化储备的淡水排放强烈地控制着极地冰架产生的盐收支、环流和相关的海洋水团形成。这些在性质上不同于与河流沿岸输入有关的淡水输入。PI提出了一个观测部署，以测量一个具体的，以前确定的沿海淡水驱动的电流，南极半岛沿海电流（APCC）的例子。 该项目的研究部分旨在提高对南极大陆周围淡水排放动态的理解。相关的研究问题涉及i）控制跨大陆架和沿大陆架传播的新鲜，浮力沿海流，ii）分布的沿海淡水源的作用（而不是典型的低纬度地区的“点”源河流流出源），和iii）这些沿海流的贡献，对大陆架上的水团转化和传热。 教育职业计划的组成部分利用了一系列的实地经验和研究成果，包括数据，模型输出和理论，将极地科学带到课堂和公众中，并培养新的极地科学家。这种综合策略将使研究者奠定了一个成功的学术生涯作为研究人员和教师在特拉华州大学的基础。该项目还将提供培训博士生的机会。非正式的外展工作将包括在Deleware大学赞助的活动中进行公开讲座，包括海岸日，一个吸引8000-10000人的夏季活动，以及使用现有的外展网络进行远程讲座。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。