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Physical Impacts on late Season Productivity in Changing Arctic

不断变化的北极对晚季生产力的物理影响

基本信息

批准号：
1734777
负责人：
Emily Shroyer
金额：
$ 24.55万
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：
2017
资助国家：
美国
起止时间：
2017-09-01 至 2020-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1734777&HistoricalAwards=false
关键词：
Physical Impacts late Season Productivity

项目摘要

The Arctic region is experiencing environmental changes that have important implications for the local Arctic ecosystem and the communities that depend on it for their subsistence. For example, a longer season of reduced ice cover suggests the possibility of more marine plant growth. Yet, the rate at which plants grow may be limited by the exhaustion of available nutrients during the longer growing season. Understanding is limited by an incomplete knowledge of how physical processes help replenish nutrients in the euphotic zone late in the season. Important processes span a range of scales, from small scale turbulent mixing to regional scale wind-driven upwelling. This project will pair novel physical and biological measurements to understand the biological response to changes in the physics. The work takes advantage of a scheduled cruise to reduce costs. The project will contribute to STEM workforce enhancement by supporting the development of an early career scientist. Public outreach will be accomplished through a science communication fellowship at the Oregon Museum of Science and Industry. During a cruise to the Chukchi Sea in late summer, instruments to measure fine-scale shear, velocity, and turbulence will be integrated onto a towed vehicle capable of high-resolution sampling over broad areas. The towed vehicle, which is funded through an existing project, allows for continuous in-situ water sampling throughout the water column and is equipped with a suite of comprehensive biological sensors and standard physical sensors. The proposed additions will yield a unique set of simultaneous, comprehensive high-resolution physical and biological observations. The collective analysis of these observations will provide critical insight into biophysical interactions in the changing Arctic.

北极地区正在经历环境变化，这对当地的北极生态系统和依赖北极生态系统生存的社区具有重要影响。例如，冰盖减少的季节越长，意味着海洋植物生长的可能性越大。然而，植物生长的速度可能会受到在较长的生长季节中可用养分耗尽的限制。了解是有限的物理过程如何帮助补充营养在热区在季节晚些时候的不完整的知识。重要的过程跨越了一系列尺度，从小规模的湍流混合到区域尺度的风驱动上升流。这个项目将结合新的物理和生物测量来了解生物对物理变化的反应。这项工作利用了定期巡航来降低成本。该项目将通过支持早期职业科学家的发展，为STEM劳动力的增强做出贡献。公众外展将通过俄勒冈科学与工业博物馆的科学传播奖学金来完成。在夏末前往楚科奇海的一次航行中，测量细尺度切变、速度和湍流的仪器将被集成到一辆拖曳车上，能够在广阔的区域进行高分辨率采样。该拖曳车由现有项目资助，可以在整个水柱中连续进行原位水采样，并配备了一套综合生物传感器和标准物理传感器。拟议的增加将产生一套独特的同时，全面的高分辨率物理和生物观测。对这些观测结果的集体分析将为不断变化的北极的生物物理相互作用提供关键的见解。