Physical Impacts on late Season Productivity in Changing Arctic

北极地区正在经历环境变化，这些变化对当地北极生态系统和依赖其生存的社区产生了重要影响。例如，一个更长的冰盖减少季节意味着更多的海洋植物生长的可能性。然而，植物生长的速度可能会受到较长生长季节中可用养分耗尽的限制。了解是有限的，因为对物理过程如何帮助在季节后期补充真光层的营养素的知识不完整。重要的过程跨越一系列尺度，从小尺度湍流混合到区域尺度的风驱动的上升流。该项目将结合新的物理和生物测量，以了解物理变化的生物反应。这项工作利用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来促进STEM劳动力的增强。公众宣传将通过俄勒冈州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巡航中，测量精细尺度切变、速度和湍流的仪器将被集成到一个能够在广阔区域进行高分辨率采样的拖曳式飞行器上。该拖曳式潜水器由一个现有项目供资，可在整个水体中进行连续的现场水取样，并配备了一套全面的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重要的见解。

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.