Physical Impacts on late Season Productivity in Changing Arctic

北极地区正在经历环境变化，这对当地北极生态系统及其赖以生存的社区具有重要影响。例如，冰盖减少的较长季节意味着更多海洋植物生长的可能性。然而，植物的生长速度可能会受到较长生长季节中可用养分耗尽的限制。对于物理过程如何在季节后期帮助补充真光带中的营养物质的不完全了解，限制了人们的理解。重要的过程跨越了一系列尺度，从小尺度的湍流混合到区域尺度的风力驱动的上升流。这个项目将把新的物理和生物测量配对，以了解生物对物理变化的反应。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，为STEM劳动力的增强做出贡献。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邮轮期间，测量细尺度剪切、速度和湍流的仪器将被集成到能够在大片区域进行高分辨率采样的拖车上。拖车由一个现有项目提供资金，允许在整个水柱中进行连续的现场水样采样，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步、全面的高分辨率物理和生物观测。对这些观测的集体分析将为了解变化中的北极的生物物理相互作用提供重要的洞察力。

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.