Sensitivity of Arctic Ocean Change to Background Mixing

莫里森0909408华盛顿大学直接测量海洋混合是困难的，但几十年的研究表明，深层背景混合是内波能量耗散的结果。这种关系的确切性质是一个悬而未决的问题，但它使得从相对简单的内波能量观测中推断混合成为可能。预计北极夏季无冰沃茨的增加将导致海洋内波能的增加，并可能对海洋过程和气候产生意想不到的后果。 PI将使用新方法分析现有海洋数据的内波和混合，这些方法在许多情况下尚未应用于北极环境。这些技术将通过一位合作的挪威科学家在实验中对混合进行的直接测量进行测试。他将利用现有的数据来研究混合和内波的关系以及内波能量与冰盖的关系。他还将对内波的能量学进行简单的研究，将现有的关于内波强迫的想法与新的冰模型结果相结合。对大规模冰洋模型的敏感性研究将探讨北冰洋模型在特定时空变化背景混合下的行为以及冰混合对气候的正反馈潜力。

Morison 0909408University of WashingtonDirect measurements of oceanic mixing are difficult, but decades of research suggest that deep background mixing is a consequence of dissipation of internal wave energy. The exact nature of this relationship is an open question, but it makes it possible to infer mixing from relatively simple observations of internal wave energy. The anticipated increase of summer ice-free waters in the Arctic should result in an increase in internal wave energy in the ocean and potentially unanticipated consequences for ocean processes and climate. The PI will analyze existing ocean data for internal waves and mixing using new methods, which in many cases have not been applied to the Arctic environment. The techniques will be tested against direct measurements of mixing done in an experiment by a collaborating Norwegian scientist. He will use existing data to examine the relation of mixing and internal waves and the relation of internal wave energy to the ice cover. He will also perform a simple study of the energetics of internal waves that combines existing ideas about the forcing of internal waves with new ice model results. Sensitivity studies with a large-scale ice ocean model will explore the Arctic Ocean model behavior under specified temporally and spatially varying background mixing and the potential for a positive ice-mixing feedback on climate.