Analysis of full-depth profiles of mixing observations across the Arctic Ocean

Winsor 0612342为一个为期一年的项目提供了资金，该项目包括对一套独特的实地观测进行仔细分析，以确定北冰洋沃茨湍流扩散、热通量和混合率的特征。 拟议的工作有可能大大增加对北冰洋混合及其对热、盐和动量通量的影响的了解，并将深入了解整个北冰洋混合的流域尺度分布。 这些数据还使调查厘米级结构的侵入，双扩散过程，地热加热的深层沃茨。 PI将生成完整的记录良好的数据集，包括原始数据和分析数据以及混合估计值。 数据包括微尺度温度和电导率波动，以及速度剪切，在深加拿大，马卡罗夫和阿蒙森盆地，并在阿尔法-门捷列夫和罗蒙诺索夫岭的配置文件。 它们是在2005年瑞典破冰船奥登号的跨北极巡航中收集的。 这些新的和独特的测量是由一次性探头，降低声学多普勒海流剖面仪，和一个完整的水文地球化学计划的信息补充。 初步分析表明，所收集的数据质量非常高，噪音水平低，包含高分辨率的强化混合的清晰特征。 这些分析提供了对北冰洋源自大西洋的暖水层的垂直热通量的更好了解，这应有助于同样更好地了解大西洋和北冰洋之间的海洋耦合对海冰损失和气候变率的作用。 这些分析也可能有助于指导规划今后在北冰洋的观测活动。

Winsor0612342Funds are provided for a one-year project consisting of careful analysis of a unique set of field observations leading to characterization of turbulent diffusion, heat fluxes and mixing rates in the waters of the Arctic Ocean. The proposed work has the potential to increase significantly understanding of mixing in the Arctic Ocean and its influence on fluxes of heat, salt and momentum, and will provide insight into the basin-scale distribution of mixing across the Arctic Ocean. The data also enable investigation of the centimeter-scale structure of intrusions, double-diffusive processes, and geothermal heating of the deep waters. The PIs will produce a complete well-documented data set, consisting of raw and analyzed data and mixing estimates. The data consist of profiles of microscale temperature and conductivity fluctuations, as well as velocity shear, across the deep Canada, Makarov, and Amundsen Basins, and also over the Alpha-Mendeleyev and Lomonosov Ridges. They were collected in 2005 during the trans-Arctic cruise of the Swedish icebreaker Oden. These new and unique measurements are complemented by information from expendable probes, lowered acoustic Doppler current profiler, and a full hydrographic-biogeochemical program. Preliminary analysis shows that the collected data is of very high quality, with low noise levels and contains clear signatures of intensified mixing at a high resolution. The improved understanding of vertical heat flux from the warm layer of water of Atlantic origin in the Arctic Ocean that is provided by these analyses should enable similarly enhanced understanding of the role of oceanic coupling between the Atlantic and the Arctic Oceans on sea ice loss and climate variability. The analyses may also prove useful in guiding the planning of future observational campaigns in the Arctic Ocean.