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

北冰洋混合观测的全深度剖面分析

• 批准号: 0612342
• 负责人: Peter Winsor
• 金额: $ 13.65万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-07-01 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0612342&HistoricalAwards=false
• 关键词: Analysis; full; depth; profiles; mixing

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.

Winsor0612342基金是为一个为期一年的项目提供的，该项目包括对一组独特的实地观测进行仔细分析，从而确定北冰洋水域的湍流扩散、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量、盐通量和动量通量的影响的了解，并将提供对整个北冰洋混合在盆地范围内的分布的洞察。这些数据还可以调查侵入的厘米级结构、双扩散过程和深水的地热加热。PIs将产生一个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。这些数据包括加拿大、马卡洛夫和阿蒙森盆地以及阿尔法-门捷列夫和洛蒙诺索夫海脊上的微尺度温度和电导率波动以及速度剪切的剖面。它们是在2005年瑞典破冰船奥登号穿越北极巡航期间收集的。这些新的和独特的测量得到了来自消耗性探头、更低的声学多普勒海流剖面仪和完整的水文生物地球化学计划的信息的补充。初步分析表明，采集的数据质量非常高，噪声水平低，并包含高分辨率强化混合的明显特征。这些分析提供的对北冰洋源自大西洋的暖水层的垂直热通量的进一步了解，应同样有助于更好地了解大西洋和北冰洋之间的海洋耦合对海冰消失和气候变化的作用。这些分析还可能被证明有助于指导未来北冰洋观测活动的规划。