Analysis of Velocity and Temperature Time Series in the Equatorial Atlantic in the Context of the Deep Basin Experiment

深盆实验背景下赤道大西洋速度和温度时间序列分析

• 批准号: 9818266
• 负责人: Melinda Hall
• 金额: $ 25.4万
• 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: 1999
• 资助国家: 美国
• 起止时间: 1999-03-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9818266&HistoricalAwards=false
• 关键词: Analysis; Velocity; Temperature; Time; Series

9818266HallThis project is a contribution the the AIMS (Analysis, Interpretation, Modeling, and Synthesis) phase of the World Ocean Circulation Experiment (WOCE). In the early part of WOCE, the Deep Basin Experiment (DBE) was begun in the tropical South Atlantic. A variety of observations were initiated by both US and French scientists, which included hydrographic surveys, mooring arrays, subsurface floats, and others. As part of the effort to synthesize DBE data, the PI proposes to continue analysis of velocity and temperature measurements from moored arrays at the equator along 36 degrees West and in the Romanche and Chain Fracture Zones (RFZ and CFZ). These arrays monitored the two exit passages for AntArcticBottom Water (AABW) from the Brazil Basin. Estimates of mean AABW transport and its variability have already been published. This proposal addresses the transport in potential temperature classes at 36 degrees W, which will estimate the temperature / heat flux through the array. Advective-diffusive heat budgets over volumes bounded by isotherms will be used to obtain estimates of average vertical diffusivity in the AABW in the basins north and south of the equator, and the implications of slow changes observed in the bottom water will be studied, including the possibility of calculating time-dependent diffusive coefficients.

这个项目是对世界海洋环流实验(WOCE)的AIMS(分析、解释、建模和综合)阶段的贡献。在WOCE早期，热带南大西洋开始了深盆实验(DBE)。美国和法国科学家发起了各种观测，其中包括水文测量、系泊阵列、地下漂浮物等。作为合成DBE数据的努力的一部分，PI提议继续分析赤道西经36度以及罗曼奇断裂带和链状断裂带(RFZ和CFZ)的系泊阵列的速度和温度测量结果。这些阵列监测了来自巴西盆地的反北极海底水(AABW)的两个出口通道。对平均AABW输送及其变异性的估计已经公布。该方案涉及在36度W的潜在温度类别中的传输，这将估计通过阵列的温度/热通量。将使用等温线限定的体积上的对流-扩散热收支来估计赤道北部和南部盆地AABW的平均垂直扩散系数，并将研究观察到的底层水缓慢变化的影响，包括计算与时间有关的扩散系数的可能性。