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

9818266hall本项目是对世界海洋环流实验（WOCE） AIMS （Analysis, Interpretation, Modeling, and Synthesis）阶段的贡献。在WOCE的早期，在热带南大西洋开始了深盆地实验（DBE）。美国和法国科学家发起了各种各样的观察，包括水文调查、系泊阵列、水下浮子等。作为合成DBE数据的一部分，PI建议继续分析赤道沿西经36度以及罗曼切和链断裂区（RFZ和CFZ）的系缆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南极底水（AABW）的两个出口通道。对平均AABW输运量及其变率的估计已经发表。该方案解决了在36°W的势温等级下的输运，这将估计通过阵列的温度/热通量。以等温线为界的体积上的平流扩散热收支将用于获得赤道北部和南部盆地AABW的平均垂直扩散率的估计，并将研究在底部水中观察到的缓慢变化的含义，包括计算随时间变化的扩散系数的可能性。

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.