Submesoscale eddies, fronts, and filaments are ubiquitous in the upper ocean and play an important role in biogeochemical and mixing processes as well as in the energy budget. To capture the high spatial variability of submesoscale processes, it is desirable to simultaneously resolve the vertical and horizontal gradients of hydrographic properties on scales of 10 m to 10 km. We present a revised towed CTD chain, for rapid quasi-synoptic in situ measurements of submesoscale oceanographic features, that is lighter, more robust and scientifically more useful than previous towed CTD chains. This new instrument provides a horizontal resolution of O(1 m) and can be towed at speeds of up to 5 ms-1 for measurements of the upper 100 m of the water column while providing a reasonable vertical resolution of O(1 m – 10 m). Individual CTD probes are equipped with temperature, conductivity, pressure and either rapid response dissolved oxygen or fluorescence sensors at multiple depths, enabling both hydrographic and biogeochemical studies at high resolution. A flexible probe hardware allows either real-time data collection or internal data logging for offline post-processing. Finally, we outline the necessary post-processing steps and provide data examples. With the presented data examples we show and conclude that the advanced towed CTD chain is a flexible and lightweight take on the towed CTD chain concept. It can easily be adapted to scientific needs and provides high quality very high resolution oceanographic data.

中文翻译：

---

用于物理生物高分辨率原位上层海洋测量的先进拖曳式 CTD 链

亚尺度涡流、锋面和细丝在海洋上层无处不在，在生物地球化学和混合过程以及能量收支中发挥着重要作用。为了捕捉亚尺度过程的高空间变异性，最好同时解析 10 m 到 10 km 尺度上水文特性的垂直和水平梯度。我们提出了一个修改后的拖曳 CTD 链，用于快速准天气就地亚尺度海洋学特征的测量，比以前的拖曳式 CTD 链更轻、更稳健且在科学上更有用。这种新仪器提供了水平分辨率欧(1 m) 并且可以以高达 5 ms 的速度牵引-1用于测量水柱上方 100 米，同时提供合理的垂直分辨率欧（1 米 – 10 米）。单个 CTD 探头配备温度、电导率、压力和多个深度的快速响应溶解氧或荧光传感器，能够以高分辨率进行水文和生物地球化学研究。灵活的探头硬件允许实时数据收集或用于离线后处理的内部数据记录。最后，我们概述了必要的后处理步骤并提供了数据示例。通过提供的数据示例，我们展示并得出结论，先进的拖曳式 CTD 链是对拖曳式 CTD 链概念的灵活且轻量级的体现。它可以很容易地适应科学需求，并提供高质量、高分辨率的海洋学数据。