Near-Surface Current Shear from Multiple Instruments, Submesoscale Processes and Lagrangian Analysis on the SHelf (SPLASH), northern Gulf of Mexico, 27 April 2017

As part of CARTHE's SPLASH (Submesoscale Processes and Lagrangian Analysis on the SHelf) experiment, current observations were obtained from a variety of instruments in the Louisiana Bight, northern Gulf of Mexico. On 27 April 2017, between 17:00 UTC and 22:00 UTC, six types of measurements at various depths were taken, which in combination provide the near-surface current shear in the area 89°38.29' W - 89°41.25' W and 29°9.83' N - 29°10.65' N. This dataset contains the current measurements obtained from (1) thin bamboo plates at 0.9 cm depth; (2) an undrogued LASER-style drifter at 1.8 cm depth; (3) a drogued LASER-style drifter at 30 cm depth; (4) polarimetry valid at 0.8 cm - 4.9 cm depth; (5) the ADCP mounted on the autonomous REMUS for depths between 0.18 m and 3.77 m; and (6) the bottom-mounted ADCP from the research vessel Walton Smith for depths between 4 m and 13.5 m. In addition, the velocities obtained from a theoretical Stokes drift profile are provided for the top 1 m in steps of 0.1 cm.作为CARTHE发起的SPLASH（陆架中尺度过程与拉格朗日分析，Submesoscale Processes and Lagrangian Analysis on the SHelf）实验的组成部分，本数据集的海流观测数据采自墨西哥湾北部路易斯安那湾的多类观测仪器。2017年4月27日协调世界时（UTC）17:00至22:00期间，研究团队开展了多深度的六类测量工作，综合这些测量结果可获取区域89°38.29′W - 89°41.25′W、29°9.83′N - 29°10.65′N内的近表层海流切变。本数据集包含以下六类仪器获取的海流测量数据：(1) 布放于0.9 cm深度的薄竹片；(2) 布放于1.8 cm深度的无曳航激光式漂流浮标；(3) 布放于30 cm深度的带曳航激光式漂流浮标；(4) 有效测量深度范围为0.8 cm~4.9 cm的偏振测流设备；(5) 安装在自主式REMUS水下航行器上的声学多普勒流速剖面仪（Acoustic Doppler Current Profiler, ADCP），其测量深度区间为0.18 m至3.77 m；(6) 搭载于科研船舶Walton Smith的坐底式声学多普勒流速剖面仪，测量深度范围为4 m至13.5 m。此外，数据集还提供了该区域表层1 m范围内以0.1 cm为步长的理论斯托克斯漂流（Stokes drift）剖面流速数据。