Shipborne ADCP data in the Thwaites Gyre region, 2019

This dataset contains the velocity profiles in the Thwaites Gyre region collected by the shipborne Acoustic Doppler Current Profiler (ADCP) onboard RV Nathaniel B Palmer in 2019 under the project Thwaites-Amundsen Regional Survey and Network Integrating Atmosphere-Ice-Ocean Processes (TARSAN). Ocean current velocities over the upper 980 m of the water column were obtained using a 75 kHz Ocean Surveyor (OS75) and a 38 kHz Ocean Surveyor (OS38) shipboard Acoustic Doppler Current Profiler (sADCP). Common Ocean Data Access System (CODAS) processing has been run to generate the NetCDF files. The authors made additional quality control including, 1. removing data with velocity values higher than 0.6 m/s and other obvious outliners, and 2. removing data below 400 m for OS75 and data below 760 m for OS38 as the last several levels in the velocity profiles are believed to be potentially affected by the water turbidity and bubbles passing below the sADCP etc. The data are stored in .txt format and .mat MATLAB format.

本数据集收录了2019年依托"斯韦特斯-阿蒙森区域勘测与大气-海冰-海洋过程集成网络（Thwaites-Amundsen Regional Survey and Network Integrating Atmosphere-Ice-Ocean Processes, TARSAN）"项目，由搭载于R/V内森尼尔·B·帕尔默号（RV Nathaniel B Palmer）研究船的船载声学多普勒流速剖面仪（Acoustic Doppler Current Profiler, ADCP）在斯韦特斯环流（Thwaites Gyre）区域采集得到的海流流速剖面数据。研究团队采用75 kHz海洋勘探者（Ocean Surveyor, OS75）与38 kHz海洋勘探者（Ocean Surveyor, OS38）两款船载声学多普勒流速剖面仪（shipborne Acoustic Doppler Current Profiler, sADCP），获取了水深980米以浅的水体海流流速数据。研究人员通过通用海洋数据访问系统（Common Ocean Data Access System, CODAS）完成标准处理流程，生成了NetCDF格式数据文件。作者团队额外开展了针对性质量控制工作，具体包括：1. 剔除流速值高于0.6 m/s的数据及其他明显异常值；2. 针对OS75采集的数据，剔除400米以深的观测结果；针对OS38采集的数据，剔除760米以深的观测结果——这是由于流速剖面末端的数个层级可能受到船载ADCP下方水体浊度与途经气泡的干扰。本数据集以.txt文本格式与.mat MATLAB格式存储。