Time-series measurements of oceanographic and seabed response data collected in Cape Cod Bay, Barnstable, MA, March 10 to April 7, 2021

To assess cross-shore sediment transport prediction techniques in coastal models for a wave-dominated sandy coast, the U.S. Geological Survey Woods Hole Coastal and Marine Science Center collected data to measure wave-induced and mean current water velocities near the seabed and the response of the seabed to these forces. A four-legged bottom landing frame (quadpod) containing oceanographic instruments was deployed on the seafloor in the nearshore zone of Cape Cod Bay off Sandy Neck Beach, Barnstable, MA on March 10, 2021 and recovered April 7, 2021, to coincide with a climatologically active period for storms. The quadpod was mounted with upward- and downward-looking 5-beam acoustic doppler current profilers (Nortek Signatures) to measure velocity throughout the water column and calculate wave statistics, two acoustic doppler velocimeters (Nortek Vectors) to measure water velocity near the seabed, a conductivity and temperature recorder (SeaBird Microcat) to measure temperature and salinity, a wave and tide pressure logger (SeaBird Seagauge), a digital rotary sonar (Imagenex) to image the seabed, and an acoustic backscatter sensor (Aquatec Aquascat) to profile acoustic backscatter near the seabed. Time-series data was processed using USGS software (stglib), producing network Common Data Format (netCDF) files, compliant to Climate and Forecast (CF) data convention. Additionally, sediment samples were collected for grain-size analysis. These data will be used in a coupled ocean-atmosphere-wave-sediment transport model at different grid scales to encompass storm events, regional waves and currents, and fine-resolution wave-breaking to increase our understanding of the drivers that control sediment movement in Cape Cod Bay and help coastal zone managers to better address shoreline change issues.

为评估波浪主导型沙质海岸沿岸模型中的跨岸泥沙输运预测技术，美国地质调查局伍兹霍尔海岸与海洋科学中心（U.S. Geological Survey Woods Hole Coastal and Marine Science Center）收集了相关观测数据，用于测量近海底处的波浪诱导水流与平均水流流速，以及海底对上述水动力作用力的响应。
2021年3月10日，搭载全套海洋学观测仪器的四腿海底着陆架（quadpod）被部署于马萨诸塞州巴恩斯特布尔县桑迪内克海滩外侧科德角湾的近岸带海底，此次部署恰逢气候学意义上的风暴活跃期，并于2021年4月7日完成回收作业。
该四腿架搭载了多类专业观测设备：包括可实现全水柱流速测量与波浪统计量计算的向上、向下观测型5波束声学多普勒流速剖面仪（5-beam acoustic doppler current profilers，型号为Nortek Signatures）2台；用于近海底水流流速高精度测量的声学多普勒测速仪（acoustic doppler velocimeters，型号为Nortek Vectors）2台；用于同步测量海水温度与盐度的电导率温度记录仪（SeaBird Microcat）1台；用于监测波浪与潮汐压力的压力记录仪（SeaBird Seagauge）1台；用于海底地形成像的数字旋转声纳（Imagenex）1台；以及用于近海底声学背散射剖面测量的声学背散射传感器（Aquatec Aquascat）1台。
时序观测数据通过美国地质调查局自研的stglib软件完成标准化处理，生成符合气候与预报（CF）数据规范的网络通用数据格式（netCDF）文件。此外，研究团队还同步采集了海底泥沙样本，用于粒度分析测试。
本数据集将被应用于不同网格尺度的耦合海洋-大气-波浪-泥沙输运模型中，以覆盖风暴事件、区域波浪与水流过程以及高分辨率波浪破碎过程，从而加深学界对科德角湾泥沙运动控制因子的理解，并助力海岸带管理者更高效地应对岸线变化相关的管理与防护问题。