Mud Motor - Tidal channel

These data sets were obtained in the context of the STW project “Sediment for salt marshes: physical and ecological aspects of a Mud Motor” with Project Number 13888, which is partly financed by The Netherlands Organisation for Scientific Research (NWO). The data set consists of 8 netcdf-files named cruiseXdeployment1/2.nc and 4 netcdf-files named filtration_cruiseX.nc. Each of the first 8 netcdf-files contains a 12.5h record of vertical profiles of current velocities, temperature, salinity, optical backscatter and the suspended particulate matter (SPM) concentrations derived from the optical backscatter using filtration samples. All data is interpolated to the same temporal and vertical grid. Measurements were carried out either near the port of Harlingen (deployment 1 on cruises 1-3, deployment 2 on cruise 4) or at the end of the Kimstergat channel (deployment 2 on cruise 1-3, deployment 1 on cruise 4). The files filtration_cruiseX.nc contain the raw data of the filtration: dry and wet weight of the filters, filtrated volume, corresponding optical backscatter values and multiplication factors for the OBS in the box on the ship. The intercalibration between the OBS in the box and the in-situ OBS (mounted on a frame) is: OBS_box = 2.01*OBS_frame - 0.01. Details on the data acquisition and postprocessing (for the first three cruises) can be found in Schulz, K., Gerkema, T., 2018. An inversion of the estuarine circulation by sluice water discharge and its impact on suspended sediment transport. Estuar. Coast. Shelf Sci. 200, 31–40. Please note that this publication contains an error: SPM concentrations were underestimated by a factor of 4 for cruises 1 and 2 (SPM_correct = 4* SPM_publication) and by a factor of 5 for cruise 3 (SPM_correct = 5* SPM_publication). The SPM concentrations in the netcdf-files are corrected. A corrigendum will be published soon. Raw data is available upon request.

本数据集源于编号为13888的STW项目“盐沼用沉积物：泥浆动力装置的物理与生态学维度”，该项目由荷兰科学研究组织（NWO）部分资助。数据集包含8个名为cruiseXdeployment1/2.nc的NetCDF文件，以及4个名为filtration_cruiseX.nc的NetCDF文件。前8个NetCDF文件均包含一段12.5小时的垂向剖面记录，内容涵盖流速、温度、盐度、光学后向散射数据，以及通过过滤样品由光学后向散射数据反演得到的悬浮颗粒物（Suspended Particulate Matter，SPM）浓度。所有数据均已插值至统一的时间与垂向网格。观测站位分别位于哈林根港附近（第1-3次巡航的部署1、第4次巡航的部署2），以及金斯特加特航道末端（第1-3次巡航的部署2、第4次巡航的部署1）。filtration_cruiseX.nc文件包含过滤实验的原始数据：滤膜干重、湿重、过滤体积、对应光学后向散射值，以及船上箱式光学后向散射传感器（Optical Backscatter Sensor，OBS）的校正系数。船上箱式OBS与原位OBS（安装于支架上）的互校正公式为：OBS_箱式 = 2.01×OBS_支架 - 0.01。关于前三次巡航的数据采集与后处理细节，可参阅Schulz K.、Gerkema T.于2018年发表的论文《An inversion of the estuarine circulation by sluice water discharge and its impact on suspended sediment transport》，刊载于《Estuar. Coast. Shelf Sci.》200卷，页码31-40。请注意该文献存在一处错误：第1、2次巡航的SPM浓度被低估了4倍（校正后SPM浓度 = 4×原文献中的SPM浓度），第3次巡航的SPM浓度被低估了5倍（校正后SPM浓度 = 5×原文献中的SPM浓度）。本数据集NetCDF文件中的SPM浓度已完成校正。一篇勘误表即将发表。原始数据可应要求提供。