1990 - 2019 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Predictor variables and groundtruth samples for north-west European continental shelf quantitative sediment analysis

Input data used to model sediment grain size for the north-west European continental shelf. Data includes: Sediment groundtruth observations with measured fractions of mud, sand and gravel, also converted to two additive log-ratios. These total 45761 samples. Also included are the eight predictor variables that were used to model sediment grain size. These were: Bathymetry, Bathymetric position index at a 50-pixel radii, Bathymetric position index at a 434-pixel radii, Distance from coast, Current speed at the seabed, Wave peak orbital velocity at the seabed, and suspended inorganic particulate matter for summer and winter as two separate variables.本数据集为西北欧大陆架沉积物粒度模拟所用的输入数据。数据集包含以下两类内容：第一类为沉积物实地真值观测数据，记录了泥、砂、砾石的实测组分占比，并将这些组分转换为两类加性对数比率（additive log-ratios），该类数据共计45761个样本；第二类为用于构建沉积物粒度模型的8个预测变量，具体为：测深（Bathymetry）、50像素半径下的水深位置指数（Bathymetric position index）、434像素半径下的水深位置指数、离岸距离、海底海流流速、海底波浪峰值轨道速度，以及夏季与冬季的悬浮无机颗粒物含量（二者为两个独立变量）。