MARVL3 - Australian shelf salinity data atlas

Salinity data collected on the Australian shelf between 1995 to 2014 have been assembled into a single data collection. Profiles, trajectories and timeseries datasets within the 500m depth contour and collected by different organisations have been included. A full list of datasets used to produce this collection is provided below: * The Integrated Marine Observing System (IMOS): - Seals CTD profiles - Argo profiles - Glider deployments - CTD Casts performed at National Reference Station - Moorings - AUV deployments - Sensor networks in the Great Barrier Reef - Ship underway * Royal Australian Navy (RAN): - Sea Surface Temperature measurements on NSW coast * The Australian Institute of Marine Science (AIMS): - CTD casts * Defence Science and Technology Organisation: - Glider deployments * Charles Darwin University – Xavier Hoenner: - Hawksbill Turtles * CSIRO Ocean and Atmosphere: - Moorings - Trajectory - Underway * World Ocean Database 2013 (WOD) – standard depth data products: - XBT profiles (XBT) - CTD casts (CTD) - Surface only data (SUR) - Undulating Oceano Recorder (UOR) Salinity measurements from the different sources have been assembled into a common data structure in a relational database. Quality Control flags have been mapped to a common scheme and associated to each measurements. Around 25 Million measurements are available in this dataset collection. Datasets like gliders, moorings or ship underway are sampled at high resolution (e.g.: data every seconds). A sub-sampling approach has been applied to some of these datasets in order to reduce the number of measurements. For example, ship underway data have been averaged over a period of 1 minute and sub-sampled every 5 minutes. Hourly average have been performed on most of the moorings timeseries. Various quality control checks have been performed on the dataset. A full list of quality control checks is available in the Lineage section of the metadata records. A national shelf and coastal data atlas has been created using all the salinity measurements. The observations have been binned on an horizontal grid of ¼ degree with standard vertical levels (every 10 meters from the surface to -500m). Moreover, a monthly time range have been used over the period January 1995 to December 2014. The number of observations in each grid square has been determined and additional statistics have been calculated like the mean, the standard deviation, the minimum and maximum values for each grid square. Two WFS services have been created to publish the individual observations, and the statistics, used to produce the data atlas.1995年至2014年间于澳大利亚大陆架采集的盐度数据已被整合为单一数据集集合。本集合纳入了500米等深线范围内、由不同机构采集的剖面数据、轨迹数据与时序数据集。用于构建本数据集集合的完整数据集列表如下： * 澳大利亚综合海洋观测系统（Integrated Marine Observing System, IMOS）： - 海豹搭载CTD剖面数据 - Argo剖面数据 - 滑翔机部署观测数据 - 国家参考站位CTD施放数据 - 锚系观测数据 - 自主水下航行器（Autonomous Underwater Vehicle, AUV）部署观测数据 - 大堡礁传感器网络观测数据 - 船舶走航观测数据 * 澳大利亚皇家海军（Royal Australian Navy, RAN）： - 新南威尔士州海岸海表温度测量数据 * 澳大利亚海洋科学研究所（Australian Institute of Marine Science, AIMS）： - CTD施放数据 * 国防科学与技术组织： - 滑翔机部署观测数据 * 查尔斯·达尔文大学——泽维尔·亨纳（Xavier Hoenner）： - 玳瑁海龟观测数据 * 联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation, CSIRO）海洋与大气分部： - 锚系观测数据 - 轨迹数据 - 船舶走航观测数据 * 2013年世界海洋数据库（World Ocean Database 2013, WOD）——标准深度数据产品： - 抛弃式温深计（Expendable Bathythermograph, XBT）剖面数据 - CTD施放数据 - 仅海表观测数据（SUR） - 起伏海洋记录仪（Undulating Oceano Recorder, UOR）观测数据 来自不同来源的盐度测量数据已被整合至关系数据库中的统一数据结构中。质量控制标记已被映射至统一标准，并关联至每一条测量数据。 本数据集集合中共包含约2500万条测量数据。 滑翔机、锚系观测或船舶走航等数据集以高分辨率采样（例如每秒采集一次数据）。针对部分此类数据集已采用子采样方法以减少测量数据量：例如，船舶走航数据已被处理为1分钟平均值，并每5分钟进行一次子采样；多数锚系时序数据集已被处理为小时平均值。 本数据集已完成多项质量控制检查。完整的质量控制检查列表可在元数据记录的溯源（Lineage）章节中获取。 基于所有盐度测量数据，已构建国家大陆架与近岸数据图集。观测数据已被网格化至0.25度的水平网格，并采用标准垂直分层（从海表至-500米，每10米一层）。此外，图集的时间范围为1995年1月至2014年12月的月度时段。已统计每个网格单元内的观测数据量，并计算了各网格单元的额外统计量，包括平均值、标准差、最小值与最大值。 已创建两个Web要素服务（Web Feature Service, WFS），用于发布单条观测数据以及用于构建数据图集的统计数据。