IMOS - National Mooring Network - National Reference Stations - Combined long-term hydrological data product (1944-2014)

The National Reference Station (NRS) network is designed to provide baseline information, at timescales relevant to human response, that is required to understand how large-scale, long-term change and variability in the global ocean are affecting the ecosystems of Australia's coastal seas. The stations are operated by the National Mooring Network (formerly known as the Australian National Mooring Network (ANMN)), a facility of the Integrated Marine Observing System (IMOS). This product includes temperature and salinity measurements from the original water sampling program carried out by CSIRO since the 1940s, and the water sampling and CTD casts carried out by IMOS since 2009. Sampling under CSIRO was undertaken at intervals of one to several weeks, and under IMOS, sampling is approximately monthly. Temperature measurements were taken from reversing thermometers by CSIRO, and from profiling CTDs by IMOS. These are combined into a single continuous timeseries, for measurements at the surface and depths up to 50m. Currently this product is only available for the Maria Island NRS. Located off the east coast of Maria Island in Tasmania, the station has provided the longest high quality ocean time series in the Southern Hemisphere, consisting of biogeochemical samples collected since 1944 and high-frequency moored instrument data since 2008..

国家参考站（National Reference Station, NRS）网络旨在提供与人类响应相关时间尺度下的基准信息，该信息是解析全球海洋大规模长期变化与变异性如何影响澳大利亚近岸海域生态系统的必要支撑数据。
该站点由国家锚定网络（原澳大利亚国家锚定网络，Australian National Mooring Network, ANMN）运维，其为综合海洋观测系统（Integrated Marine Observing System, IMOS）的下设设施。
本数据集包含澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation, CSIRO）自20世纪40年代起开展的原始水体采样项目所获取的温度与盐度数据，以及IMOS自2009年起实施的水体采样与CTD剖面测量数据。
CSIRO时期的采样间隔为1至数周，IMOS时期的采样频率约为每月1次。CSIRO采用倒置式温度计获取温度数据，IMOS则使用剖面式CTD开展温度测量。上述两类数据被整合为一套连续完整的时间序列，覆盖表层及50米以浅的观测深度。
目前本数据集仅针对玛利亚岛国家参考站开放使用。该站点坐落于塔斯马尼亚州玛利亚岛东海岸外海域，拥有南半球最长的高质量海洋时间序列观测记录，其观测数据包含自1944年起采集的生物地球化学样本，以及自2008年起获取的高频锚定仪器观测数据。