IMOS - Deep Water Moorings - Southern Ocean Time Series (SOTS) - all delayed-mode data

This collection consists of observations from the deep-water moorings at the Southern Ocean Time Series (SOTS) site in the sub-Antarctic Zone (SAZ), southwest of Tasmania, near 47S, 142E. The moorings are 1) the Pulse biogeochemistry mooring (instrumentation was moved to the FluxPulse mooring in 2016, and then to the SOFS mooring); 2) the Sub-Antarctic Zone (SAZ) sediment trap mooring; and 3) the Southern Ocean Flux Station (SOFS) (the instrumentation was briefly moved to the FluxPulse mooring in 2016). All three are operated by the Australian Bluewater Observing System. Data are processed in delayed mode and available in NetCDF format. The Southern Ocean Time Series (SOTS) sub-facility provides high temporal resolution observations in sub-Antarctic waters. Observations are broad and include measurements of physical, chemical and biogeochemical parameters from multiple deep-water moorings. The emphasis is on inter-annual variations of upper ocean properties and their influence on exchange with the deep ocean. The time-series provided permit investigation into issues of ocean physics and chemistry, climate change, carbon cycling and biogeochemical controls on marine productivity. The Pulse biogeochemistry mooring is used to measure upper ocean carbon cycle and phytoplankton productivity processes. Measured parameters include temperature, salinity, dissolved oxygen, nitrate, clorophyll and turbidity. This mooring also collects water samples for measures of dissolved carbon and nutrients, and phytoplankton microscopic identification. The SAZ sediment trap mooring is used to collect sinking particles to quantify carbon transports, and provides current meter measurements and a deep ocean CTD to measure heat contents below the depth of Argo profiling float measurements. The SOFS mooring has dual sets of radiometers, temperature and humidity sensors, precipitation gauges and sonic anemometers, providing the measurements necessary for computing air-sea fluxes of heat, momentum and mass. Surface photosynthetically active radiation and surface UV are also measured, to help assess light available for phytoplankton production.

本数据集收录了塔斯马尼亚岛西南方向、南纬47°、东经142°附近的亚南极区（sub-Antarctic Zone, SAZ）内南大洋时间序列（Southern Ocean Time Series, SOTS）站点的深水锚系观测数据。所涉及的锚系共有三套：1. Pulse生物地球化学锚系（其观测设备于2016年迁至FluxPulse锚系，后又迁至SOFS锚系）；2. 亚南极区（SAZ）沉积物捕获器锚系；3. 南大洋通量站（Southern Ocean Flux Station, SOFS）（其观测设备曾于2016年短暂迁至FluxPulse锚系）。上述三套锚系均由澳大利亚蓝水观测系统（Australian Bluewater Observing System）运维。所有数据均经过延迟模式处理，以NetCDF格式对外发布。南大洋时间序列（SOTS）子设施可在亚南极海域提供高时间分辨率的观测数据，观测覆盖范围广泛，涵盖多套深水锚系获取的物理、化学及生物地球化学参数。该数据集重点关注上层海洋属性的年际变化及其与深层海洋的交换过程影响，所提供的时间序列可用于开展海洋物理与化学、气候变化、碳循环以及海洋生产力生物地球化学调控机制等相关研究。Pulse生物地球化学锚系用于观测上层海洋碳循环及浮游植物生产力过程，观测参数包括温度、盐度、溶解氧、硝酸盐、叶绿素及浊度。该锚系还会采集水样，用于溶解碳、营养盐测定以及浮游植物显微镜鉴定。SAZ沉积物捕获器锚系用于收集沉降颗粒物以量化碳传输量，同时配备海流计与深层海洋温盐深（CTD）仪，用于测量Argo剖面浮标观测深度以下的海洋热含量。SOFS锚系搭载有两套辐射计、温湿度传感器、雨量计与超声风速仪，可获取计算海-气间热、动量及质量通量所需的观测数据；同时还会测量海面光合有效辐射与紫外辐射，以辅助评估浮游植物生产所需的光照条件。